/* Reset and Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    /* Color Palette - Calming Student-Friendly Colors */
    --primary-color: #4A90E2; /* Light Blue */
    --primary-dark: #357ABD;
    --secondary-color: #7ED321; /* Soft Green */
    --accent-color: #9B59B6; /* Soft Purple */
    --background-color: #F8FAFC;
    --surface-color: #FFFFFF;
    --text-primary: #2C3E50;
    --text-secondary: #7F8C8D;
    --border-color: #E1E8ED;
    --success-color: #27AE60;
    --warning-color: #F39C12;
    --error-color: #E74C3C;
    
    /* Typography */
    --font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    --font-size-small: 0.875rem;
    --font-size-base: 1rem;
    --font-size-large: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: 1.5rem;
    --font-size-3xl: 2rem;
    --font-size-4xl: 2.5rem;
    
    /* Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;
    
    /* Border Radius */
    --border-radius-sm: 4px;
    --border-radius-md: 8px;
    --border-radius-lg: 12px;
    --border-radius-xl: 16px;
    
    /* Shadows */
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px rgba(0, 0, 0, 0.1);
    
    /* Transitions */
    --transition-fast: 0.15s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
}

body {
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    line-height: 1.6;
    color: var(--text-primary);
    background-color: var(--background-color);
    overflow-x: hidden;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-weight: 600;
    line-height: 1.3;
    margin-bottom: var(--spacing-md);
}

h1 { font-size: var(--font-size-4xl); }
h2 { font-size: var(--font-size-3xl); }
h3 { font-size: var(--font-size-2xl); }
h4 { font-size: var(--font-size-xl); }

p {
    margin-bottom: var(--spacing-md);
    color: var(--text-secondary);
}

/* Navigation */
.navbar {
    position: fixed;
    top: 0;
    width: 100%;
    background: var(--surface-color);
    box-shadow: var(--shadow-sm);
    z-index: 1000;
    transition: var(--transition-normal);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 70px;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.logo-icon {
    font-size: var(--font-size-2xl);
}

.nav-logo h1 {
    font-size: var(--font-size-xl);
    margin: 0;
    color: var(--primary-color);
}

.nav-logo a {
    text-decoration: none;
    color: inherit;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    transition: all 0.3s ease;
}

.nav-logo a:hover {
    transform: scale(1.05);
    color: var(--primary-color);
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: var(--spacing-xl);
}

.nav-link {
    text-decoration: none;
    color: var(--text-primary);
    font-weight: 500;
    transition: var(--transition-fast);
    position: relative;
}

.nav-link:hover {
    color: var(--primary-color);
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--primary-color);
    transition: var(--transition-fast);
}

.nav-link:hover::after {
    width: 100%;
}

.hamburger {
    display: none;
    flex-direction: column;
    cursor: pointer;
    gap: 4px;
}

.hamburger span {
    width: 25px;
    height: 3px;
    background: var(--text-primary);
    transition: var(--transition-fast);
}

/* Tools Section */
.tools-section {
    padding: 4rem 0;
    background: linear-gradient(135deg, #2c3e50 0%, #34495e 100%);
    color: white;
}

.tools-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.tool-card {
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    border-radius: 20px;
    padding: 2rem;
    text-align: center;
    transition: all 0.3s ease;
    border: 1px solid rgba(255, 255, 255, 0.2);
    position: relative;
    overflow: hidden;
}

.tool-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.1), transparent);
    transition: left 0.5s ease;
}

.tool-card:hover::before {
    left: 100%;
}

.tool-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.2);
    background: rgba(255, 255, 255, 0.15);
}

.tool-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
    display: block;
}

.tool-card h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
    color: white;
}

.tool-card p {
    color: rgba(255, 255, 255, 0.9);
    margin-bottom: 1.5rem;
    line-height: 1.6;
}

.tool-btn {
    display: inline-block;
    background: rgba(255, 255, 255, 0.2);
    color: white;
    padding: 12px 24px;
    border-radius: 25px;
    text-decoration: none;
    font-weight: 600;
    transition: all 0.3s ease;
    border: 2px solid rgba(255, 255, 255, 0.3);
}

.tool-btn:hover {
    background: rgba(255, 255, 255, 0.3);
    transform: scale(1.05);
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.2);
}

/* Hero Section */
.hero {
    background: linear-gradient(135deg, #1a1a2e 0%, #16213e 25%, #0f3460 50%, #533483 75%, #7209b7 100%);
    color: white;
    padding: 140px 0 100px;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: 
        radial-gradient(circle at 20% 80%, rgba(255, 255, 0, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 80% 20%, rgba(255, 255, 0, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 40% 40%, rgba(255, 255, 0, 0.05) 0%, transparent 50%);
    animation: float 20s ease-in-out infinite;
}

.hero::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><defs><pattern id="grid" width="10" height="10" patternUnits="userSpaceOnUse"><path d="M 10 0 L 0 0 0 10" fill="none" stroke="rgba(255,255,0,0.1)" stroke-width="0.5"/></pattern></defs><rect width="100" height="100" fill="url(%23grid)"/></svg>');
    opacity: 0.3;
    animation: gridMove 15s linear infinite;
}

.hero .particles {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    overflow: hidden;
    z-index: 1;
}

.hero .particle {
    position: absolute;
    width: 6px;
    height: 6px;
    background: linear-gradient(45deg, #fff7e6, #ffd700);
    border-radius: 50%;
    box-shadow: 0 0 10px rgba(255, 215, 0, 0.6);
    animation: particleFloat 8s ease-in-out infinite;
}

.hero .particle:nth-child(1) { left: 10%; animation-delay: 0s; }
.hero .particle:nth-child(2) { left: 20%; animation-delay: 1s; }
.hero .particle:nth-child(3) { left: 30%; animation-delay: 2s; }
.hero .particle:nth-child(4) { left: 40%; animation-delay: 3s; }
.hero .particle:nth-child(5) { left: 50%; animation-delay: 4s; }
.hero .particle:nth-child(6) { left: 60%; animation-delay: 5s; }
.hero .particle:nth-child(7) { left: 70%; animation-delay: 0s; }
.hero .particle:nth-child(8) { left: 80%; animation-delay: 1s; }
.hero .particle:nth-child(9) { left: 90%; animation-delay: 2s; }

.hero-container {
    max-width: 900px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
    position: relative;
    z-index: 2;
    animation: fadeInUp 1s ease-out;
}

.hero h1 {
    font-size: clamp(2.5rem, 5vw, 4rem);
    margin-bottom: var(--spacing-xl);
    font-weight: 900;
    line-height: 1.1;
    text-shadow: 
        0 0 20px rgba(255, 255, 0, 0.5),
        0 4px 20px rgba(0, 0, 0, 0.3);
    background: linear-gradient(45deg, #ffffff 0%, #fff7e6 25%, #ffd700 50%, #fff7e6 75%, #ffffff 100%);
    background-size: 200% 200%;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    animation: shimmer 4s ease-in-out infinite;
    letter-spacing: -0.02em;
    position: relative;
}

.hero h1::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 120px;
    height: 4px;
    background: linear-gradient(90deg, transparent, #ffd700, transparent);
    border-radius: 2px;
    animation: glow 2s ease-in-out infinite alternate;
}

.hero p {
    font-size: clamp(1.1rem, 2.5vw, 1.4rem);
    margin-bottom: var(--spacing-3xl);
    color: #fff7e6;
    line-height: 1.7;
    font-weight: 400;
    text-shadow: 
        0 2px 10px rgba(0, 0, 0, 0.3),
        0 0 20px rgba(255, 215, 0, 0.3);
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
    position: relative;
    letter-spacing: 0.02em;
}

.hero p::after {
    content: '';
    position: absolute;
    bottom: -20px;
    left: 50%;
    transform: translateX(-50%);
    width: 100px;
    height: 3px;
    background: linear-gradient(90deg, transparent, #ffd700, transparent);
    border-radius: 2px;
    animation: glow 2s ease-in-out infinite alternate;
}

.hero-stats {
    display: flex;
    justify-content: center;
    gap: clamp(2rem, 4vw, 4rem);
    flex-wrap: wrap;
    margin-top: var(--spacing-2xl);
    position: relative;
    z-index: 2;
}

.stat {
    text-align: center;
    background: rgba(255, 255, 255, 0.08);
    backdrop-filter: blur(15px);
    border-radius: 25px;
    padding: 2rem 2.5rem;
    border: 2px solid rgba(255, 215, 0, 0.3);
    transition: all 0.4s ease;
    position: relative;
    overflow: hidden;
    box-shadow: 
        0 8px 32px rgba(0, 0, 0, 0.3),
        inset 0 1px 0 rgba(255, 255, 255, 0.1);
}

.stat::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 215, 0, 0.2), transparent);
    transition: left 0.6s ease;
}

.stat:hover::before {
    left: 100%;
}

.stat:hover {
    transform: translateY(-8px) scale(1.05);
    box-shadow: 
        0 20px 40px rgba(0, 0, 0, 0.4),
        0 0 30px rgba(255, 215, 0, 0.3);
    background: rgba(255, 255, 255, 0.12);
    border-color: rgba(255, 215, 0, 0.6);
}

.stat-number {
    display: block;
    font-size: clamp(2.5rem, 5vw, 3.5rem);
    font-weight: 900;
    margin-bottom: var(--spacing-sm);
    background: linear-gradient(45deg, #ffffff 0%, #ffd700 50%, #ffffff 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    text-shadow: 0 0 20px rgba(255, 215, 0, 0.5);
    animation: numberGlow 3s ease-in-out infinite;
}

.stat-label {
    font-size: clamp(0.9rem, 1.5vw, 1rem);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1px;
    color: #fff7e6;
    text-shadow: 0 2px 10px rgba(0, 0, 0, 0.3);
    position: relative;
}

.stat-label::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 50%;
    transform: translateX(-50%);
    width: 30px;
    height: 2px;
    background: linear-gradient(90deg, transparent, #ffd700, transparent);
    border-radius: 1px;
}

/* Main Content */
.main-content {
    max-width: 1200px;
    margin: 0 auto;
    padding: var(--spacing-2xl) var(--spacing-lg);
}

.calculator-section {
    margin-bottom: var(--spacing-2xl);
    padding: var(--spacing-2xl);
    background: var(--surface-color);
    border-radius: var(--border-radius-xl);
    box-shadow: var(--shadow-md);
    transition: var(--transition-normal);
}

.calculator-section:hover {
    box-shadow: var(--shadow-lg);
}

.section-header {
    text-align: center;
    margin-bottom: var(--spacing-2xl);
}

.section-header h2 {
    color: var(--primary-color);
    margin-bottom: var(--spacing-sm);
}

.calculator-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-2xl);
    align-items: start;
}

/* Input Sections */
.input-section {
    background: var(--background-color);
    padding: var(--spacing-xl);
    border-radius: var(--border-radius-lg);
}

.subjects-container h3,
.semesters-container h3 {
    margin-bottom: var(--spacing-lg);
    color: var(--text-primary);
}

.semester-note {
    font-size: var(--font-size-small);
    color: var(--text-secondary);
    margin-bottom: var(--spacing-lg);
    font-style: italic;
}

.subject-item,
.semester-item {
    background: var(--surface-color);
    padding: var(--spacing-lg);
    border-radius: var(--border-radius-md);
    margin-bottom: var(--spacing-md);
    box-shadow: var(--shadow-sm);
    transition: var(--transition-fast);
}

.subject-item:hover,
.semester-item:hover {
    box-shadow: var(--shadow-md);
}

.subject-row,
.semester-row {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr auto;
    gap: var(--spacing-md);
    align-items: center;
}

.semester-row {
    grid-template-columns: 1fr 1fr auto;
}

.input-group {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.input-group label {
    font-weight: 500;
    color: var(--text-primary);
}

.input-group input,
.input-group select {
    padding: var(--spacing-sm) var(--spacing-md);
    border: 2px solid var(--border-color);
    border-radius: var(--border-radius-sm);
    font-size: var(--font-size-base);
    transition: var(--transition-fast);
}

.input-group input:focus,
.input-group select:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(74, 144, 226, 0.1);
}

.remove-btn {
    background: var(--error-color);
    color: white;
    border: none;
    padding: var(--spacing-sm);
    border-radius: var(--border-radius-sm);
    cursor: pointer;
    transition: var(--transition-fast);
    font-size: var(--font-size-small);
}

.remove-btn:hover {
    background: #c0392b;
    transform: scale(1.05);
}

/* Buttons */
.btn {
    padding: var(--spacing-sm) var(--spacing-lg);
    border: none;
    border-radius: var(--border-radius-md);
    font-size: var(--font-size-base);
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition-fast);
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    text-decoration: none;
}

.btn-primary {
    background: var(--primary-color);
    color: white;
}

.btn-primary:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.btn-secondary {
    background: var(--secondary-color);
    color: white;
}

.btn-secondary:hover {
    background: #6ab020;
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

/* Result Sections */
.result-section {
    position: sticky;
    top: 100px;
}

.result-card {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--accent-color) 100%);
    color: white;
    padding: var(--spacing-2xl);
    border-radius: var(--border-radius-lg);
    text-align: center;
    box-shadow: var(--shadow-lg);
    transition: var(--transition-normal);
    position: relative;
    overflow: hidden;
    margin-bottom: var(--spacing-lg);
}

.result-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    transition: var(--transition-slow);
}

.result-card:hover::before {
    left: 100%;
}

.result-card h3 {
    margin-bottom: var(--spacing-lg);
    color: white;
}

.gpa-display {
    margin-bottom: var(--spacing-xl);
    position: relative;
}

.gpa-number {
    display: block;
    font-size: 4rem;
    font-weight: 700;
    line-height: 1;
    margin-bottom: var(--spacing-sm);
    transition: var(--transition-normal);
}

.gpa-label {
    font-size: var(--font-size-large);
    opacity: 0.9;
}

.gpa-details {
    margin-bottom: var(--spacing-xl);
}

.detail-item {
    display: flex;
    justify-content: space-between;
    margin-bottom: var(--spacing-sm);
    padding: var(--spacing-sm) 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.2);
}

.detail-item:last-child {
    border-bottom: none;
}

.detail-label {
    opacity: 0.9;
}

.detail-value {
    font-weight: 600;
}

/* Print Section */
.print-section {
    background: var(--surface-color);
    padding: var(--spacing-xl);
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-md);
    border: 2px solid var(--border-color);
}

.print-section h3 {
    margin-bottom: var(--spacing-lg);
    color: var(--primary-color);
    text-align: center;
}

.print-input {
    margin-bottom: var(--spacing-lg);
}

.print-input label {
    display: block;
    font-weight: 500;
    color: var(--text-primary);
    margin-bottom: var(--spacing-sm);
}

.print-input input {
    width: 100%;
    padding: var(--spacing-sm) var(--spacing-md);
    border: 2px solid var(--border-color);
    border-radius: var(--border-radius-sm);
    font-size: var(--font-size-base);
    transition: var(--transition-fast);
}

.print-input input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(74, 144, 226, 0.1);
}

/* Print Card Styles */
.print-card {
    display: none;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--accent-color) 100%);
    color: white;
    padding: var(--spacing-2xl);
    border-radius: var(--border-radius-lg);
    text-align: center;
    box-shadow: var(--shadow-lg);
    max-width: 600px;
    margin: 0 auto;
    position: relative;
    overflow: hidden;
}

.print-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    transition: var(--transition-slow);
}

.print-card-content {
    position: relative;
    z-index: 1;
}

.print-card-header {
    margin-bottom: var(--spacing-xl);
}

.print-card-title {
    font-size: var(--font-size-2xl);
    font-weight: 700;
    margin-bottom: var(--spacing-sm);
    color: white;
}

.print-card-subtitle {
    font-size: var(--font-size-base);
    opacity: 0.9;
    margin-bottom: var(--spacing-lg);
}

.student-name {
    font-size: var(--font-size-xl);
    font-weight: 600;
    margin-bottom: var(--spacing-xl);
    color: white;
}

.print-gpa-display {
    margin-bottom: var(--spacing-xl);
}

.print-gpa-number {
    font-size: 4rem;
    font-weight: 700;
    line-height: 1;
    margin-bottom: var(--spacing-sm);
    color: white;
}

.print-gpa-label {
    font-size: var(--font-size-large);
    opacity: 0.9;
    color: white;
}

.print-gpa-details {
    margin-bottom: var(--spacing-xl);
}

.print-detail-item {
    display: flex;
    justify-content: space-between;
    margin-bottom: var(--spacing-sm);
    padding: var(--spacing-sm) 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.2);
}

.print-detail-item:last-child {
    border-bottom: none;
}

.print-detail-label {
    opacity: 0.9;
    color: white;
}

.print-detail-value {
    font-weight: 600;
    color: white;
}

.print-card-footer {
    font-size: var(--font-size-small);
    opacity: 0.7;
    margin-top: var(--spacing-xl);
    padding-top: var(--spacing-lg);
    border-top: 1px solid rgba(255, 255, 255, 0.2);
    color: white;
}

.print-date {
    font-size: var(--font-size-small);
    opacity: 0.6;
    margin-top: var(--spacing-sm);
    color: white;
}

/* Grade Legend */
.grade-legend {
    margin-top: var(--spacing-xl);
    padding-top: var(--spacing-xl);
    border-top: 1px solid var(--border-color);
}

.grade-legend h4 {
    margin-bottom: var(--spacing-md);
    color: var(--text-primary);
}

.grade-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(80px, 1fr));
    gap: var(--spacing-sm);
}

.grade-item {
    display: flex;
    justify-content: space-between;
    padding: var(--spacing-sm);
    background: var(--surface-color);
    border-radius: var(--border-radius-sm);
    font-size: var(--font-size-small);
    box-shadow: var(--shadow-sm);
}

.grade {
    font-weight: 600;
    color: var(--primary-color);
}

.points {
    color: var(--text-secondary);
}

/* Converter Section */
.converter-tabs {
    display: flex;
    margin-bottom: var(--spacing-xl);
    background: var(--background-color);
    border-radius: var(--border-radius-md);
    padding: var(--spacing-sm);
}

.tab-btn {
    flex: 1;
    padding: var(--spacing-md);
    border: none;
    background: transparent;
    color: var(--text-secondary);
    font-weight: 500;
    cursor: pointer;
    border-radius: var(--border-radius-sm);
    transition: var(--transition-fast);
}

.tab-btn.active {
    background: var(--primary-color);
    color: white;
}

.tab-content {
    display: none;
}

.tab-content.active {
    display: block;
}

.converter-content {
    background: var(--background-color);
    padding: var(--spacing-xl);
    border-radius: var(--border-radius-lg);
}

.conversion-result {
    margin-top: var(--spacing-xl);
    text-align: center;
}

.result-display {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    margin-top: var(--spacing-md);
}

.result-value {
    font-size: var(--font-size-3xl);
    font-weight: 700;
    color: var(--primary-color);
}

.result-label {
    font-size: var(--font-size-large);
    color: var(--text-secondary);
}

/* FAQ Section */
.faq-section {
    background: var(--surface-color);
    border-radius: var(--border-radius-xl);
    box-shadow: var(--shadow-md);
    padding: var(--spacing-2xl);
}

.faq-container {
    max-width: 800px;
    margin: 0 auto;
}

.faq-item {
    border-bottom: 1px solid var(--border-color);
    margin-bottom: var(--spacing-lg);
}

.faq-item:last-child {
    border-bottom: none;
}

.faq-question {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-lg) 0;
    cursor: pointer;
    transition: var(--transition-fast);
}

.faq-question:hover h3 {
    color: var(--primary-color);
}

.faq-question h3 {
    margin: 0;
    font-size: var(--font-size-large);
    transition: var(--transition-fast);
}

.faq-toggle {
    font-size: var(--font-size-xl);
    font-weight: 700;
    color: var(--primary-color);
    transition: var(--transition-fast);
}

.faq-item.active .faq-toggle {
    transform: rotate(45deg);
}

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: var(--transition-slow);
}

.faq-item.active .faq-answer {
    max-height: 500px;
    padding-bottom: var(--spacing-lg);
}

.faq-answer p {
    margin-bottom: var(--spacing-md);
}

.faq-answer ul {
    margin-left: var(--spacing-lg);
    margin-bottom: var(--spacing-md);
}

.faq-answer li {
    margin-bottom: var(--spacing-sm);
}

/* Footer */
.footer {
    background: var(--text-primary);
    color: white;
    padding: var(--spacing-xl) 0;
    margin-top: var(--spacing-2xl);
}

.footer-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
}

.footer-content {
    text-align: center;
}

.footer-content p {
    margin-bottom: var(--spacing-sm);
    color: rgba(255, 255, 255, 0.8);
}

.footer-content p:last-child {
    margin-bottom: 0;
}

.footer-content a {
    color: var(--primary-color);
    text-decoration: none;
    transition: var(--transition-fast);
}

.footer-content a:hover {
    color: white;
    text-decoration: underline;
}

/* Responsive Design */
@media (max-width: 768px) {
    .hero {
        padding: 100px 0 80px;
    }
    
    .hero h1 {
        font-size: clamp(2rem, 6vw, 3rem);
        margin-bottom: var(--spacing-lg);
    }
    
    .hero p {
        font-size: clamp(1rem, 3vw, 1.2rem);
        margin-bottom: var(--spacing-2xl);
    }
    
    .hero-stats {
        gap: 1.5rem;
        margin-top: var(--spacing-xl);
    }
    
    .stat {
        padding: 1rem 1.5rem;
        min-width: 120px;
    }
    
    .stat-number {
        font-size: clamp(1.5rem, 5vw, 2.5rem);
    }
    
    .stat-label {
        font-size: clamp(0.8rem, 2vw, 0.9rem);
    }
    
    .tools-container {
        grid-template-columns: 1fr;
        gap: 1.5rem;
        padding: 0 1rem;
    }
    
    .tool-card {
        padding: 1.5rem;
    }
    
    .tool-icon {
        font-size: 2.5rem;
    }
    
    .tool-card h3 {
        font-size: 1.3rem;
    }
    .nav-menu {
        position: fixed;
        left: -100%;
        top: 70px;
        flex-direction: column;
        background-color: var(--surface-color);
        width: 100%;
        text-align: center;
        transition: var(--transition-normal);
        box-shadow: var(--shadow-md);
        padding: var(--spacing-xl) 0;
    }

    .nav-menu.active {
        left: 0;
    }

    .hamburger {
        display: flex;
    }

    .hamburger.active span:nth-child(1) {
        transform: rotate(-45deg) translate(-5px, 6px);
    }

    .hamburger.active span:nth-child(2) {
        opacity: 0;
    }

    .hamburger.active span:nth-child(3) {
        transform: rotate(45deg) translate(-5px, -6px);
    }

    .hero h1 {
        font-size: var(--font-size-3xl);
    }

    .hero-stats {
        flex-direction: column;
        gap: var(--spacing-lg);
    }

    .calculator-container {
        grid-template-columns: 1fr;
        gap: var(--spacing-lg);
    }

    .result-section {
        position: static;
    }

    .subject-row,
    .semester-row {
        grid-template-columns: 1fr;
        gap: var(--spacing-sm);
    }

    .semester-row {
        grid-template-columns: 1fr;
    }

    .gpa-number {
        font-size: 3rem;
    }

    .converter-tabs {
        flex-direction: column;
    }

    .footer-content {
        grid-template-columns: 1fr;
        text-align: center;
    }
}

@media (max-width: 480px) {
    .main-content {
        padding: var(--spacing-lg) var(--spacing-md);
    }

    .calculator-section {
        padding: var(--spacing-lg);
    }

    .hero {
        padding: 100px 0 60px;
    }

    .hero h1 {
        font-size: var(--font-size-2xl);
    }

    .gpa-number {
        font-size: 2.5rem;
    }
}

/* Smooth Scrolling */
html {
    scroll-behavior: smooth;
}

/* Loading Animation */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes shimmer {
    0%, 100% {
        background-position: 0% 50%;
    }
    50% {
        background-position: 100% 50%;
    }
}

@keyframes float {
    0%, 100% {
        transform: translateY(0px);
    }
    50% {
        transform: translateY(-10px);
    }
}

@keyframes rotate {
    from {
        transform: rotate(0deg);
    }
    to {
        transform: rotate(360deg);
    }
}

@keyframes particleFloat {
    0%, 100% {
        transform: translateY(100vh) scale(0);
        opacity: 0;
    }
    10% {
        opacity: 1;
    }
    90% {
        opacity: 1;
    }
    100% {
        transform: translateY(-100px) scale(1);
        opacity: 0;
    }
}

@keyframes gridMove {
    0% {
        transform: translateX(0) translateY(0);
    }
    100% {
        transform: translateX(-10px) translateY(-10px);
    }
}

@keyframes glow {
    0% {
        box-shadow: 0 0 5px rgba(255, 215, 0, 0.5);
    }
    100% {
        box-shadow: 0 0 20px rgba(255, 215, 0, 0.8);
    }
}

@keyframes numberGlow {
    0%, 100% {
        filter: brightness(1) drop-shadow(0 0 10px rgba(255, 215, 0, 0.3));
    }
    50% {
        filter: brightness(1.2) drop-shadow(0 0 20px rgba(255, 215, 0, 0.6));
    }
}

.calculator-section {
    animation: fadeIn 0.6s ease-out;
}

/* Success Animation */
@keyframes successPulse {
    0% {
        transform: scale(1);
    }
    50% {
        transform: scale(1.05);
    }
    100% {
        transform: scale(1);
    }
}

.success-animation {
    animation: successPulse 0.3s ease-in-out;
}

/* Enhanced Result Card Animations */
@keyframes resultGlow {
    0% {
        box-shadow: var(--shadow-lg);
    }
    50% {
        box-shadow: 0 0 30px rgba(74, 144, 226, 0.3), var(--shadow-lg);
    }
    100% {
        box-shadow: var(--shadow-lg);
    }
}

@keyframes resultPulse {
    0% {
        transform: scale(1);
    }
    50% {
        transform: scale(1.02);
    }
    100% {
        transform: scale(1);
    }
}

@keyframes numberChange {
    0% {
        transform: scale(1);
        color: white;
    }
    50% {
        transform: scale(1.1);
        color: #FFD700;
    }
    100% {
        transform: scale(1);
        color: white;
    }
}

.result-card.animated {
    animation: resultGlow 0.6s ease-in-out, resultPulse 0.6s ease-in-out;
}

.gpa-number.animated {
    animation: numberChange 0.6s ease-in-out;
}

/* Copy Success Message */
.copy-success {
    position: fixed;
    top: 20px;
    right: 20px;
    background: var(--success-color);
    color: white;
    padding: var(--spacing-md) var(--spacing-lg);
    border-radius: var(--border-radius-md);
    box-shadow: var(--shadow-lg);
    z-index: 1001;
    animation: fadeIn 0.3s ease-out;
}

/* Accessibility */
@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* Focus Styles */
button:focus,
input:focus,
select:focus {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}

/* Print Styles */
@media print {
    /* Hide everything except the print card */
    body * {
        visibility: hidden;
    }
    
    .print-card,
    .print-card * {
        visibility: visible;
    }
    
    .print-card {
        display: block !important;
        position: absolute;
        left: 0;
        top: 0;
        width: 100%;
        height: 100%;
        margin: 0;
        padding: var(--spacing-2xl);
        border-radius: 0;
        box-shadow: none;
        background: linear-gradient(135deg, var(--primary-color) 0%, var(--accent-color) 100%) !important;
        -webkit-print-color-adjust: exact !important;
        color-adjust: exact !important;
        print-color-adjust: exact !important;
    }
    
    /* Ensure proper page breaks */
    .print-card {
        page-break-after: always;
        page-break-inside: avoid;
    }
    
    /* Hide navigation and other elements */
    .navbar,
    .hero,
    .calculator-section,
    .faq-section,
    .footer,
    .btn,
    .print-section {
        display: none !important;
    }
    
    /* Reset body styles for print */
    body {
        margin: 0;
        padding: 0;
        background: white;
    }
    
    /* Ensure text is readable and colors are preserved */
    .print-card {
        color: white !important;
        font-family: var(--font-family) !important;
    }
    
    .print-card * {
        color: white !important;
    }
    
    /* Force color printing */
    * {
        -webkit-print-color-adjust: exact !important;
        color-adjust: exact !important;
        print-color-adjust: exact !important;
    }
}

/* Responsive adjustments for print section */
@media (max-width: 768px) {
    .print-section {
        margin-top: var(--spacing-lg);
    }
    
    .print-card {
        padding: 20px;
    }
    
    .print-gpa-number {
        font-size: 48px;
    }
    
    .print-gpa-details {
        grid-template-columns: 1fr;
        gap: 15px;
    }
} 

/* Popup Modal Styles */
.popup-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.7);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 10000;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
}

.popup-overlay.active {
    opacity: 1;
    visibility: visible;
}

.popup-modal {
    background: var(--surface-color);
    border-radius: var(--border-radius-xl);
    padding: var(--spacing-2xl);
    max-width: 500px;
    width: 90%;
    text-align: center;
    box-shadow: var(--shadow-xl);
    position: relative;
    transform: scale(0.7);
    transition: transform 0.3s ease;
}

.popup-overlay.active .popup-modal {
    transform: scale(1);
}

.popup-close {
    position: absolute;
    top: 15px;
    right: 20px;
    background: none;
    border: none;
    font-size: 24px;
    cursor: pointer;
    color: var(--text-secondary);
    transition: var(--transition-fast);
    width: 30px;
    height: 30px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
}

.popup-close:hover {
    background: var(--background-color);
    color: var(--text-primary);
}

.popup-title {
    font-size: var(--font-size-2xl);
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: var(--spacing-lg);
    line-height: 1.3;
}

.popup-description {
    font-size: var(--font-size-xl);
    font-weight: 700;
    color: var(--text-primary);
    line-height: 1.8;
    margin-bottom: var(--spacing-lg);
    direction: rtl;
    text-align: center;
    font-family: 'Arial', sans-serif;
}

.popup-heart {
    font-size: var(--font-size-3xl);
    margin: 0 var(--spacing-sm);
    animation: heartBeat 1.5s ease-in-out infinite;
}

@keyframes heartBeat {
    0% {
        transform: scale(1);
    }
    14% {
        transform: scale(1.1);
    }
    28% {
        transform: scale(1);
    }
    42% {
        transform: scale(1.1);
    }
    70% {
        transform: scale(1);
    }
}

/* Responsive adjustments for popup */
@media (max-width: 768px) {
    .popup-modal {
        padding: var(--spacing-xl);
        margin: var(--spacing-lg);
    }
    
    .popup-title {
        font-size: var(--font-size-xl);
    }
    
    .popup-description {
        font-size: var(--font-size-large);
    }
    
    .popup-heart {
        font-size: var(--font-size-2xl);
    }
}

@media (max-width: 480px) {
    .popup-modal {
        padding: var(--spacing-lg);
        margin: var(--spacing-md);
    }
    
    .popup-title {
        font-size: var(--font-size-large);
    }
    
    .popup-description {
        font-size: var(--font-size-base);
    }
    
    .popup-heart {
        font-size: var(--font-size-xl);
    }
} 

/* University Recommender Styles */
.filters-section {
    background: var(--surface-color);
    border-radius: var(--border-radius-xl);
    box-shadow: var(--shadow-md);
    padding: var(--spacing-2xl);
    margin-bottom: var(--spacing-2xl);
    animation: fadeInUp 0.8s ease-out;
}

.filters-container {
    max-width: 1000px;
    margin: 0 auto;
}

.filter-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-xl);
}

.filter-group {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
    animation: fadeInLeft 0.6s ease-out;
    animation-fill-mode: both;
}

.filter-group:nth-child(1) { animation-delay: 0.1s; }
.filter-group:nth-child(2) { animation-delay: 0.2s; }
.filter-group:nth-child(3) { animation-delay: 0.3s; }
.filter-group:nth-child(4) { animation-delay: 0.4s; }

.filter-group label {
    font-weight: 600;
    color: var(--text-primary);
    font-size: var(--font-size-base);
}

.filter-input {
    padding: var(--spacing-sm) var(--spacing-md);
    border: 2px solid var(--border-color);
    border-radius: var(--border-radius-sm);
    font-size: var(--font-size-base);
    transition: var(--transition-fast);
    background: var(--surface-color);
}

.filter-input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(74, 144, 226, 0.1);
    transform: scale(1.02);
    box-shadow: 0 8px 20px rgba(102, 126, 234, 0.3);
}

.radio-group {
    display: flex;
    gap: var(--spacing-lg);
    flex-wrap: wrap;
}

.radio-label {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    cursor: pointer;
    font-size: var(--font-size-base);
    color: var(--text-primary);
}

.radio-input {
    display: none;
}

.radio-custom {
    width: 18px;
    height: 18px;
    border: 2px solid var(--border-color);
    border-radius: 50%;
    position: relative;
    transition: var(--transition-fast);
}

.radio-input:checked + .radio-custom {
    border-color: var(--primary-color);
    background: var(--primary-color);
    transform: scale(1.02);
    box-shadow: 0 8px 20px rgba(102, 126, 234, 0.3);
}

.radio-input:checked + .radio-custom::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 8px;
    height: 8px;
    background: white;
    border-radius: 50%;
}

.filter-actions {
    display: flex;
    gap: var(--spacing-md);
    justify-content: center;
    margin-top: var(--spacing-xl);
    animation: fadeInUp 0.8s ease-out;
    animation-delay: 0.5s;
    animation-fill-mode: both;
}

.btn-small {
    padding: var(--spacing-xs) var(--spacing-md);
    font-size: var(--font-size-small);
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.btn-small::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    background: rgba(255, 255, 255, 0.3);
    border-radius: 50%;
    transform: translate(-50%, -50%);
    transition: width 0.3s ease, height 0.3s ease;
}

.btn-small:hover::before {
    width: 300px;
    height: 300px;
}

.btn-small:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.2);
}

/* Results Section */
.results-section {
    background: var(--surface-color);
    border-radius: var(--border-radius-xl);
    box-shadow: var(--shadow-md);
    padding: var(--spacing-2xl);
    margin-bottom: var(--spacing-2xl);
}

.universities-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
    gap: var(--spacing-xl);
    margin-top: var(--spacing-xl);
}

.university-card {
    background: var(--background-color);
    border-radius: var(--border-radius-lg);
    padding: var(--spacing-xl);
    box-shadow: var(--shadow-sm);
    transition: var(--transition-normal);
    border: 1px solid var(--border-color);
    animation: slideInUp 0.6s ease-out;
    animation-fill-mode: both;
}

.university-card:nth-child(1) { animation-delay: 0.1s; }
.university-card:nth-child(2) { animation-delay: 0.2s; }
.university-card:nth-child(3) { animation-delay: 0.3s; }
.university-card:nth-child(4) { animation-delay: 0.4s; }
.university-card:nth-child(5) { animation-delay: 0.5s; }
.university-card:nth-child(6) { animation-delay: 0.6s; }

.university-card:hover {
    box-shadow: var(--shadow-md);
    transform: translateY(-8px) scale(1.02);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.15);
}

.university-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: var(--spacing-md);
}

.university-name {
    font-size: var(--font-size-xl);
    font-weight: 700;
    color: var(--primary-color);
    margin: 0;
    line-height: 1.3;
}

.university-type {
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--border-radius-sm);
    font-size: var(--font-size-small);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.university-type.public {
    background: rgba(39, 174, 96, 0.1);
    color: var(--success-color);
}

.university-type.private {
    background: rgba(155, 89, 182, 0.1);
    color: var(--accent-color);
}

.university-location {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-md);
    color: var(--text-secondary);
    font-size: var(--font-size-base);
}

.location-icon {
    font-size: var(--font-size-large);
}

.university-programs {
    margin-bottom: var(--spacing-lg);
    padding: var(--spacing-md);
    background: rgba(74, 144, 226, 0.05);
    border-radius: var(--border-radius-sm);
    border-left: 4px solid var(--primary-color);
}

.university-programs strong {
    color: var(--primary-color);
}

.university-requirements {
    margin-bottom: var(--spacing-lg);
}

.requirement-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-sm) 0;
    border-bottom: 1px solid var(--border-color);
}

.requirement-item:last-child {
    border-bottom: none;
}

.requirement-label {
    font-weight: 500;
    color: var(--text-secondary);
    font-size: var(--font-size-small);
}

.requirement-value {
    font-weight: 600;
    color: var(--text-primary);
    font-size: var(--font-size-small);
}

.requirement-value.required {
    color: var(--success-color);
}

.requirement-value.not-required {
    color: var(--warning-color);
}

.requirement-value.recognized {
    color: var(--success-color);
}

.requirement-value.not-recognized {
    color: var(--error-color);
}

.university-actions {
    display: flex;
    justify-content: center;
}

/* Responsive Design for Recommender */
@media (max-width: 768px) {
    .filter-row {
        grid-template-columns: 1fr;
        gap: var(--spacing-lg);
    }
    
    .radio-group {
        flex-direction: column;
        gap: var(--spacing-sm);
    }
    
    .filter-actions {
        flex-direction: column;
        align-items: center;
    }
    
    .universities-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-lg);
    }
    
    .university-card {
        padding: var(--spacing-lg);
    }
    
    .university-header {
        flex-direction: column;
        gap: var(--spacing-sm);
        align-items: flex-start;
    }
    
    .university-type {
        align-self: flex-start;
    }
}

@media (max-width: 480px) {
    .filters-section,
    .results-section {
        padding: var(--spacing-lg);
    }
    
    .university-card {
        padding: var(--spacing-md);
    }
    
    .university-name {
        font-size: var(--font-size-large);
    }
    
    .filter-actions .btn {
        width: 100%;
        max-width: 300px;
    }
}

/* Animation Keyframes for University Recommender */
@keyframes slideInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeInLeft {
    from {
        opacity: 0;
        transform: translateX(-20px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes pulse {
    0%, 100% {
        transform: scale(1);
    }
    50% {
        transform: scale(1.05);
    }
}

.university-card.loading {
    animation: pulse 1.5s ease-in-out infinite;
}