/* CSS Variables */
:root {
    --primary-color: #2575fc;
    --secondary-color: #6a11cb;
    --success-color: #28a745;
    --warning-color: #ffc107;
    --danger-color: #dc3545;
    --info-color: #17a2b8;
    --light-color: #f8f9fa;
    --dark-color: #343a40;
    --border-radius: 8px;
    --box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    --transition: all 0.3s ease;
    --bg-color: #ffffff;
    --text-color: #333333;
    --card-bg: #ffffff;
    --border-color: #e0e0e0;
    --hover-bg: #f5f5f5;
}

/* Dark Mode Variables */
[data-theme="dark"] {
    --bg-color: #1a1a2e;
    --text-color: #e0e0e0;
    --card-bg: #16213e;
    --border-color: #0f3460;
    --hover-bg: #0f3460;
    --light-color: #16213e;
    --dark-color: #e0e0e0;
}

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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    color: var(--text-color);
    background-color: var(--bg-color);
    overflow-x: hidden;
    transition: var(--transition);
}

.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Warning Modal Styles */
#warning-modal {
    display: flex;
    position: fixed;
    z-index: 9999;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.7);
    animation: fadeIn 0.3s ease-in;
}

#warning-modal .modal-content {
    background-color: var(--card-bg);
    margin: 10% auto;
    padding: 0;
    border-radius: var(--border-radius);
    width: 90%;
    max-width: 500px;
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.3);
    animation: slideIn 0.5s ease-out;
    border: 1px solid var(--border-color);
}

#warning-modal .modal-header {
    display: flex;
    align-items: center;
    padding: 1.5rem;
    border-bottom: 1px solid var(--border-color);
    background: linear-gradient(135deg, var(--warning-color) 0%, #ff8c00 100%);
    color: white;
    border-top-left-radius: var(--border-radius);
    border-top-right-radius: var(--border-radius);
}

#warning-modal .modal-header h3 {
    margin: 0;
    font-size: 1.3rem;
    display: flex;
    align-items: center;
    gap: 10px;
}

#warning-modal .modal-body {
    padding: 2rem;
    color: var(--text-color);
}

#warning-modal .modal-body p {
    margin-bottom: 1rem;
    line-height: 1.6;
}

#warning-modal .modal-body p:first-child {
    font-weight: bold;
    color: var(--warning-color);
    font-size: 1.1rem;
}

.checkbox-container {
    margin-top: 1.5rem;
    display: flex;
    align-items: center;
    gap: 10px;
}

.checkbox-container input[type="checkbox"] {
    width: 18px;
    height: 18px;
    cursor: pointer;
}

.checkbox-container label {
    cursor: pointer;
    font-weight: 500;
}

#warning-modal .modal-footer {
    padding: 1rem 1.5rem;
    border-top: 1px solid var(--border-color);
    text-align: right;
    background: var(--light-color);
    border-bottom-left-radius: var(--border-radius);
    border-bottom-right-radius: var(--border-radius);
}

#warning-modal #accept-warning {
    padding: 10px 20px;
    font-size: 1rem;
}

#warning-modal #accept-warning:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

/* Header Styles */
header {
    background: linear-gradient(135deg, var(--secondary-color) 0%, var(--primary-color) 100%);
    color: white;
    padding: 1rem 0;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    position: sticky;
    top: 0;
    z-index: 1000;
}

header .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
}

.logo i {
    font-size: 2rem;
    animation: pulse 2s infinite;
}

.logo h1 {
    font-size: 1.5rem;
    font-weight: 600;
}

.nav-links {
    display: flex;
    list-style: none;
    gap: 20px;
}

.nav-link {
    color: white;
    text-decoration: none;
    padding: 8px 16px;
    border-radius: 4px;
    transition: var(--transition);
    font-weight: 500;
    position: relative;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    width: 0;
    height: 2px;
    background-color: white;
    transform: translateX(-50%);
    transition: width 0.3s ease;
}

.nav-link:hover::after,
.nav-link.active::after {
    width: 80%;
}

.nav-link:hover, .nav-link.active {
    background-color: rgba(255, 255, 255, 0.2);
}

.header-actions {
    display: flex;
    align-items: center;
    gap: 15px;
}

.theme-toggle {
    background: none;
    border: none;
    color: white;
    font-size: 1.2rem;
    cursor: pointer;
    padding: 8px;
    border-radius: 50%;
    transition: var(--transition);
}

.theme-toggle:hover {
    background-color: rgba(255, 255, 255, 0.2);
    transform: rotate(20deg);
}

.mobile-menu-toggle {
    display: none;
    font-size: 1.5rem;
    cursor: pointer;
}

/* Quick Stats Dashboard */
.quick-stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
    margin: 2rem 0;
}

.stat-card {
    background: var(--card-bg);
    padding: 1.5rem;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    display: flex;
    align-items: center;
    gap: 15px;
    transition: var(--transition);
    border: 1px solid var(--border-color);
}

.stat-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 15px rgba(0, 0, 0, 0.2);
}

.stat-card i {
    font-size: 2.5rem;
    color: var(--primary-color);
    animation: float 3s ease-in-out infinite;
}

.stat-info h3 {
    font-size: 0.9rem;
    color: var(--text-color);
    margin-bottom: 5px;
    opacity: 0.8;
}

.stat-info span {
    font-size: 1.8rem;
    font-weight: bold;
    color: var(--text-color);
}

/* Grade Reference */
.grade-reference {
    background: var(--card-bg);
    border-radius: var(--border-radius);
    padding: 1.5rem;
    margin-bottom: 2rem;
    box-shadow: var(--box-shadow);
    border: 1px solid var(--border-color);
}

.grade-reference h2 {
    margin-bottom: 1rem;
    color: var(--primary-color);
}

.grade-table {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 15px;
}

.grade-row {
    display: flex;
    flex-direction: column;
    padding: 12px;
    border-radius: var(--border-radius);
    background-color: var(--light-color);
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.05);
    transition: var(--transition);
    border: 1px solid var(--border-color);
}

.grade-row:hover {
    transform: translateY(-3px);
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
}

.grade-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 8px;
}

.grade {
    font-weight: bold;
    font-size: 1.2rem;
    text-align: center;
    background-color: var(--primary-color);
    color: white;
    border-radius: 50%;
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.grade-points {
    font-weight: bold;
    font-size: 1.1rem;
    color: var(--primary-color);
}

.grade-details {
    display: flex;
    flex-direction: column;
    gap: 5px;
}

.grade-desc {
    font-weight: 500;
    color: var(--text-color);
}

.grade-range {
    font-size: 0.9rem;
    color: var(--text-color);
    background-color: rgba(37, 117, 252, 0.1);
    padding: 4px 8px;
    border-radius: 4px;
    text-align: center;
}

/* Calculator Tabs */
.calculator-tab {
    display: none;
}

.calculator-tab.active {
    display: block;
    animation: fadeIn 0.5s ease-in;
}

.tab-nav {
    display: flex;
    gap: 10px;
    margin-bottom: 20px;
    flex-wrap: wrap;
}

.tab-btn {
    padding: 10px 20px;
    border: none;
    background: var(--card-bg);
    color: var(--text-color);
    border-radius: var(--border-radius);
    cursor: pointer;
    transition: var(--transition);
    font-weight: 500;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
    border: 1px solid var(--border-color);
}

.tab-btn:hover {
    background: var(--hover-bg);
    transform: translateY(-2px);
}

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

.calculator-content {
    display: none;
}

.calculator-content.active {
    display: block;
    animation: fadeIn 0.5s ease-in;
}

.calculator-card {
    background: var(--card-bg);
    border-radius: var(--border-radius);
    padding: 2rem;
    box-shadow: var(--box-shadow);
    margin-bottom: 2rem;
    border: 1px solid var(--border-color);
}

.calculator-card h2 {
    margin-bottom: 0.5rem;
    color: var(--primary-color);
    display: flex;
    align-items: center;
    gap: 10px;
}

.calculator-card p {
    margin-bottom: 1.5rem;
    color: var(--text-color);
    opacity: 0.8;
}

/* Form Styles */
.form-container {
    margin-bottom: 1.5rem;
}

.form-group {
    margin-bottom: 1.5rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
    color: var(--text-color);
}

input, select {
    width: 100%;
    padding: 12px;
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    font-size: 1rem;
    transition: var(--transition);
    background-color: var(--card-bg);
    color: var(--text-color);
}

input:focus, select:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 2px rgba(37, 117, 252, 0.2);
}

/* Subject/Semester Rows */
.subject-row, .semester-row, .backlog-row, .scenario-row {
    display: grid;
    grid-template-columns: 1fr 1fr auto;
    gap: 15px;
    margin-bottom: 15px;
    padding: 15px;
    background-color: var(--light-color);
    border-radius: var(--border-radius);
    position: relative;
    border: 1px solid var(--border-color);
    transition: var(--transition);
}

.subject-row:hover, .semester-row:hover, .backlog-row:hover, .scenario-row:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
}

.remove-btn {
    background-color: var(--danger-color);
    color: white;
    border: none;
    border-radius: 50%;
    width: 30px;
    height: 30px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: var(--transition);
    align-self: center;
}

.remove-btn:hover {
    background-color: #c82333;
    transform: rotate(90deg);
}

/* Buttons */
.form-actions {
    display: flex;
    gap: 15px;
    margin-top: 1.5rem;
    flex-wrap: wrap;
}

.btn {
    padding: 12px 20px;
    border: none;
    border-radius: var(--border-radius);
    font-size: 1rem;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    gap: 8px;
    position: relative;
    overflow: hidden;
}

.btn::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.2);
    transform: translate(-50%, -50%);
    transition: width 0.6s, height 0.6s;
}

.btn:active::before {
    width: 300px;
    height: 300px;
}

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

.btn-primary:hover {
    background-color: #1a5fc9;
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(37, 117, 252, 0.3);
}

.btn-secondary {
    background-color: #6c757d;
    color: white;
}

.btn-secondary:hover {
    background-color: #5a6268;
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(108, 117, 125, 0.3);
}

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

.btn-info:hover {
    background-color: #138496;
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(23, 162, 184, 0.3);
}

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

.btn-success:hover {
    background-color: #218838;
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(40, 167, 69, 0.3);
}

.btn-warning {
    background-color: var(--warning-color);
    color: var(--dark-color);
}

.btn-warning:hover {
    background-color: #e0a800;
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(255, 193, 7, 0.3);
}

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

.btn-danger:hover {
    background-color: #c82333;
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(220, 53, 69, 0.3);
}

/* Results */
.result-container {
    margin-top: 2rem;
    padding: 1.5rem;
    background-color: var(--light-color);
    border-radius: var(--border-radius);
    border-left: 4px solid var(--primary-color);
    border: 1px solid var(--border-color);
    animation: slideIn 0.5s ease-out;
}

.result-container.hidden {
    display: none;
}

.result-score {
    font-size: 2rem;
    font-weight: bold;
    color: var(--primary-color);
    margin-bottom: 1rem;
}

.calculation-steps {
    margin-top: 1.5rem;
}

.calculation-steps h3 {
    margin-bottom: 1rem;
    color: var(--text-color);
}

.step {
    margin-bottom: 0.8rem;
    padding: 0.8rem;
    background-color: var(--card-bg);
    border-radius: var(--border-radius);
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.05);
    border: 1px solid var(--border-color);
    transition: var(--transition);
}

.step:hover {
    transform: translateX(5px);
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
}

.step-formula {
    font-family: 'Courier New', monospace;
    background-color: var(--hover-bg);
    padding: 0.5rem;
    border-radius: var(--border-radius);
    margin-top: 0.5rem;
    overflow-x: auto;
}

/* Analytics */
.analytics-container {
    display: grid;
    grid-template-columns: 1fr;
    gap: 20px;
}

.analytics-card {
    background: var(--card-bg);
    border-radius: var(--border-radius);
    padding: 2rem;
    box-shadow: var(--box-shadow);
    border: 1px solid var(--border-color);
}

.chart-container {
    margin: 2rem 0;
    padding: 1rem;
    background: var(--light-color);
    border-radius: var(--border-radius);
    border: 1px solid var(--border-color);
}

.export-section {
    display: flex;
    gap: 15px;
    margin-top: 2rem;
    flex-wrap: wrap;
}

/* Prediction */
.prediction-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
}

.prediction-card, .study-priority-card {
    background: var(--card-bg);
    border-radius: var(--border-radius);
    padding: 2rem;
    box-shadow: var(--box-shadow);
    border: 1px solid var(--border-color);
}

.priority-list {
    margin-top: 1.5rem;
}

.priority-item {
    display: flex;
    align-items: center;
    padding: 1rem;
    margin-bottom: 10px;
    background: var(--light-color);
    border-radius: var(--border-radius);
    border-left: 4px solid var(--primary-color);
    border: 1px solid var(--border-color);
    transition: var(--transition);
}

.priority-item:hover {
    transform: translateX(5px);
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
}

.priority-number {
    font-size: 1.5rem;
    font-weight: bold;
    color: var(--primary-color);
    margin-right: 15px;
    min-width: 30px;
}

/* Goals */
.goals-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
}

.goals-card, .scholarship-card {
    background: var(--card-bg);
    border-radius: var(--border-radius);
    padding: 2rem;
    box-shadow: var(--box-shadow);
    border: 1px solid var(--border-color);
}

.goal-form {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 15px;
    margin-bottom: 2rem;
}

.goals-list {
    max-height: 400px;
    overflow-y: auto;
}

.goal-item {
    padding: 1rem;
    margin-bottom: 10px;
    background: var(--light-color);
    border-radius: var(--border-radius);
    border: 1px solid var(--border-color);
    transition: var(--transition);
}

.goal-item:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
}

.goal-progress-bar {
    width: 100%;
    height: 8px;
    background: var(--border-color);
    border-radius: 4px;
    margin-top: 10px;
    overflow: hidden;
}

.goal-progress-fill {
    height: 100%;
    background: var(--success-color);
    transition: width 0.3s ease;
}

.scholarship-item {
    padding: 1rem;
    margin-bottom: 10px;
    background: var(--light-color);
    border-radius: var(--border-radius);
    border: 1px solid var(--border-color);
    transition: var(--transition);
}

.scholarship-item:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
}

.scholarship-status {
    display: inline-block;
    padding: 4px 8px;
    border-radius: 4px;
    font-size: 0.8rem;
    font-weight: bold;
}

.scholarship-eligible {
    background: var(--success-color);
    color: white;
}

.scholarship-not-eligible {
    background: var(--danger-color);
    color: white;
}

/* Insights */
.insights-container {
    display: grid;
    grid-template-columns: 1fr;
    gap: 20px;
}

.insights-card {
    background: var(--card-bg);
    border-radius: var(--border-radius);
    padding: 2rem;
    box-shadow: var(--box-shadow);
    border: 1px solid var(--border-color);
}

.insight-item {
    padding: 1rem;
    margin-bottom: 15px;
    background: var(--light-color);
    border-radius: var(--border-radius);
    border-left: 4px solid var(--info-color);
    border: 1px solid var(--border-color);
    transition: var(--transition);
}

.insight-item:hover {
    transform: translateX(5px);
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
}

.recommendations {
    margin-top: 2rem;
}

.recommendation-item {
    display: flex;
    align-items: flex-start;
    padding: 1rem;
    margin-bottom: 10px;
    background: var(--light-color);
    border-radius: var(--border-radius);
    border: 1px solid var(--border-color);
    transition: var(--transition);
}

.recommendation-item:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
}

.recommendation-item i {
    color: var(--primary-color);
    margin-right: 15px;
    margin-top: 3px;
}

/* Achievements */
.achievements-container {
    display: grid;
    grid-template-columns: 1fr;
    gap: 20px;
}

.achievements-card {
    background: var(--card-bg);
    border-radius: var(--border-radius);
    padding: 2rem;
    box-shadow: var(--box-shadow);
    border: 1px solid var(--border-color);
}

.achievements-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
    gap: 20px;
    margin-top: 1.5rem;
}

.achievement-badge {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 1.5rem 1rem;
    background: var(--light-color);
    border-radius: var(--border-radius);
    text-align: center;
    transition: var(--transition);
    border: 1px solid var(--border-color);
    position: relative;
}

.achievement-badge:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 15px rgba(0, 0, 0, 0.2);
}

.achievement-badge.unlocked {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    color: white;
}

.achievement-badge.locked {
    opacity: 0.6;
    filter: grayscale(100%);
}

.achievement-icon {
    font-size: 2.5rem;
    margin-bottom: 10px;
}

.achievement-badge.locked .achievement-icon {
    color: #999;
}

.achievement-badge.unlocked .achievement-icon {
    color: white;
    animation: pulse 2s infinite;
}

.achievement-name {
    font-weight: bold;
    margin-bottom: 5px;
}

.achievement-desc {
    font-size: 0.8rem;
    opacity: 0.8;
}

.achievement-progress {
    width: 100%;
    height: 6px;
    background: var(--border-color);
    border-radius: 3px;
    margin-top: 10px;
    overflow: hidden;
}

.achievement-progress-fill {
    height: 100%;
    background: var(--success-color);
    transition: width 0.3s ease;
}

/* Floating Action Button */
.fab-container {
    position: fixed;
    bottom: 20px;
    right: 20px;
    z-index: 100;
}

.fab {
    width: 56px;
    height: 56px;
    border-radius: 50%;
    background: var(--primary-color);
    color: white;
    border: none;
    box-shadow: 0 3px 5px rgba(0, 0, 0, 0.3);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    transition: var(--transition);
}

.fab:hover {
    background: #1a5fc9;
    transform: scale(1.1);
}

.fab-options {
    position: absolute;
    bottom: 70px;
    right: 0;
    display: flex;
    flex-direction: column;
    gap: 10px;
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px);
    transition: var(--transition);
}

.fab-options.active {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.fab-option {
    background: white;
    color: var(--text-color);
    border: 1px solid var(--border-color);
    border-radius: 50px;
    padding: 12px 20px;
    display: flex;
    align-items: center;
    gap: 10px;
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.2);
    cursor: pointer;
    transition: var(--transition);
    white-space: nowrap;
}

.fab-option:hover {
    background: var(--hover-bg);
    transform: translateX(-5px);
}

/* Notification System */
.notification-container {
    position: fixed;
    top: 20px;
    right: 20px;
    z-index: 1000;
    display: flex;
    flex-direction: column;
    gap: 10px;
    max-width: 350px;
}

.notification {
    background: white;
    color: var(--text-color);
    padding: 15px 20px;
    border-radius: var(--border-radius);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
    display: flex;
    align-items: center;
    gap: 12px;
    animation: slideInRight 0.5s ease-out;
    border-left: 4px solid var(--info-color);
}

.notification.success {
    border-left-color: var(--success-color);
}

.notification.error {
    border-left-color: var(--danger-color);
}

.notification.warning {
    border-left-color: var(--warning-color);
}

.notification i {
    font-size: 1.2rem;
}

.notification.success i {
    color: var(--success-color);
}

.notification.error i {
    color: var(--danger-color);
}

.notification.warning i {
    color: var(--warning-color);
}

.notification.info i {
    color: var(--info-color);
}

/* Modal Styles */
.modal {
    display: none;
    position: fixed;
    z-index: 1000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    animation: fadeIn 0.3s ease-in;
}

.modal-content {
    background-color: var(--card-bg);
    margin: 15% auto;
    padding: 0;
    border-radius: var(--border-radius);
    width: 90%;
    max-width: 500px;
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.3);
    animation: slideIn 0.5s ease-out;
    border: 1px solid var(--border-color);
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.5rem;
    border-bottom: 1px solid var(--border-color);
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    color: white;
    border-top-left-radius: var(--border-radius);
    border-top-right-radius: var(--border-radius);
}

.modal-header h3 {
    margin: 0;
    font-size: 1.3rem;
}

.close-modal {
    color: white;
    font-size: 1.5rem;
    font-weight: bold;
    cursor: pointer;
    transition: var(--transition);
}

.close-modal:hover {
    opacity: 0.7;
}

.modal-body {
    padding: 2rem;
    text-align: center;
}

.achievement-icon {
    font-size: 3rem;
    color: var(--primary-color);
    margin-bottom: 1rem;
}

.modal-body h4 {
    font-size: 1.5rem;
    margin-bottom: 0.5rem;
    color: var(--text-color);
}

.modal-body p {
    color: var(--text-color);
    opacity: 0.8;
}

.modal-footer {
    padding: 1rem 1.5rem;
    border-top: 1px solid var(--border-color);
    text-align: center;
    background: var(--light-color);
    border-bottom-left-radius: var(--border-radius);
    border-bottom-right-radius: var(--border-radius);
}

/* Install Banner */
.install-banner {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    color: white;
    padding: 1rem;
    box-shadow: 0 -2px 10px rgba(0, 0, 0, 0.1);
    z-index: 1000;
    transform: translateY(100%);
    transition: transform 0.3s ease;
}

.install-banner.hidden {
    transform: translateY(100%);
}

.install-banner:not(.hidden) {
    transform: translateY(0);
}

.install-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

.install-content i {
    font-size: 1.5rem;
    margin-right: 15px;
}

/* Footer */
footer {
    background: var(--card-bg);
    padding: 2rem 0;
    margin-top: 4rem;
    border-top: 1px solid var(--border-color);
}

footer .container {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1rem;
}

.footer-links {
    display: flex;
    gap: 20px;
    flex-wrap: wrap;
    justify-content: center;
}

.footer-btn {
    background: none;
    border: none;
    color: var(--text-color);
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 8px 12px;
    border-radius: var(--border-radius);
    transition: var(--transition);
    font-size: 0.9rem;
}

.footer-btn:hover {
    background: var(--hover-bg);
}

/* Animations */
@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

@keyframes slideIn {
    from {
        transform: translateY(-30px);
        opacity: 0;
    }
    to {
        transform: translateY(0);
        opacity: 1;
    }
}

@keyframes slideInRight {
    from {
        transform: translateX(100px);
        opacity: 0;
    }
    to {
        transform: translateX(0);
        opacity: 1;
    }
}

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

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

/* Responsive Design */
@media (max-width: 768px) {
    .nav-links {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: linear-gradient(135deg, var(--secondary-color) 0%, var(--primary-color) 100%);
        flex-direction: column;
        padding: 1rem;
        gap: 0;
        box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
    }
    
    .nav-links.active {
        display: flex;
    }
    
    .nav-link {
        padding: 12px 20px;
        border-radius: 0;
    }
    
    .mobile-menu-toggle {
        display: block;
    }
    
    .quick-stats {
        grid-template-columns: 1fr;
    }
    
    .prediction-container,
    .goals-container {
        grid-template-columns: 1fr;
    }
    
    .form-actions {
        flex-direction: column;
    }
    
    .btn {
        width: 100%;
        justify-content: center;
    }
    
    .export-section {
        flex-direction: column;
    }
    
    .footer-links {
        flex-direction: column;
        align-items: center;
    }
    
    .fab-container {
        bottom: 10px;
        right: 10px;
    }
    
    .notification-container {
        right: 10px;
        left: 10px;
        max-width: none;
    }
    
    .modal-content {
        width: 95%;
        margin: 10% auto;
    }
    
    .install-content {
        flex-direction: column;
        gap: 10px;
        text-align: center;
    }
}

@media (max-width: 480px) {
    .grade-table {
        grid-template-columns: 1fr;
    }
    
    .achievements-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .subject-row, .semester-row, .backlog-row, .scenario-row {
        grid-template-columns: 1fr;
        gap: 10px;
    }
    
    .remove-btn {
        position: absolute;
        top: 10px;
        right: 10px;
    }
    
    .form-group {
        margin-bottom: 1rem;
    }
    
    .calculator-card {
        padding: 1.5rem;
    }
    
    .chart-container {
        padding: 0.5rem;
    }
}