:root {
    /* Brand / Primary */
    --primary-color: #35BCBF;        /* Vibrant Teal */
    --primary-dark: #0D2C2E;         /* Deep Dark Teal (hover, header) */
    --primary-light: #B8EDEC;        /* Soft Mint Teal */

    /* Accent */
    --accent-primary: #F4D049;       /* Warm Golden Yellow (CTA) */
    --accent-secondary: #B8EDEC;     /* Mint (tags, highlights) */

    /* Text */
    --text-primary: #0D2C2E;         /* Deep Dark Teal — strong & readable */
    --text-secondary: #2A6E71;       /* Mid Teal Grey */
    --text-muted: #6AAFB2;           /* Soft Teal Muted */

    /* Backgrounds */
    --bg-primary: #F9FEFD;           /* Near White with cool tint */
    --bg-secondary: #EEF9F9;         /* Very light teal wash */
    --bg-tertiary: #B8EDEC;          /* Mint Teal surface */

    /* Borders */
    --border-color: #C8E9E9;

    /* Shadows */
    --shadow-sm: 0 1px 3px rgba(13, 44, 46, 0.06);
    --shadow-md: 0 4px 12px rgba(13, 44, 46, 0.10);
    --shadow-lg: 0 12px 28px rgba(13, 44, 46, 0.14);

    /* Gradients */
    --gradient-primary: linear-gradient(135deg, #0D2C2E 0%, #35BCBF 100%);
    --gradient-accent: linear-gradient(135deg, #35BCBF 0%, #F4D049 100%);
}

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

body {
    font-family: 'Poppins', sans-serif;
    color: var(--text-primary);
    line-height: 1.6;
    background-color: var(--bg-primary);
    overflow-x: hidden;
}

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

/* Navbar */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border-color);
    z-index: 1000;
    padding: 1rem 0;
}

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

.logo {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    /* font-family: 'Space Mono', monospace; */
    font-size: 1.2rem;
    font-weight: 700;
    /* color: var(--text-primary); */
}

.logo img {
    height: 60px;
    /* div ke according adjust kar sakti ho */
    width: auto;
    object-fit: contain;
}

.logo-icon {
    font-size: 2rem;
    animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {

    0%,
    100% {
        transform: scale(1);
    }

    50% {
        transform: scale(1.1);
    }
}

.logo-text {
    background:#2A6E71 ;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    font-family: 'Cormorant Garamond', serif;;
}

/* Buttons */
.btn-primary {
    background: #F84E9D;
    color: white;
    border: none;
    padding: 0.75rem 2rem;
    border-radius: 8px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: var(--shadow-md);
}

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

.btn-full {
    width: 100%;
    padding: 1rem;
}

.btn-secondary {
    background: var(--bg-tertiary);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
    padding: 0.75rem 2rem;
    border-radius: 8px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
}

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

/* Hero Section */
.hero {
    position: relative;
    min-height: 90vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 6rem 2rem 4rem;
    overflow: hidden;
}

.hero-bg {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, #667eea20 0%, #764ba220 100%);
    z-index: -1;
}

.hero-bg::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -20%;
    width: 800px;
    height: 800px;
    background: radial-gradient(circle, rgba(102, 126, 234, 0.15) 0%, transparent 70%);
    border-radius: 50%;
    animation: float 20s ease-in-out infinite;
}

.hero-bg::after {
    content: '';
    position: absolute;
    bottom: -50%;
    left: -20%;
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(118, 75, 162, 0.15) 0%, transparent 70%);
    border-radius: 50%;
    animation: float 15s ease-in-out infinite reverse;
}

@keyframes float {

    0%,
    100% {
        transform: translate(0, 0);
    }

    50% {
        transform: translate(50px, 50px);
    }
}

.hero-content {
    text-align: center;
    max-width: 900px;
    position: relative;
    z-index: 1;
}

.hero-title {
    font-size: 4rem;
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: 1.5rem;
}

.title-line {
    display: block;
}

.gradient-text {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--text-secondary);
    margin-bottom: 3rem;
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
}

.hero-stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 2rem;
    margin-top: 4rem;
}

.stat-card {
    background: white;
    padding: 2rem;
    border-radius: 16px;
    box-shadow: var(--shadow-lg);
    transition: transform 0.3s ease;
}

.stat-card:hover {
    transform: translateY(-5px);
}

.stat-number {
    font-size: 3rem;
    font-weight: 700;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.stat-label {
    font-size: 1rem;
    color: var(--text-secondary);
    margin-top: 0.5rem;
}

/* Features Section */
.features {
    padding: 6rem 0;
    background: var(--bg-secondary);
}

.section-title {
    text-align: center;
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 3rem;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
}

.feature-card {
    background: white;
    padding: 2.5rem;
    border-radius: 16px;
    box-shadow: var(--shadow-md);
    transition: all 0.3s ease;
}

.feature-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-xl);
}

.feature-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.feature-card h3 {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 1rem;
}

.feature-card p {
    color: var(--text-secondary);
    line-height: 1.6;
}

/* Subjects Section */
.subjects {
    padding: 6rem 0;
}

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

.subject-item {
    background: white;
    padding: 1.5rem;
    border-radius: 12px;
    border: 2px solid var(--border-color);
    text-align: center;
    font-weight: 600;
    transition: all 0.3s ease;
    cursor: pointer;
}

.subject-item:hover {
    border-color: var(--primary-color);
    background: var(--bg-secondary);
    transform: translateY(-2px);
}

/* Footer */
.footer {
    background: var(--text-primary);
    color: white;
    padding: 4rem 0 2rem;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 3rem;
    margin-bottom: 3rem;
}

.footer-section h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
}

.footer-section h4 {
    font-size: 1.25rem;
    margin-bottom: 1rem;
}

.footer-section p {
    color: rgba(255, 255, 255, 0.7);
    margin-bottom: 0.5rem;
}

.footer-section ul {
    list-style: none;
}

.footer-section ul li {
    margin-bottom: 0.5rem;
}

.footer-section a {
    color: rgba(255, 255, 255, 0.7);
    text-decoration: none;
    transition: color 0.3s ease;
}

.footer-section a:hover {
    color: white;
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding-top: 2rem;
    text-align: center;
    color: rgba(255, 255, 255, 0.5);
}

/* Modal */
.modal {
    display: none;
    position: fixed;
    z-index: 2000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.7);
    backdrop-filter: blur(5px);
    overflow-y: auto;
}

.modal-content {
    background-color: white;
    margin: 2% auto;
    padding: 3rem;
    border-radius: 20px;
    width: 90%;
    max-width: 700px;
    box-shadow: var(--shadow-xl);
    animation: slideIn 0.3s ease;
}

.modal-small {
    max-width: 450px;
}

@keyframes slideIn {
    from {
        transform: translateY(-50px);
        opacity: 0;
    }

    to {
        transform: translateY(0);
        opacity: 1;
    }
}

.close {
    color: var(--text-secondary);
    float: right;
    font-size: 2rem;
    font-weight: bold;
    cursor: pointer;
    line-height: 1;
}

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

.modal h2 {
    margin-bottom: 2rem;
    font-size: 2rem;
}

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

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 600;
    color: var(--text-primary);
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 0.875rem;
    border: 2px solid var(--border-color);
    border-radius: 8px;
    font-size: 1rem;
    font-family: 'Poppins', sans-serif;
    transition: border-color 0.3s ease;
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-color);
}

.subjects-checkbox {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 0.75rem;
    margin-top: 1rem;
}

.subjects-checkbox label {
    display: flex;
    align-items: center;
    padding: 0.75rem;
    background: var(--bg-secondary);
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.3s ease;
    font-weight: 400;
}

.subjects-checkbox label:hover {
    background: var(--bg-tertiary);
}

.subjects-checkbox input[type="checkbox"] {
    margin-right: 0.5rem;
    width: auto;
    cursor: pointer;
}

.subjects-checkbox input[type="checkbox"]:checked+span {
    font-weight: 600;
}

.subjects-checkbox label input {
    width: 18px;
    height: 18px;
}

/* Payment Summary */
.payment-summary {
    background: var(--bg-secondary);
    padding: 2rem;
    border-radius: 12px;
    margin: 2rem 0;
}

.payment-summary h3 {
    margin-bottom: 1.5rem;
    font-size: 1.5rem;
}

.summary-row {
    display: flex;
    justify-content: space-between;
    padding: 0.75rem 0;
    border-bottom: 1px solid var(--border-color);
}

.summary-row:last-child {
    border-bottom: none;
}

.summary-row.total {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--primary-color);
    border-top: 2px solid var(--primary-color);
    padding-top: 1rem;
    margin-top: 0.5rem;
}

.selected-subjects-list {
    margin-top: 1.5rem;
}

.selected-subjects-list ul {
    list-style: none;
    margin-top: 0.5rem;
}

.selected-subjects-list li {
    padding: 0.5rem 0;
    padding-left: 1.5rem;
    position: relative;
}

.selected-subjects-list li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--secondary-color);
    font-weight: bold;
}

.form-footer {
    text-align: center;
    margin-top: 1rem;
    color: var(--text-secondary);
}

.form-footer a {
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 600;
}

.form-footer a:hover {
    text-decoration: underline;
}

/* Dashboard Styles */
.dashboard-container {
    min-height: 100vh;
    background: var(--bg-secondary);
    padding-top: 80px;
}

.dashboard-header {
    background: white;
    padding: 2rem;
    border-radius: 16px;
    margin: 2rem auto;
    max-width: 1200px;
    box-shadow: var(--shadow-md);
}

.dashboard-header h1 {
    font-size: 2rem;
    margin-bottom: 0.5rem;
}

.dashboard-header p {
    color: var(--text-secondary);
}

.dashboard-content {
    max-width: 1200px;
    margin: 0 auto;
    padding: 2rem;
}

.subjects-dashboard {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 2rem;
}

.subject-card {
    background: white;
    padding: 2rem;
    border-radius: 16px;
    box-shadow: var(--shadow-md);
    transition: all 0.3s ease;
    cursor: pointer;
}

.subject-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-xl);
}

.subject-card h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
}

.subject-card .progress {
    margin-top: 1rem;
}

.progress-bar {
    height: 8px;
    background: var(--bg-tertiary);
    border-radius: 4px;
    overflow: hidden;
}

.progress-fill {
    height: 100%;
    background: var(--gradient-primary);
    border-radius: 4px;
    transition: width 0.3s ease;
}

.progress-text {
    font-size: 0.875rem;
    color: var(--text-secondary);
    margin-top: 0.5rem;
}

/* Subject Page */
.subject-page {
    max-width: 1200px;
    margin: 0 auto;
    padding: 2rem;
}

.back-button {
    background: var(--bg-tertiary);
    color: var(--text-primary);
    border: none;
    padding: 0.75rem 1.5rem;
    border-radius: 8px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    margin-bottom: 2rem;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
}

.back-button:hover {
    background: var(--border-color);
}

.worksheets-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
    gap: 2rem;
    margin-top: 2rem;
}

.worksheet-card {
    background: white;
    padding: 2rem;
    border-radius: 16px;
    box-shadow: var(--shadow-md);
}

.worksheet-card h3 {
    font-size: 1.25rem;
    margin-bottom: 1rem;
}

.worksheet-actions {
    display: flex;
    gap: 1rem;
    margin-top: 1.5rem;
}

.btn-view {
    flex: 1;
    padding: 0.75rem;
    background: var(--primary-color);
    color: white;
    border: none;
    border-radius: 8px;
    font-weight: 600;
    cursor: pointer;
}

.btn-upload {
    flex: 1;
    padding: 0.75rem;
    background: var( --accent-primary);
    color: black;
    border: none;
    border-radius: 8px;
    font-weight: 600;
    cursor: pointer;
}

.upload-input {
    display: none;
}

.submission-status {
    margin-top: 1rem;
    padding: 0.75rem;
    background: var(--bg-secondary);
    border-radius: 8px;
    font-size: 0.875rem;
}

.submission-status.completed {
    background: rgba(16, 185, 129, 0.1);
    color: var(--secondary-color);
}

/* Admin Dashboard */
.admin-container {
    min-height: 100vh;
    background: var(--bg-secondary);
    padding-top: 80px;
}

.admin-stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    max-width: 1200px;
    margin: 2rem auto;
    padding: 0 2rem;
}

.admin-stat-card {
    background: white;
    padding: 2rem;
    border-radius: 16px;
    box-shadow: var(--shadow-md);
}

.admin-stat-card h3 {
    font-size: 0.875rem;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 0.5rem;
}

.admin-stat-card .number {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--primary-color);
}

.students-table {
    max-width: 1200px;
    margin: 2rem auto;
    padding: 0 2rem;
}

.table-container {
    background: white;
    border-radius: 16px;
    box-shadow: var(--shadow-md);
    overflow: hidden;
}

.table-container h2 {
    padding: 2rem;
    border-bottom: 1px solid var(--border-color);
}

table {
    width: 100%;
    border-collapse: collapse;
}

thead {
    background: var(--bg-secondary);
}

th,
td {
    padding: 1rem;
    text-align: left;
    border-bottom: 1px solid var(--border-color);
}

th {
    font-weight: 600;
    color: var(--text-secondary);
    text-transform: uppercase;
    font-size: 0.875rem;
    letter-spacing: 0.5px;
}

tr:hover {
    background: var(--bg-secondary);
}

/* Responsive Design */
@media (max-width: 768px) {
    .hero-title {
        font-size: 2.5rem;
    }

    .hero-subtitle {
        font-size: 1rem;
    }

    .subjects-checkbox {
        grid-template-columns: 1fr;
    }

    .modal-content {
        padding: 2rem 1.5rem;
        width: 95%;
    }

    .features-grid,
    .subjects-grid,
    .subjects-dashboard,
    .worksheets-grid {
        grid-template-columns: 1fr;
    }
}

/* Loading Animation */
.loading {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 3px solid rgba(255, 255, 255, 0.3);
    border-radius: 50%;
    border-top-color: white;
    animation: spin 1s ease-in-out infinite;
}

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

/* Success Message */
.success-message {
    background: rgba(16, 185, 129, 0.1);
    color: var(--secondary-color);
    padding: 1rem;
    border-radius: 8px;
    margin: 1rem 0;
    text-align: center;
    font-weight: 600;
}

.error-message {
    background: rgba(239, 68, 68, 0.1);
    color: #ef4444;
    padding: 1rem;
    border-radius: 8px;
    margin: 1rem 0;
    text-align: center;
    font-weight: 600;
}