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

:root {
    --primary: #3bb5b5;
    --primary-dark: #2a8a8a;
    --primary-light: #e8f7f7;
    --accent: #662e80;
    --secondary: #64748b;
    --background: #f1f5f9;
    --surface: #ffffff;
    --text: #1e293b;
    --text-light: #64748b;
    --border: #e2e8f0;
    --success: #22c55e;
    --error: #ef4444;
    --radius: 12px;
    --radius-lg: 20px;
    --shadow: 0 1px 3px rgba(0,0,0,0.08), 0 1px 2px rgba(0,0,0,0.06);
    --shadow-md: 0 4px 6px rgba(0,0,0,0.07), 0 2px 4px rgba(0,0,0,0.06);
    --shadow-lg: 0 10px 25px rgba(0,0,0,0.1), 0 6px 10px rgba(0,0,0,0.08);
    --transition: all 0.2s ease;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background-color: var(--background);
    color: var(--text);
    line-height: 1.6;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* Load Inter font */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700;800&display=swap');

/* Navigation */
.navbar {
    background: var(--surface);
    padding: 1rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    box-shadow: var(--shadow);
    position: sticky;
    top: 0;
    z-index: 100;
    backdrop-filter: blur(10px);
    background: rgba(255,255,255,0.95);
}

.nav-brand {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    text-decoration: none;
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--primary-dark);
    letter-spacing: -0.5px;
}

.nav-brand span {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.nav-logo {
    height: 32px;
    width: auto;
}

.nav-links {
    display: flex;
    gap: 2.5rem;
}

.nav-links a {
    text-decoration: none;
    color: var(--text-light);
    font-weight: 500;
    transition: var(--transition);
    position: relative;
    padding: 0.5rem 0;
}

.nav-links a:hover,
.nav-links a.active {
    color: var(--primary);
}

.nav-links a.active::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: var(--primary);
    border-radius: 2px;
}

/* Main Content */
main {
    flex: 1;
    padding: 3rem 2rem;
    max-width: 1200px;
    margin: 0 auto;
    width: 100%;
}

/* Hero Section */
.hero {
    display: flex;
    align-items: center;
    gap: 3rem;
    padding: 4rem;
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 50%, var(--accent) 100%);
    color: white;
    border-radius: var(--radius-lg);
    margin-bottom: 4rem;
    position: relative;
    overflow: hidden;
}

.hero-content {
    flex: 1;
    position: relative;
    z-index: 1;
}

.hero-content h1,
.hero-content p,
.hero-content .btn {
    text-align: left;
}

.hero::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -50%;
    width: 100%;
    height: 200%;
    background: radial-gradient(circle, rgba(255,255,255,0.1) 0%, transparent 60%);
    pointer-events: none;
}

.hero-image {
    width: 220px;
    height: auto;
    border-radius: var(--radius-lg);
    box-shadow: 0 8px 30px rgba(0,0,0,0.2);
    border: 4px solid rgba(255,255,255,0.3);
    flex-shrink: 0;
    position: relative;
    z-index: 1;
}

.hero h1 {
    font-size: 3rem;
    font-weight: 800;
    margin-bottom: 1rem;
    letter-spacing: -1px;
    position: relative;
}

.hero p {
    font-size: 1.25rem;
    opacity: 0.95;
    margin-bottom: 2rem;
    position: relative;
}

/* Buttons */
.btn {
    display: inline-block;
    padding: 0.875rem 2rem;
    border-radius: 50px;
    font-weight: 600;
    text-decoration: none;
    cursor: pointer;
    border: none;
    font-size: 1rem;
    transition: var(--transition);
    letter-spacing: -0.2px;
}

.btn-primary {
    background: white;
    color: var(--primary-dark);
    box-shadow: var(--shadow-md);
}

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

.btn-secondary {
    background: var(--surface);
    color: var(--text);
    border: 2px solid var(--border);
}

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

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

.btn-danger:hover {
    opacity: 0.9;
}

.btn-small {
    padding: 0.5rem 1rem;
    font-size: 0.875rem;
}

.btn-full {
    width: 100%;
}

/* Content Sections */
.content-section {
    background: var(--surface);
    padding: 3rem;
    border-radius: var(--radius-lg);
    margin-bottom: 2rem;
    box-shadow: var(--shadow);
    border: 1px solid var(--border);
}

.content-section h2 {
    font-size: 1.75rem;
    font-weight: 700;
    margin-bottom: 1rem;
    color: var(--text);
}

.content-section p {
    color: var(--text-light);
    font-size: 1.05rem;
    line-height: 1.7;
    margin-bottom: 1rem;
}

.mission-list {
    list-style: none;
    padding: 0;
    margin-top: 1.5rem;
}

.mission-list li {
    padding: 1rem 0 1rem 2rem;
    position: relative;
    color: var(--text);
    font-size: 1.05rem;
    line-height: 1.6;
    border-bottom: 1px solid var(--border);
}

.mission-list li:last-child {
    border-bottom: none;
}

.mission-list li::before {
    content: '→';
    position: absolute;
    left: 0;
    color: var(--primary);
    font-weight: bold;
}

/* How It Works */
.how-it-works {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 1.5rem;
    margin-top: 1.5rem;
}

.how-card {
    background: var(--background);
    padding: 2rem;
    border-radius: var(--radius);
}

.how-card h3 {
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: 1rem;
    color: var(--primary-dark);
}

.how-card p {
    color: var(--text-light);
    margin-bottom: 0;
}

/* Commitment Section */
.commitment .features {
    margin-top: 1.5rem;
    margin-bottom: 0;
}

/* CTA Styles */
.cta-intro {
    font-size: 1.1rem;
    color: var(--text-light);
    margin-bottom: 1rem;
}

.cta-buttons {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
}

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

.cta .btn-primary:hover {
    background: var(--primary-dark);
}

/* Features Section */
.features {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
    margin-bottom: 4rem;
}

.feature {
    background: var(--surface);
    padding: 2.5rem;
    border-radius: var(--radius-lg);
    text-align: center;
    box-shadow: var(--shadow);
    transition: var(--transition);
    border: 1px solid var(--border);
}

.feature:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary-light);
}

.feature-icon {
    font-size: 3rem;
    margin-bottom: 1.25rem;
    display: inline-block;
}

.feature h3 {
    margin-bottom: 0.75rem;
    color: var(--text);
    font-weight: 700;
    font-size: 1.25rem;
}

.feature p {
    color: var(--text-light);
    font-size: 0.95rem;
    line-height: 1.7;
}

/* CTA Section */
.cta {
    text-align: center;
    padding: 4rem;
    background: var(--surface);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow);
    border: 1px solid var(--border);
}

.cta h2 {
    margin-bottom: 0.75rem;
    font-weight: 700;
    font-size: 1.75rem;
}

.cta p {
    color: var(--text-light);
    margin-bottom: 2rem;
    font-size: 1.1rem;
}

/* Tutors Page */
.tutors-header {
    margin-bottom: 2.5rem;
}

.tutors-header h1 {
    margin-bottom: 1.5rem;
    font-size: 2rem;
    font-weight: 700;
}

.filters {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}

.search-input,
.filter-select {
    padding: 0.875rem 1.25rem;
    border: 2px solid var(--border);
    border-radius: 50px;
    font-size: 1rem;
    background: var(--surface);
    transition: var(--transition);
}

.search-input {
    flex: 1;
    min-width: 250px;
}

.filter-select {
    min-width: 160px;
}

.search-input:focus,
.filter-select:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px var(--primary-light);
}

/* Tutors Grid */
.tutors-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 1.5rem;
}

.tutor-card {
    background: var(--surface);
    border-radius: var(--radius-lg);
    padding: 2rem;
    box-shadow: var(--shadow);
    transition: var(--transition);
    border: 1px solid var(--border);
}

.tutor-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary-light);
}

.tutor-header {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 1.25rem;
}

.tutor-avatar {
    width: 56px;
    height: 56px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 1.25rem;
    box-shadow: var(--shadow-md);
}

.tutor-info h3 {
    margin: 0;
    font-size: 1.15rem;
    font-weight: 700;
}

.tutor-levels {
    display: flex;
    flex-wrap: wrap;
    gap: 0.25rem;
    margin-top: 0.25rem;
}

.level-tag {
    background: var(--background);
    color: var(--text-light);
    padding: 0.2rem 0.5rem;
    border-radius: 50px;
    font-size: 0.75rem;
    font-weight: 500;
}

.tutor-subjects {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-bottom: 1.25rem;
}

.subject-tag {
    background: var(--primary-light);
    color: var(--primary-dark);
    padding: 0.375rem 0.875rem;
    border-radius: 50px;
    font-size: 0.85rem;
    font-weight: 600;
}

.tutor-bio {
    color: var(--text-light);
    font-size: 0.95rem;
    margin-bottom: 1.25rem;
    line-height: 1.6;
}

.tutor-contact {
    color: var(--primary-dark);
    text-decoration: none;
    font-weight: 600;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 1rem;
    background: var(--primary-light);
    border-radius: 50px;
    transition: var(--transition);
}

.tutor-contact:hover {
    background: var(--primary);
    color: white;
}

/* Loading and No Results */
.loading,
.no-results {
    text-align: center;
    padding: 4rem;
    color: var(--text-light);
    font-size: 1.1rem;
}

.hidden {
    display: none !important;
}

/* Admin Styles */
.admin-section {
    max-width: 800px;
    margin: 0 auto;
}

.login-card {
    background: var(--surface);
    padding: 3rem;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    max-width: 420px;
    margin: 4rem auto;
    border: 1px solid var(--border);
}

.login-card h1 {
    margin-bottom: 2rem;
    text-align: center;
    font-weight: 700;
}

.admin-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
}

.admin-card {
    background: var(--surface);
    padding: 2rem;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow);
    margin-bottom: 1.5rem;
    border: 1px solid var(--border);
}

.admin-card h2 {
    margin-bottom: 1.5rem;
    font-size: 1.25rem;
    font-weight: 700;
}

/* Forms */
.form-group {
    margin-bottom: 1.25rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 600;
    font-size: 0.95rem;
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 0.875rem 1rem;
    border: 2px solid var(--border);
    border-radius: var(--radius);
    font-size: 1rem;
    font-family: inherit;
    transition: var(--transition);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px var(--primary-light);
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
}

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

.error-message {
    color: var(--error);
    margin-top: 1rem;
    text-align: center;
    font-weight: 500;
}

/* Admin Tutors List */
.admin-tutors-list {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.admin-tutor-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.25rem;
    background: var(--background);
    border-radius: var(--radius);
}

.admin-tutor-info h4 {
    margin: 0 0 0.25rem 0;
    font-weight: 600;
}

.admin-tutor-info p {
    margin: 0;
    color: var(--text-light);
    font-size: 0.9rem;
}

.admin-tutor-actions {
    display: flex;
    gap: 0.5rem;
}

/* Footer */
footer {
    background: var(--surface);
    padding: 2rem;
    text-align: center;
    color: var(--text-light);
    border-top: 1px solid var(--border);
    font-size: 0.95rem;
}

/* Responsive */
@media (max-width: 768px) {
    .navbar {
        flex-direction: column;
        gap: 1rem;
        padding: 1rem;
    }

    .nav-links {
        gap: 1.5rem;
    }

    main {
        padding: 2rem 1rem;
    }

    .hero {
        flex-direction: column;
        padding: 3rem 1.5rem;
        text-align: center;
    }

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

    .hero-image {
        width: 150px;
    }

    .hero h1 {
        font-size: 2rem;
    }

    .hero p {
        font-size: 1.1rem;
    }

    .filters {
        flex-direction: column;
    }

    .search-input {
        min-width: 100%;
    }

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

    .admin-tutor-item {
        flex-direction: column;
        align-items: flex-start;
        gap: 1rem;
    }

    .tutors-grid {
        grid-template-columns: 1fr;
    }
}