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

:root {
    --primary-color: #6366f1;
    --primary-dark: #4f46e5;
    --secondary-color: #8b5cf6;
    --text-color: #1f2937;
    --text-light: #6b7280;
    --bg-color: #ffffff;
    --bg-light: #f9fafb;
    --border-color: #e5e7eb;
    --success-color: #10b981;
    --error-color: #ef4444;
    --shadow: 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px 0 rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
}

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

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

/* Navigation */
.navbar {
    background-color: var(--bg-color);
    box-shadow: var(--shadow);
    position: sticky;
    top: 0;
    z-index: 100;
}

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 20px;
}

.nav-brand a {
    font-size: 1.5rem;
    font-weight: bold;
    color: var(--primary-color);
    text-decoration: none;
    transition: color 0.3s;
}

.nav-brand a:hover {
    color: var(--primary-dark);
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 2rem;
}

.nav-menu a {
    color: var(--text-color);
    text-decoration: none;
    font-weight: 500;
    transition: color 0.3s;
    position: relative;
}

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

.nav-menu a.active::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    right: 0;
    height: 2px;
    background-color: var(--primary-color);
}

.nav-user {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-left: 1rem;
    padding-left: 1rem;
    border-left: 1px solid var(--border-color);
}

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

.admin-badge {
    background-color: var(--primary-color);
    color: white;
    padding: 0.25rem 0.5rem;
    border-radius: 4px;
    font-size: 0.75rem;
    font-weight: 600;
}

.logout-btn {
    color: var(--text-light);
    font-size: 0.9rem;
    text-decoration: none;
    transition: color 0.3s;
}

.logout-btn:hover {
    color: var(--error-color);
}

/* Main Content */
.main-content {
    flex: 1;
}

/* Flash Messages */
.flash-messages {
    max-width: 1200px;
    margin: 20px auto;
    padding: 0 20px;
}

.flash-message {
    padding: 1rem;
    border-radius: 8px;
    margin-bottom: 1rem;
    animation: slideIn 0.3s ease-out;
}

.flash-success {
    background-color: #d1fae5;
    color: #065f46;
    border-left: 4px solid var(--success-color);
}

.flash-error {
    background-color: #fee2e2;
    color: #991b1b;
    border-left: 4px solid var(--error-color);
}

@keyframes slideIn {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Hero Section */
.hero {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    color: white;
    padding: 6rem 0;
    text-align: center;
}

.hero-title {
    font-size: 3.5rem;
    font-weight: bold;
    margin-bottom: 1rem;
    animation: fadeInUp 0.6s ease-out;
}

.hero-subtitle {
    font-size: 1.5rem;
    margin-bottom: 2rem;
    opacity: 0.9;
    animation: fadeInUp 0.8s ease-out;
}

.hero-buttons {
    display: flex;
    gap: 1rem;
    justify-content: center;
    animation: fadeInUp 1s ease-out;
}

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

/* Buttons */
.btn {
    display: inline-block;
    padding: 0.75rem 2rem;
    border-radius: 8px;
    text-decoration: none;
    font-weight: 600;
    transition: all 0.3s;
    border: none;
    cursor: pointer;
    font-size: 1rem;
}

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

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

.btn-secondary {
    background-color: transparent;
    color: white;
    border: 2px solid white;
}

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

/* Features Section */
.features {
    padding: 5rem 0;
    background-color: var(--bg-color);
}

.section-title {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 3rem;
    color: var(--text-color);
}

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

.feature-card {
    background-color: var(--bg-light);
    padding: 2rem;
    border-radius: 12px;
    text-align: center;
    transition: transform 0.3s, box-shadow 0.3s;
    border: 1px solid var(--border-color);
}

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

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

.feature-card h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
    color: var(--text-color);
}

.feature-card p {
    color: var(--text-light);
}

/* Page Header */
.page-header {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    color: white;
    padding: 4rem 0;
    text-align: center;
}

.page-header h1 {
    font-size: 3rem;
    margin-bottom: 0.5rem;
}

.page-subtitle {
    font-size: 1.25rem;
    opacity: 0.9;
}

/* Content Section */
.content-section {
    padding: 4rem 0;
}

.content-card {
    background-color: var(--bg-color);
    padding: 2rem;
    border-radius: 12px;
    margin-bottom: 2rem;
    box-shadow: var(--shadow);
}

.content-card h2 {
    color: var(--primary-color);
    margin-bottom: 1rem;
    font-size: 1.75rem;
}

.content-card p {
    color: var(--text-light);
    line-height: 1.8;
}

/* Contact Form */
.contact-wrapper {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: 2rem;
}

.contact-form-card,
.contact-info-card {
    background-color: var(--bg-color);
    padding: 2rem;
    border-radius: 12px;
    box-shadow: var(--shadow);
}

.contact-form-card h2,
.contact-info-card h2 {
    color: var(--primary-color);
    margin-bottom: 1.5rem;
    font-size: 1.75rem;
}

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

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

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 0.75rem;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    font-size: 1rem;
    font-family: inherit;
    transition: border-color 0.3s, box-shadow 0.3s;
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
}

.contact-info {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.info-item strong {
    display: block;
    color: var(--primary-color);
    margin-bottom: 0.5rem;
}

.info-item p {
    color: var(--text-light);
}

/* Error Pages */
.error-page {
    padding: 4rem 0;
    text-align: center;
}

.error-content {
    max-width: 700px;
    margin: 0 auto;
}

.error-image-container {
    margin-bottom: 2rem;
}

.error-image {
    max-width: 300px;
    width: 100%;
    height: auto;
    border-radius: 12px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s;
}

.error-image:hover {
    transform: scale(1.05);
}

.error-image-fallback {
    display: inline-block;
    padding: 2rem;
    background: linear-gradient(135deg, #f59e0b 0%, #d97706 100%);
    border-radius: 12px;
    color: white;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

.doubtful-bird-emoji {
    font-size: 4rem;
    margin-bottom: 0.5rem;
}

.doubtful-text {
    font-size: 1.5rem;
    font-weight: bold;
    letter-spacing: 2px;
}

.error-code {
    font-size: 6rem;
    font-weight: bold;
    color: var(--primary-color);
    line-height: 1;
    margin-bottom: 1rem;
}

.error-title {
    font-size: 2rem;
    margin-bottom: 1rem;
    color: var(--text-color);
}

.error-message {
    font-size: 1.125rem;
    color: var(--text-light);
    margin-bottom: 1rem;
}

.doubtful-message {
    font-size: 1.25rem;
    font-style: italic;
    color: var(--text-light);
    margin-bottom: 1rem;
}

/* Footer */
.footer {
    background-color: var(--text-color);
    color: white;
    text-align: center;
    padding: 2rem 0;
    margin-top: auto;
}

/* Responsive Design */
@media (max-width: 768px) {
    .nav-menu {
        gap: 1rem;
    }

    .hero-title {
        font-size: 2.5rem;
    }

    .hero-subtitle {
        font-size: 1.25rem;
    }

    .hero-buttons {
        flex-direction: column;
        align-items: center;
    }

    .btn {
        width: 100%;
        max-width: 300px;
    }

    .contact-wrapper {
        grid-template-columns: 1fr;
    }

    .error-code {
        font-size: 4rem;
    }
    
    .error-image {
        max-width: 250px;
    }
    
    .doubtful-text {
        font-size: 1.25rem;
    }
}

/* Video Cards */
.videos-section {
    padding: 4rem 0;
}

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

.video-card {
    background-color: var(--bg-color);
    border-radius: 12px;
    overflow: hidden;
    box-shadow: var(--shadow);
    transition: transform 0.3s, box-shadow 0.3s;
}

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

.video-link {
    text-decoration: none;
    color: inherit;
    display: block;
}

.video-thumbnail {
    width: 100%;
    height: 200px;
    background: #f3f4f6;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
    border: 1px solid #e5e7eb;
}

.thumbnail-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.play-icon {
    font-size: 3rem;
    color: white;
    opacity: 0.8;
}

.video-info {
    padding: 1.5rem;
}

.video-title {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
    color: var(--text-color);
}

.video-meta {
    font-size: 0.875rem;
    color: var(--text-light);
    margin-bottom: 0.75rem;
    display: flex;
    gap: 0.5rem;
    align-items: center;
}

.video-description {
    font-size: 0.9rem;
    color: var(--text-light);
    line-height: 1.5;
}

.delete-form {
    margin-top: 0.5rem;
    text-align: center;
}

.view-all {
    text-align: center;
    margin-top: 2rem;
}

.empty-state {
    text-align: center;
    padding: 4rem 2rem;
    color: var(--text-light);
}

.empty-state p {
    font-size: 1.125rem;
    margin-bottom: 1.5rem;
}

/* Video Player Page */
.video-page {
    padding: 2rem 0;
}

.video-wrapper {
    max-width: 1000px;
    margin: 0 auto;
}

.video-player-container {
    margin-bottom: 2rem;
    background-color: var(--bg-color);
    padding: 1rem;
    border-radius: 12px;
    box-shadow: var(--shadow);
}

.video-details {
    background-color: var(--bg-color);
    padding: 2rem;
    border-radius: 12px;
    box-shadow: var(--shadow);
}

.video-detail-title {
    font-size: 2rem;
    margin-bottom: 1rem;
    color: var(--text-color);
}

.video-meta-info {
    display: flex;
    flex-wrap: wrap;
    gap: 1.5rem;
    margin-bottom: 1.5rem;
    padding-bottom: 1.5rem;
    border-bottom: 1px solid var(--border-color);
}

.meta-item {
    font-size: 0.9rem;
    color: var(--text-light);
}

.meta-item strong {
    color: var(--text-color);
    margin-right: 0.5rem;
}

.video-description-full {
    margin-top: 1.5rem;
}

.video-description-full h3 {
    font-size: 1.25rem;
    margin-bottom: 0.75rem;
    color: var(--text-color);
}

.video-description-full p {
    color: var(--text-light);
    line-height: 1.8;
}

/* Auth Forms */
.auth-card {
    max-width: 500px;
    margin: 0 auto;
    background-color: var(--bg-color);
    padding: 2.5rem;
    border-radius: 12px;
    box-shadow: var(--shadow-lg);
}

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

.btn-block {
    width: 100%;
}

.auth-footer {
    text-align: center;
    padding-top: 1.5rem;
    border-top: 1px solid var(--border-color);
}

.auth-footer a {
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 500;
}

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

/* Upload Form */
.upload-card {
    max-width: 700px;
    margin: 0 auto;
    background-color: var(--bg-color);
    padding: 2.5rem;
    border-radius: 12px;
    box-shadow: var(--shadow-lg);
}

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

.file-input {
    width: 100%;
    padding: 0.75rem;
    border: 2px dashed var(--border-color);
    border-radius: 8px;
    background-color: var(--bg-light);
    cursor: pointer;
    transition: border-color 0.3s;
}

.file-input:hover {
    border-color: var(--primary-color);
}

.form-help {
    display: block;
    margin-top: 0.5rem;
    font-size: 0.875rem;
    color: var(--text-light);
}

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

/* Responsive Updates */
@media (max-width: 768px) {
    .nav-user {
        flex-direction: column;
        align-items: flex-start;
        gap: 0.5rem;
        border-left: none;
        border-top: 1px solid var(--border-color);
        padding-top: 1rem;
        margin-top: 1rem;
        margin-left: 0;
        padding-left: 0;
    }

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

    .video-meta-info {
        flex-direction: column;
        gap: 0.75rem;
    }

    .form-actions {
        flex-direction: column;
    }

    .form-actions .btn {
        width: 100%;
    }
}

/* Approval Warning */
.approval-warning {
    background-color: #fef3c7;
    border-left: 4px solid #f59e0b;
    padding: 2rem;
    border-radius: 8px;
    margin: 2rem 0;
    text-align: center;
}

.approval-warning h2 {
    color: #92400e;
    margin-bottom: 0.5rem;
    font-size: 1.5rem;
}

.approval-warning p {
    color: #78350f;
    font-size: 1.125rem;
    margin: 0;
}

/* Flash Warning */
.flash-warning {
    background-color: #fef3c7;
    color: #92400e;
    border-left: 4px solid #f59e0b;
}