:root {
    --primary-blue: #1e3a5f;
    --primary-blue-light: #2d5a8c;
    --primary-blue-lighter: #e8f0f7;
    --secondary-blue: #4a90e2;
    --accent-blue: #6db3f2;
    --white: #ffffff;
    --gray-light: #f8fafb;
    --gray-medium: #e8ecf1;
    --gray-dark: #6b7280;
    --text-dark: #1a1f2e;
    --text-light: #4a5568;
    --border-radius: 16px;
    --border-radius-small: 8px;
    --shadow-sm: 0 2px 8px rgba(30, 58, 95, 0.08);
    --shadow-md: 0 8px 24px rgba(30, 58, 95, 0.12);
    --shadow-lg: 0 16px 40px rgba(30, 58, 95, 0.15);
}

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

html, body {
    height: 100%;
    width: 100%;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Helvetica Neue', sans-serif;
    background: linear-gradient(135deg, #f8fafb 0%, #e8f0f7 50%, #f8fafb 100%);
    color: var(--text-dark);
    line-height: 1.6;
    min-height: 100vh;
    padding: 0;
    overflow-x: hidden;
    padding-top: 70px;
}

/* UNIFIED HEADER STYLES - Identical across all pages */
.site-header {
    position: fixed !important;
    top: 0 !important;
    left: 0 !important;
    right: 0 !important;
    width: 100% !important;
    background: #1e3a5f !important;
    color: #ffffff !important;
    z-index: 1000 !important;
    box-shadow: 0 2px 12px rgba(30, 58, 95, 0.15) !important;
    border-bottom: 2px solid rgba(255, 255, 255, 0.1) !important;
    margin: 0 !important;
    padding: 0 !important;
}

.site-header .header-container,
.header-container {
    max-width: 1400px !important;
    margin: 0 auto !important;
    padding: 0 40px !important;
    display: flex !important;
    justify-content: space-between !important;
    align-items: center !important;
    height: 70px !important;
    position: relative !important;
    box-sizing: border-box !important;
}

.site-header .header-logo,
.header-logo {
    font-size: 28px !important;
    font-weight: 800 !important;
    margin: 0 !important;
    padding: 0 !important;
    position: relative !important;
    z-index: 1 !important;
    letter-spacing: -0.5px !important;
    color: #ffffff !important;
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Helvetica Neue', sans-serif !important;
    line-height: 1 !important;
}

.site-header .header-logo-link,
.header-logo-link {
    color: #ffffff !important;
    text-decoration: none !important;
    transition: all 0.3s ease !important;
    display: inline-block !important;
    font-weight: 800 !important;
}

.site-header .header-logo-link:hover,
.header-logo-link:hover {
    opacity: 0.9 !important;
    transform: translateY(-1px) !important;
}

.site-header .header-nav,
.header-nav {
    display: flex !important;
    gap: 12px !important;
    flex-wrap: wrap !important;
    align-items: center !important;
    position: relative !important;
    z-index: 1 !important;
    margin: 0 !important;
    padding: 0 !important;
}

.site-header .nav-link,
.site-header .nav-button,
.nav-link,
.nav-button {
    color: #ffffff !important;
    text-decoration: none !important;
    font-size: 14px !important;
    font-weight: 600 !important;
    padding: 10px 18px !important;
    background: rgba(255, 255, 255, 0.12) !important;
    border: 1px solid rgba(255, 255, 255, 0.2) !important;
    border-radius: 8px !important;
    cursor: pointer !important;
    font-family: inherit !important;
    display: inline-flex !important;
    align-items: center !important;
    transition: all 0.3s ease !important;
    white-space: nowrap !important;
    margin: 0 !important;
}

.site-header .nav-link:hover,
.site-header .nav-button:hover,
.nav-link:hover,
.nav-button:hover {
    background: rgba(255, 255, 255, 0.25) !important;
    border-color: rgba(255, 255, 255, 0.35) !important;
    transform: translateY(-2px) !important;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15) !important;
}

.site-header .nav-link-primary,
.nav-link-primary {
    background: rgba(255, 255, 255, 0.25) !important;
    border-color: rgba(255, 255, 255, 0.35) !important;
    font-weight: 700 !important;
}

.site-header .nav-link-primary:hover,
.nav-link-primary:hover {
    background: rgba(255, 255, 255, 0.35) !important;
    border-color: rgba(255, 255, 255, 0.45) !important;
}

.site-header .nav-form,
.nav-form {
    display: inline !important;
    margin: 0 !important;
    padding: 0 !important;
}

.site-header .nav-welcome,
.nav-welcome {
    background: none !important;
    border: none !important;
    color: rgba(255, 255, 255, 0.95) !important;
    padding: 8px 12px !important;
    font-size: 14px !important;
    font-weight: 500 !important;
    margin: 0 !important;
}

.site-header .nav-welcome strong,
.nav-welcome strong {
    color: #ffffff !important;
    font-weight: 700 !important;
}

.container {
    max-width: 900px;
    margin: 0 auto;
    background: var(--white);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-lg);
    padding: 50px;
    margin-top: 30px;
    margin-bottom: 30px;
    overflow: hidden;
}

h1 {
    color: var(--primary-blue);
    font-size: 36px;
    font-weight: 700;
    margin-bottom: 25px;
    letter-spacing: -0.5px;
    line-height: 1.3;
}

h2 {
    color: var(--primary-blue);
    font-size: 24px;
    font-weight: 600;
    margin-top: 30px;
    margin-bottom: 15px;
    line-height: 1.4;
}

h3 {
    color: var(--primary-blue);
    font-size: 20px;
    font-weight: 600;
    margin-top: 25px;
    margin-bottom: 12px;
    line-height: 1.4;
}

p {
    margin-bottom: 15px;
    color: var(--text-dark);
    line-height: 1.7;
}

a {
    color: var(--secondary-blue);
    text-decoration: none;
    transition: color 0.2s;
    font-weight: 500;
}

a:hover {
    color: var(--primary-blue);
}

form {
    margin-top: 25px;
}

.form-group {
    margin-bottom: 25px;
}

label {
    display: block;
    margin-bottom: 10px;
    color: var(--primary-blue);
    font-weight: 600;
    font-size: 14px;
    text-transform: uppercase;
    letter-spacing: 0.3px;
    line-height: 1.5;
}

input[type="text"],
input[type="password"],
input[type="file"],
input[type="number"],
input[type="email"] {
    width: 100%;
    padding: 14px 16px;
    border: 2px solid var(--gray-medium);
    border-radius: var(--border-radius-small);
    font-size: 15px;
    font-family: inherit;
    transition: all 0.3s ease;
    background: var(--white);
    color: var(--text-dark);
}

input[type="text"]:focus,
input[type="password"]:focus,
input[type="file"]:focus,
input[type="number"]:focus,
input[type="email"]:focus {
    outline: none;
    border-color: var(--secondary-blue);
    box-shadow: 0 0 0 4px rgba(74, 144, 226, 0.1);
    background: rgba(74, 144, 226, 0.02);
}

input[type="file"] {
    padding: 12px;
    cursor: pointer;
}

button[type="submit"],
.btn-primary {
    background: linear-gradient(135deg, var(--primary-blue) 0%, var(--primary-blue-light) 100%);
    color: var(--white);
    padding: 14px 32px;
    border: none;
    border-radius: var(--border-radius-small);
    font-size: 15px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    font-family: inherit;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    box-shadow: var(--shadow-md);
}

button[type="submit"]:hover,
.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 12px 32px rgba(30, 58, 95, 0.25);
}

button[type="submit"]:active,
.btn-primary:active {
    transform: translateY(-1px);
}

.btn-primary {
    display: inline-block;
}

.btn-secondary {
    background: linear-gradient(135deg, var(--secondary-blue) 0%, var(--accent-blue) 100%);
    color: var(--white);
    padding: 14px 32px;
    border: none;
    border-radius: var(--border-radius-small);
    font-size: 15px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    font-family: inherit;
    display: inline-block;
    text-decoration: none;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    box-shadow: var(--shadow-md);
}

.btn-secondary:hover {
    transform: translateY(-3px);
    box-shadow: 0 12px 32px rgba(74, 144, 226, 0.3);
    text-decoration: none;
}

.btn-secondary:active {
    transform: translateY(-1px);
}

.button-group {
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
    margin-top: 25px;
}

.button-group-center {
    justify-content: center;
    text-align: center;
}

.help-text {
    font-size: 13px;
    color: var(--text-light);
    margin-top: 6px;
    font-style: italic;
    line-height: 1.6;
}

.error-message {
    background: #fef2f2;
    border: 2px solid #dc2626;
    border-radius: var(--border-radius-small);
    padding: 16px;
    margin-bottom: 20px;
    color: #991b1b;
    font-weight: 600;
    line-height: 1.6;
}

.error-message ul {
    margin-left: 20px;
    margin-top: 10px;
}

.alert {
    padding: 16px 20px;
    border-radius: var(--border-radius-small);
    margin-bottom: 20px;
    border-left: 4px solid var(--secondary-blue);
    line-height: 1.6;
}

.alert-info {
    background: linear-gradient(135deg, rgba(30, 58, 95, 0.08) 0%, rgba(74, 144, 226, 0.08) 100%);
    color: var(--primary-blue);
    font-weight: 500;
    border-left-color: var(--secondary-blue);
}

.alert-error {
    background: linear-gradient(135deg, rgba(239, 68, 68, 0.1) 0%, rgba(220, 38, 38, 0.1) 100%);
    border-left-color: #ef4444;
    color: #991b1b;
    font-weight: 500;
}

.video-ready-section {
    background: linear-gradient(135deg, rgba(16, 185, 129, 0.1) 0%, rgba(5, 150, 105, 0.1) 100%);
    border: 2px solid #10b981;
    border-radius: var(--border-radius-small);
    padding: 1.5em;
    margin: 1.5em 0;
}

.video-ready-section h2 {
    margin-top: 0;
    color: #059669;
}

.video-processing {
    color: #f57c00;
    font-weight: 500;
}

.progress-container {
    margin: 1em 0;
}

.progress-container .progress-bar-container {
    background-color: var(--gray-light);
    border-radius: 8px;
    padding: 3px;
    margin-bottom: 0.5em;
    border: 1px solid var(--gray-medium);
}

.progress-container .progress-bar {
    background: linear-gradient(90deg, #10b981 0%, #059669 100%);
    height: 24px;
    border-radius: 6px;
    transition: width 0.3s ease;
    box-shadow: 0 2px 4px rgba(16, 185, 129, 0.2);
}

.log-content {
    background-color: var(--gray-light);
    padding: 1em;
    border-radius: var(--border-radius-small);
    overflow-x: auto;
    max-height: 400px;
    overflow-y: auto;
    border: 1px solid var(--gray-medium);
    font-size: 13px;
    line-height: 1.6;
}

pre {
    background: var(--gray-light);
    padding: 20px;
    border-radius: var(--border-radius-small);
    overflow-x: auto;
    border: 1px solid var(--gray-medium);
    font-family: 'Courier New', monospace;
    font-size: 13px;
    line-height: 1.5;
}

video {
    width: 100%;
    max-width: 900px;
    border-radius: var(--border-radius-small);
    box-shadow: var(--shadow-lg);
    margin: 25px 0;
    border: 1px solid var(--gray-medium);
}

/* DNA Loading Animation */
.loading-container {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, var(--primary-blue) 0%, var(--primary-blue-light) 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9999;
    overflow: hidden;
}

.loading-container::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: radial-gradient(circle at 20% 50%, rgba(109, 179, 242, 0.2) 0%, transparent 50%),
                radial-gradient(circle at 80% 80%, rgba(74, 144, 226, 0.15) 0%, transparent 50%);
    pointer-events: none;
}

.dna-strand {
    position: relative;
    width: 120px;
    height: 300px;
    z-index: 1;
}

.dna-dot {
    position: absolute;
    width: 16px;
    height: 16px;
    border-radius: 50%;
    background: var(--white);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
}

.dna-dot:nth-child(1) {
    left: 20%;
    top: 0%;
    animation: dnaRotate 3s infinite ease-in-out;
    animation-delay: 0s;
}

.dna-dot:nth-child(2) {
    right: 20%;
    top: 10%;
    animation: dnaRotate 3s infinite ease-in-out;
    animation-delay: 0.15s;
}

.dna-dot:nth-child(3) {
    left: 15%;
    top: 20%;
    animation: dnaRotate 3s infinite ease-in-out;
    animation-delay: 0.3s;
}

.dna-dot:nth-child(4) {
    right: 15%;
    top: 30%;
    animation: dnaRotate 3s infinite ease-in-out;
    animation-delay: 0.45s;
}

.dna-dot:nth-child(5) {
    left: 10%;
    top: 40%;
    animation: dnaRotate 3s infinite ease-in-out;
    animation-delay: 0.6s;
}

.dna-dot:nth-child(6) {
    right: 10%;
    top: 50%;
    animation: dnaRotate 3s infinite ease-in-out;
    animation-delay: 0.75s;
}

.dna-dot:nth-child(7) {
    left: 15%;
    top: 60%;
    animation: dnaRotate 3s infinite ease-in-out;
    animation-delay: 0.9s;
}

.dna-dot:nth-child(8) {
    right: 15%;
    top: 70%;
    animation: dnaRotate 3s infinite ease-in-out;
    animation-delay: 1.05s;
}

.dna-dot:nth-child(9) {
    left: 20%;
    top: 80%;
    animation: dnaRotate 3s infinite ease-in-out;
    animation-delay: 1.2s;
}

.dna-dot:nth-child(10) {
    right: 20%;
    top: 90%;
    animation: dnaRotate 3s infinite ease-in-out;
    animation-delay: 1.35s;
}

@keyframes dnaRotate {
    0% {
        opacity: 0.3;
        transform: scale(0.8) rotateZ(0deg);
    }
    50% {
        opacity: 1;
        transform: scale(1) rotateZ(180deg);
    }
    100% {
        opacity: 0.3;
        transform: scale(0.8) rotateZ(360deg);
    }
}

.loading-text {
    position: absolute;
    bottom: 50px;
    color: var(--white);
    font-size: 16px;
    font-weight: 600;
    letter-spacing: 1px;
    text-transform: uppercase;
    z-index: 2;
    animation: pulse 2s infinite ease-in-out;
}

@keyframes pulse {
    0%, 100% {
        opacity: 0.6;
    }
    50% {
        opacity: 1;
    }
}

.welcome-message {
    background: linear-gradient(135deg, var(--primary-blue-lighter) 0%, rgba(109, 179, 242, 0.08) 100%);
    padding: 20px 24px;
    border-radius: var(--border-radius-small);
    margin-bottom: 25px;
    border-left: 4px solid var(--secondary-blue);
    font-weight: 500;
    color: var(--primary-blue);
}

.link-list {
    list-style: none;
    padding: 0;
}

.link-list li {
    margin-bottom: 12px;
}

.link-list a {
    display: inline-block;
    padding: 12px 20px;
    background: linear-gradient(135deg, var(--primary-blue-lighter) 0%, rgba(109, 179, 242, 0.08) 100%);
    border-radius: var(--border-radius-small);
    color: var(--secondary-blue);
    transition: all 0.3s ease;
    border: 1px solid rgba(74, 144, 226, 0.2);
}

.link-list a:hover {
    background: linear-gradient(135deg, var(--secondary-blue) 0%, var(--primary-blue-light) 100%);
    color: var(--white);
    text-decoration: none;
    transform: translateX(4px);
    box-shadow: var(--shadow-md);
}

/* Video Cards */
.video-card {
    border: 2px solid var(--gray-medium);
    border-radius: var(--border-radius-small);
    padding: 1.5em;
    margin-bottom: 1.5em;
    background-color: var(--white);
    box-shadow: var(--shadow-sm);
    transition: all 0.3s ease;
}

.video-card:hover {
    box-shadow: var(--shadow-md);
    border-color: var(--secondary-blue);
    transform: translateY(-2px);
}

.video-card-header {
    display: flex;
    justify-content: space-between;
    align-items: start;
    margin-bottom: 1em;
    gap: 1em;
}

.video-card-info h3 {
    margin: 0 0 0.5em 0;
    font-size: 1.2em;
}

.video-card-info h3 a {
    color: var(--primary-blue);
    text-decoration: none;
    transition: color 0.2s;
}

.video-card-info h3 a:hover {
    color: var(--secondary-blue);
    text-decoration: underline;
}

.video-meta {
    margin: 0;
    color: var(--text-light);
    font-size: 0.9em;
    line-height: 1.6;
}

.video-status {
    text-align: right;
    flex-shrink: 0;
}

.status-badge {
    display: inline-block;
    padding: 0.4em 0.8em;
    border-radius: 6px;
    font-size: 0.9em;
    font-weight: 700;
    color: var(--white);
    white-space: nowrap;
}

.status-completed {
    background-color: #10b981;
}

.status-running {
    background-color: #2196F3;
}

.status-pending {
    background-color: #FF9800;
}

.status-failed {
    background-color: #ef4444;
}

.video-progress {
    margin: 1em 0;
}

.progress-bar-container {
    background-color: var(--gray-light);
    border-radius: 8px;
    padding: 3px;
    margin-bottom: 0.5em;
    border: 1px solid var(--gray-medium);
}

.progress-bar {
    background: linear-gradient(90deg, #10b981 0%, #059669 100%);
    height: 20px;
    border-radius: 6px;
    transition: width 0.3s ease;
    box-shadow: 0 2px 4px rgba(16, 185, 129, 0.2);
}

.progress-text {
    margin: 0;
    font-size: 0.9em;
    color: var(--text-light);
    font-weight: 500;
}

.video-preview {
    margin: 1em 0;
}

.video-preview video {
    width: 100%;
    max-width: 600px;
    border-radius: var(--border-radius-small);
    background-color: #000;
    box-shadow: var(--shadow-md);
}

.empty-state {
    text-align: center;
    padding: 3em;
    color: var(--text-light);
}

.empty-state p {
    font-size: 1.2em;
    margin-bottom: 1em;
    color: var(--text-light);
}

@media (max-width: 768px) {
    body {
        padding-top: 70px;
    }

    .header-container {
        padding: 0 20px;
        height: 70px;
    }

    .header-logo {
        font-size: 22px;
    }

    .header-nav {
        gap: 8px;
    }

    .nav-link, .nav-button {
        font-size: 12px;
        padding: 8px 12px;
    }

    .nav-welcome {
        display: none;
    }

    .container {
        padding: 30px;
        margin: 15px 10px;
    }

    h1 {
        font-size: 28px;
    }

    h2 {
        font-size: 20px;
    }

    button[type="submit"],
    .btn-primary,
    .btn-secondary {
        padding: 12px 24px;
        font-size: 14px;
    }
}

@media (max-width: 480px) {
    body {
        padding: 0;
        padding-top: 70px;
    }

    .header-container {
        padding: 0 16px;
        height: 70px;
    }

    .header-logo {
        font-size: 20px;
    }

    .header-nav {
        gap: 6px;
    }

    .nav-link, .nav-button {
        font-size: 11px;
        padding: 8px 10px;
    }

    .nav-welcome {
        display: none;
    }

    .container {
        padding: 20px;
        margin: 10px 0;
        border-radius: 12px;
    }

    h1 {
        font-size: 24px;
    }

    .button-group {
        flex-direction: column;
    }

    button[type="submit"],
    .btn-primary,
    .btn-secondary {
        width: 100%;
        padding: 14px;
    }
}