/* ========================================
   CSS Variables & Design Tokens
======================================== */
:root {
    /* Colors */
    --primary-hue: 180;
    --primary: hsl(var(--primary-hue), 100%, 45%);
    --primary-light: hsl(var(--primary-hue), 100%, 55%);
    --primary-dark: hsl(var(--primary-hue), 100%, 35%);

    --secondary-hue: 280;
    --secondary: hsl(var(--secondary-hue), 100%, 65%);
    --secondary-light: hsl(var(--secondary-hue), 100%, 75%);

    --accent-hue: 340;
    --accent: hsl(var(--accent-hue), 100%, 60%);

    /* Backgrounds */
    --bg-dark: #0a0c10;
    --bg-card: rgba(15, 18, 25, 0.9);
    --bg-card-hover: rgba(20, 25, 35, 0.95);
    --bg-input: rgba(10, 12, 18, 0.9);

    /* Glass Effect */
    --glass-bg: rgba(255, 255, 255, 0.02);
    --glass-border: rgba(255, 255, 255, 0.06);
    --glass-border-hover: rgba(0, 200, 200, 0.3);
    --glass-shadow: 0 8px 32px rgba(0, 0, 0, 0.4);

    /* Text */
    --text-primary: #ffffff;
    --text-secondary: rgba(255, 255, 255, 0.7);
    --text-muted: rgba(255, 255, 255, 0.4);

    /* Gradients */
    --gradient-primary: linear-gradient(135deg, var(--primary), var(--secondary));
    --gradient-glow: linear-gradient(135deg,
            hsla(var(--primary-hue), 100%, 50%, 0.3),
            hsla(var(--secondary-hue), 100%, 65%, 0.3));

    /* Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;

    /* Border Radius */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    --radius-full: 9999px;

    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-normal: 250ms ease;
    --transition-slow: 400ms ease;

    /* Font */
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
}

/* ========================================
   Reset & Base Styles
======================================== */
*,
*::before,
*::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-family);
    background: var(--bg-dark);
    color: var(--text-primary);
    min-height: 100vh;
    line-height: 1.6;
    overflow-x: hidden;
}

/* ========================================
   Background Animation
======================================== */
.bg-animation {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: -1;
    overflow: hidden;
}

.gradient-orb {
    position: absolute;
    border-radius: 50%;
    filter: blur(120px);
    opacity: 0.4;
    animation: float 25s infinite ease-in-out;
}

.orb-1 {
    width: 700px;
    height: 700px;
    background: hsla(var(--primary-hue), 100%, 50%, 0.25);
    top: -300px;
    left: -200px;
    animation-delay: 0s;
}

.orb-2 {
    width: 600px;
    height: 600px;
    background: hsla(var(--secondary-hue), 100%, 50%, 0.2);
    bottom: -200px;
    right: -150px;
    animation-delay: -8s;
}

.orb-3 {
    width: 500px;
    height: 500px;
    background: hsla(var(--accent-hue), 100%, 50%, 0.15);
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    animation-delay: -16s;
}

@keyframes float {

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

    25% {
        transform: translate(60px, -60px) scale(1.1);
    }

    50% {
        transform: translate(-40px, 40px) scale(0.95);
    }

    75% {
        transform: translate(-60px, -40px) scale(1.05);
    }
}

/* ========================================
   Header
======================================== */
.header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-lg) var(--spacing-xl);
    max-width: 1200px;
    margin: 0 auto;
}

.logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.logo-icon {
    width: 44px;
    height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--gradient-primary);
    border-radius: var(--radius-md);
    color: white;
    box-shadow: 0 4px 20px rgba(0, 200, 200, 0.3);
}

.logo-icon svg {
    width: 26px;
    height: 26px;
}

.logo-text {
    font-size: 1.5rem;
    font-weight: 800;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    letter-spacing: -0.5px;
}

.header-badge {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-md);
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-full);
    font-size: 0.875rem;
    color: var(--text-secondary);
    backdrop-filter: blur(10px);
}

/* Developer Button */
.developer-btn {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-md);
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-full);
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--text-secondary);
    text-decoration: none;
    backdrop-filter: blur(10px);
    transition: var(--transition-normal);
}

.developer-btn svg {
    width: 18px;
    height: 18px;
    transition: var(--transition-normal);
}

.developer-btn:hover {
    background: var(--gradient-primary);
    border-color: transparent;
    color: white;
    box-shadow: 0 4px 20px rgba(0, 200, 200, 0.35);
    transform: translateY(-2px);
}

.developer-btn:hover svg {
    color: white;
}

.badge-dot {
    width: 8px;
    height: 8px;
    background: var(--primary);
    border-radius: 50%;
    animation: pulse 2s infinite;
    box-shadow: 0 0 10px var(--primary);
}

@keyframes pulse {

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

    50% {
        opacity: 0.6;
        transform: scale(1.3);
    }
}

/* ========================================
   Main Container
======================================== */
.main-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-xl) var(--spacing-2xl);
}

/* ========================================
   Hero Section
======================================== */
.hero {
    text-align: center;
    padding: var(--spacing-xl) 0 var(--spacing-lg);
}

/* ========================================
   Mode Selector
======================================== */
.mode-selector {
    display: flex;
    justify-content: center;
    margin-bottom: var(--spacing-xl);
}

.mode-switch-container {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-sm) var(--spacing-lg);
    background: var(--bg-card);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-full);
    backdrop-filter: blur(20px);
}

.mode-label {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--text-muted);
    transition: var(--transition-normal);
    cursor: pointer;
}

.mode-label svg {
    width: 18px;
    height: 18px;
}

.mode-label.active {
    color: var(--primary);
}

.mode-label[data-mode="image"].active svg {
    color: var(--primary);
}

.mode-label[data-mode="video"].active svg {
    color: var(--secondary);
}

/* Switch Toggle */
.mode-switch {
    position: relative;
    width: 56px;
    height: 28px;
    cursor: pointer;
}

.mode-switch input {
    opacity: 0;
    width: 0;
    height: 0;
}

.switch-slider {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    border-radius: var(--radius-full);
    transition: var(--transition-normal);
}

.switch-slider::before {
    content: '';
    position: absolute;
    width: 22px;
    height: 22px;
    left: 3px;
    top: 3px;
    background: white;
    border-radius: 50%;
    transition: var(--transition-normal);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.3);
}

.mode-switch input:checked+.switch-slider {
    background: linear-gradient(135deg, var(--secondary), var(--accent));
}

.mode-switch input:checked+.switch-slider::before {
    transform: translateX(28px);
}

/* Video Options Container */
.video-options-container {
    display: none;
    flex-direction: column;
    gap: var(--spacing-xl);
    padding-top: var(--spacing-xl);
    border-top: 1px solid var(--glass-border);
    margin-top: var(--spacing-lg);
    animation: fadeSlideIn 0.3s ease;
}

.video-options-container.visible {
    display: flex;
}

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

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

.hero-title {
    font-size: clamp(2rem, 5vw, 3.5rem);
    font-weight: 800;
    line-height: 1.2;
    margin-bottom: var(--spacing-lg);
    letter-spacing: -1px;
}

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

.hero-subtitle {
    font-size: 1.2rem;
    color: var(--text-secondary);
    max-width: 650px;
    margin: 0 auto;
}

/* ========================================
   Section Styles
======================================== */
.section-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: var(--spacing-md);
}

.section-title {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-primary);
}

.section-title svg {
    width: 20px;
    height: 20px;
    color: var(--primary);
}

/* Info Button */
.info-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 28px;
    height: 28px;
    background: transparent;
    border: 1px solid var(--glass-border);
    border-radius: 50%;
    color: var(--text-muted);
    cursor: pointer;
    transition: var(--transition-normal);
}

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

.info-btn svg {
    width: 16px;
    height: 16px;
}

/* ========================================
   Upload Section
======================================== */
.upload-section {
    background: var(--bg-card);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-xl);
    padding: var(--spacing-xl);
    margin-bottom: var(--spacing-xl);
    backdrop-filter: blur(20px);
}

.upload-area {
    position: relative;
    border: 2px dashed var(--glass-border);
    border-radius: var(--radius-lg);
    padding: var(--spacing-2xl);
    text-align: center;
    transition: var(--transition-normal);
    cursor: pointer;
    overflow: hidden;
}

.upload-area:hover {
    border-color: var(--primary);
    background: rgba(0, 200, 200, 0.03);
}

.upload-area.drag-over {
    border-color: var(--primary);
    background: rgba(0, 200, 200, 0.08);
}

.upload-area.has-image {
    padding: 0;
    border-style: solid;
    border-color: var(--primary);
}

.file-input {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    opacity: 0;
    cursor: pointer;
    z-index: 2;
}

.upload-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-md);
    pointer-events: none;
}

.upload-icon {
    width: 64px;
    height: 64px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(0, 200, 200, 0.1);
    border-radius: 50%;
    color: var(--primary);
}

.upload-icon svg {
    width: 32px;
    height: 32px;
}

.upload-text {
    font-size: 1rem;
    color: var(--text-primary);
    font-weight: 500;
}

.upload-hint {
    font-size: 0.85rem;
    color: var(--text-muted);
}

.image-preview {
    display: none;
    position: relative;
}

.upload-area.has-image .upload-content {
    display: none;
}

.upload-area.has-image .image-preview {
    display: block;
}

.upload-area.has-image .file-input {
    display: none;
}

#previewImg {
    width: 100%;
    max-height: 400px;
    object-fit: contain;
    border-radius: var(--radius-md);
}

.remove-image-btn {
    position: absolute;
    top: var(--spacing-md);
    right: var(--spacing-md);
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(239, 68, 68, 0.9);
    border: none;
    border-radius: 50%;
    color: white;
    cursor: pointer;
    transition: var(--transition-normal);
    z-index: 10;
}

.remove-image-btn:hover {
    background: #ef4444;
    transform: scale(1.1);
}

.remove-image-btn svg {
    width: 20px;
    height: 20px;
}

/* ========================================
   Builder Section
======================================== */
.builder-section {
    background: var(--bg-card);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-xl);
    padding: var(--spacing-xl);
    margin-bottom: var(--spacing-xl);
    backdrop-filter: blur(20px);
}

.prompt-form {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xl);
}

.form-group {
    display: flex;
    flex-direction: column;
}

.form-group.full-width {
    grid-column: 1 / -1;
}

/* ========================================
   Option Grid (Button Selection)
======================================== */
.option-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
    gap: var(--spacing-sm);
}

.option-btn {
    padding: var(--spacing-sm) var(--spacing-md);
    background: var(--bg-input);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-md);
    color: var(--text-secondary);
    font-family: inherit;
    font-size: 0.85rem;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition-normal);
    text-align: center;
}

.option-btn:hover {
    border-color: var(--glass-border-hover);
    color: var(--text-primary);
    background: rgba(0, 200, 200, 0.05);
}

.option-btn.selected {
    background: linear-gradient(135deg, rgba(0, 200, 200, 0.15), rgba(139, 92, 246, 0.15));
    border-color: var(--primary);
    color: var(--primary-light);
    box-shadow: 0 0 20px rgba(0, 200, 200, 0.15), inset 0 0 20px rgba(0, 200, 200, 0.05);
}

/* ========================================
   Form Inputs
======================================== */
.form-input,
.form-textarea {
    width: 100%;
    padding: var(--spacing-md);
    background: var(--bg-input);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-md);
    color: var(--text-primary);
    font-family: inherit;
    font-size: 0.95rem;
    transition: var(--transition-normal);
    outline: none;
}

.form-input::placeholder,
.form-textarea::placeholder {
    color: var(--text-muted);
}

.form-input:focus,
.form-textarea:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(0, 200, 200, 0.15);
}

.form-textarea {
    min-height: 100px;
    resize: vertical;
    line-height: 1.6;
}

/* ========================================
   Preview Section
======================================== */
.preview-section {
    margin-bottom: var(--spacing-xl);
}

.preview-card {
    background: var(--bg-card);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-xl);
    padding: var(--spacing-xl);
    backdrop-filter: blur(20px);
}

.card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-lg);
}

.card-title {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: 1.1rem;
    font-weight: 600;
}

.card-title svg {
    width: 22px;
    height: 22px;
    color: var(--primary);
}

.copy-btn {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-md);
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-md);
    color: var(--text-secondary);
    font-family: inherit;
    font-size: 0.85rem;
    cursor: pointer;
    transition: var(--transition-normal);
}

.copy-btn svg {
    width: 16px;
    height: 16px;
}

.copy-btn:hover {
    background: var(--gradient-primary);
    border-color: transparent;
    color: white;
}

.prompt-preview {
    padding: var(--spacing-lg);
    background: var(--bg-input);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-md);
    min-height: 150px;
    font-size: 0.9rem;
    line-height: 1.8;
    white-space: pre-wrap;
    word-wrap: break-word;
}

.preview-placeholder {
    color: var(--text-muted);
    font-style: italic;
}

.prompt-preview:not(:has(.preview-placeholder)) {
    color: var(--text-primary);
    background: linear-gradient(135deg,
            rgba(0, 200, 200, 0.03),
            rgba(139, 92, 246, 0.03));
    border-color: rgba(0, 200, 200, 0.2);
}

.prompt-preview .section-label {
    color: var(--primary);
    font-weight: 600;
    display: block;
    margin-bottom: var(--spacing-xs);
}

.prompt-preview .section-content {
    color: var(--text-secondary);
    margin-bottom: var(--spacing-md);
}

/* ========================================
   Action Button
======================================== */
.action-container {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-md);
}

.gemini-btn {
    position: relative;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-lg) var(--spacing-2xl);
    background: var(--gradient-primary);
    border: none;
    border-radius: var(--radius-full);
    color: white;
    font-family: inherit;
    font-size: 1.1rem;
    font-weight: 600;
    cursor: pointer;
    overflow: hidden;
    transition: var(--transition-normal);
    box-shadow: 0 8px 30px rgba(0, 200, 200, 0.35);
}

.gemini-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    box-shadow: none;
}

.gemini-btn:not(:disabled):hover {
    transform: translateY(-2px);
    box-shadow: 0 12px 40px rgba(0, 200, 200, 0.45);
}

.gemini-btn:not(:disabled):active {
    transform: translateY(0);
}

.btn-content {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    position: relative;
    z-index: 1;
}

.gemini-icon {
    width: 24px;
    height: 24px;
}

.btn-shine {
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg,
            transparent,
            rgba(255, 255, 255, 0.3),
            transparent);
    transition: left 0.5s ease;
}

.gemini-btn:not(:disabled):hover .btn-shine {
    left: 100%;
}

.action-hint {
    font-size: 0.9rem;
    color: var(--text-muted);
}

/* ========================================
   Footer
======================================== */

.footer {
    padding: 40px 0;
    border-top: 1px solid var(--border-color);
}

.footer-content {
    display: flex;
    justify-content: space-evenly;
    align-items: center;
}

.footer-content p {
    font-size: 0.9rem;
    color: var(--text-muted);
}

.footer-links {
    display: flex;
    gap: 24px;
}

.footer-links a {
    font-size: 0.9rem;
    color: var(--text-secondary);
    transition: var(--transition-fast);
}

.footer-links a:hover {
    color: var(--accent-primary);
}

/* ========================================
   Toast Notification
======================================== */
.toast {
    position: fixed;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%) translateY(100px);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md) var(--spacing-lg);
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    border-radius: var(--radius-full);
    color: white;
    font-weight: 500;
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-normal);
    z-index: 1000;
    box-shadow: 0 8px 30px rgba(0, 200, 200, 0.4);
}

.toast svg {
    width: 20px;
    height: 20px;
}

.toast.show {
    transform: translateX(-50%) translateY(0);
    opacity: 1;
    visibility: visible;
}

/* ========================================
   Tooltip
======================================== */
.tooltip {
    position: fixed;
    max-width: 300px;
    padding: var(--spacing-md);
    background: var(--bg-card);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-md);
    color: var(--text-secondary);
    font-size: 0.85rem;
    line-height: 1.5;
    z-index: 1001;
    pointer-events: none;
    opacity: 0;
    visibility: hidden;
    transition: opacity var(--transition-fast), visibility var(--transition-fast);
    backdrop-filter: blur(20px);
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.4);
}

.tooltip.visible {
    opacity: 1;
    visibility: visible;
}

/* ========================================
   Responsive Design
======================================== */

@media (max-width: 768px) {
    .header {
        padding: var(--spacing-md);
    }

    .header-badge {
        display: none;
    }

    .main-container {
        padding: 0 var(--spacing-md) var(--spacing-xl);
    }

    .hero {
        padding: var(--spacing-lg) 0;
    }

    .hero-title {
        font-size: 1.75rem;
    }

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



    .option-grid {
        grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
    }

    .upload-section,
    .builder-section,
    .preview-card {
        padding: var(--spacing-lg);
    }

    .card-header {
        flex-direction: column;
        gap: var(--spacing-sm);
        align-items: flex-start;
    }

    .gemini-btn {
        width: 100%;
        padding: var(--spacing-md) var(--spacing-lg);
    }

    .upload-area {
        padding: var(--spacing-xl);
    }

    .tooltip {
        max-width: 250px;
        left: 50% !important;
        transform: translateX(-50%);
    }
}

@media (max-width: 480px) {

    .option-grid {
        grid-template-columns: repeat(auto-fill, minmax(120px, 1fr));
    }

    .option-btn {
        padding: var(--spacing-sm);
        font-size: 0.8rem;
    }

    .section-title {
        font-size: 0.9rem;
    }
}