/* FreeAI Global Design System */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&family=Outfit:wght@400;600;700;800&display=swap');

:root {
    /* Theme variables - Default Dark Mode */
    --bg-color: #05070f;
    --bg-gradient: radial-gradient(circle at 50% -20%, #151833, #05070f 75%);
    --card-bg: rgba(13, 17, 34, 0.55);
    --card-border: rgba(255, 255, 255, 0.06);
    --text-color: #f3f4f6;
    --text-muted: #9ca3af;
    --primary-color: #6366f1;
    --primary-hover: #4f46e5;
    --accent-color: #00d2d3;
    --accent-glow: rgba(0, 210, 211, 0.4);
    --success-color: #10b981;
    --error-color: #ef4444;
    --input-bg: rgba(7, 9, 21, 0.85);
    --input-border: rgba(255, 255, 255, 0.1);
    --input-focus: #00d2d3;
    --shadow: 0 15px 35px rgba(0, 0, 0, 0.5);
    --glow-opacity: 0.15;
    
    /* Global scrollbar styling */
    --scrollbar-track: #0a0c16;
    --scrollbar-thumb: #252a44;
}

body.light-theme {
    /* Theme variables - Light Mode */
    --bg-color: #f3f4f6;
    --bg-gradient: radial-gradient(circle at 50% -20%, #e0e7ff, #f3f4f6 80%);
    --card-bg: rgba(255, 255, 255, 0.75);
    --card-border: rgba(0, 0, 0, 0.08);
    --text-color: #1f2937;
    --text-muted: #6b7280;
    --primary-color: #4f46e5;
    --primary-hover: #3730a3;
    --accent-color: #0284c7;
    --accent-glow: rgba(2, 132, 199, 0.25);
    --success-color: #059669;
    --error-color: #dc2626;
    --input-bg: rgba(255, 255, 255, 0.95);
    --input-border: rgba(0, 0, 0, 0.12);
    --input-focus: #0284c7;
    --shadow: 0 15px 35px rgba(99, 102, 241, 0.1);
    --glow-opacity: 0.02;
    
    --scrollbar-track: #e5e7eb;
    --scrollbar-thumb: #cbd5e1;
}

/* Base Styles */
* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
    font-family: 'Inter', sans-serif;
    transition: background-color 0.3s ease, border-color 0.3s ease, color 0.3s ease;
}

html, body {
    min-height: 100vh;
    background-color: var(--bg-color);
    background-image: var(--bg-gradient);
    color: var(--text-color);
    font-size: 16px;
    line-height: 1.6;
    overflow-x: hidden;
}

/* Custom Scrollbars */
::-webkit-scrollbar {
    width: 10px;
    height: 10px;
}

::-webkit-scrollbar-track {
    background: var(--scrollbar-track);
}

::-webkit-scrollbar-thumb {
    background: var(--scrollbar-thumb);
    border-radius: 5px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--primary-color);
}

/* Layout Elements */
.app-container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 20px;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* Header & Nav */
header {
    padding: 20px 0;
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid var(--card-border);
}

.logo-section {
    display: flex;
    align-items: center;
    gap: 12px;
    text-decoration: none;
    color: var(--text-color);
}

.logo-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
}

.logo-svg {
    width: 100%;
    height: 100%;
    display: block;
}

.logo-text {
    font-family: 'Outfit', sans-serif;
    font-weight: 700;
    font-size: 1.4rem;
    letter-spacing: 0.5px;
}

.nav-controls {
    display: flex;
    align-items: center;
    gap: 20px;
}

/* Language Dropdown Switcher */
.lang-dropdown {
    position: relative;
    display: inline-block;
}

.lang-dropdown-btn {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text-muted);
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    padding: 8px 16px;
    border-radius: 10px;
    cursor: pointer;
    transition: border-color 0.2s, color 0.2s, background 0.2s;
}

.lang-dropdown-btn:hover {
    color: var(--text-color);
    border-color: var(--primary-color);
    background: rgba(255, 255, 255, 0.05);
}

.lang-dropdown-content {
    display: none;
    position: absolute;
    right: 0;
    top: calc(100% + 8px);
    background: var(--input-bg);
    border: 1px solid var(--card-border);
    border-radius: 12px;
    min-width: 140px;
    box-shadow: var(--shadow);
    z-index: 50;
    overflow: hidden;
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    padding: 6px 0;
}

.lang-dropdown-content a {
    color: var(--text-muted);
    padding: 10px 16px;
    text-decoration: none;
    display: block;
    font-size: 0.9rem;
    font-weight: 500;
    transition: background 0.2s, color 0.2s;
    text-align: left;
}

.lang-dropdown-content a:hover {
    background: rgba(255, 255, 255, 0.08);
    color: var(--text-color);
}

.lang-dropdown:hover .lang-dropdown-content,
.lang-dropdown:focus-within .lang-dropdown-content {
    display: block;
}

/* Theme Toggle Button */
.theme-toggle-btn {
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    color: var(--text-color);
    padding: 8px;
    border-radius: 8px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.1rem;
    width: 38px;
    height: 38px;
}

.theme-toggle-btn:hover {
    border-color: var(--accent-color);
}

/* Main Content Wrapper */
main {
    flex: 1;
    padding: 40px 0;
}

/* Hero Section (Home) */
.hero {
    text-align: center;
    max-width: 800px;
    margin: 80px auto 40px;
    position: relative;
}

.hero-glow {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 350px;
    height: 350px;
    background: radial-gradient(circle, var(--accent-color) 0%, transparent 70%);
    opacity: var(--glow-opacity);
    filter: blur(40px);
    pointer-events: none;
    z-index: -1;
}

.hero h1 {
    font-family: 'Outfit', sans-serif;
    font-size: clamp(2.5rem, 6vw, 4rem);
    font-weight: 800;
    line-height: 1.1;
    margin-bottom: 20px;
    background: linear-gradient(135deg, var(--text-color) 40%, var(--accent-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero p {
    font-size: clamp(1rem, 2.5vw, 1.25rem);
    color: var(--text-muted);
    max-width: 600px;
    margin: 0 auto 35px;
    text-wrap: pretty;
}

/* Premium Tech/Cyber Button */
.cta-btn {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    background: linear-gradient(135deg, var(--primary-color), var(--primary-hover));
    color: #ffffff;
    font-weight: 600;
    font-size: 1.1rem;
    padding: 16px 36px;
    border-radius: 12px;
    text-decoration: none;
    box-shadow: 0 4px 20px rgba(99, 102, 241, 0.4);
    border: 1px solid rgba(255, 255, 255, 0.1);
    cursor: pointer;
    position: relative;
    overflow: hidden;
}

.cta-btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    transition: 0.5s;
}

.cta-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 25px rgba(99, 102, 241, 0.6);
}

.cta-btn:hover::before {
    left: 100%;
}

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

/* Features Grid (Homepage optionals) */
.features-container {
    max-width: 900px;
    margin: 60px auto 0;
    padding: 30px;
    border-radius: 20px;
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    backdrop-filter: blur(16px);
    box-shadow: var(--shadow);
}

.features-container h2 {
    font-family: 'Outfit', sans-serif;
    font-size: 1.6rem;
    font-weight: 700;
    text-align: center;
    margin-bottom: 15px;
}

.features-container p {
    text-align: center;
    color: var(--text-muted);
}

/* Tool Grid (Two Column Layout for Generator) */
.tool-grid {
    display: grid;
    grid-template-columns: 1.1fr 0.9fr;
    gap: 30px;
    align-items: start;
    margin-top: 20px;
}

@media (max-width: 1024px) {
    .tool-grid {
        grid-template-columns: 1fr;
    }
}

.card {
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: 20px;
    padding: 30px;
    backdrop-filter: blur(16px);
    box-shadow: var(--shadow);
    position: relative;
    overflow: hidden;
}

/* Glowing border decoration */
.card::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: linear-gradient(90deg, var(--primary-color), var(--accent-color));
}

.card h2, .card h3 {
    font-family: 'Outfit', sans-serif;
    font-weight: 700;
    margin-bottom: 25px;
    font-size: 1.5rem;
}

/* Form Styling */
.form-group {
    margin-bottom: 22px;
}

.form-group label {
    display: block;
    font-weight: 600;
    font-size: 0.95rem;
    margin-bottom: 8px;
    color: var(--text-color);
}

.form-row {
    display: flex;
    gap: 15px;
}

.form-row > div {
    flex: 1;
}

/* Inputs & Form Controls */
textarea, input[type="text"], input[type="number"], select {
    width: 100%;
    background: var(--input-bg);
    border: 1px solid var(--input-border);
    color: var(--text-color);
    padding: 12px 16px;
    border-radius: 10px;
    font-size: 1rem;
    outline: none;
}

textarea:focus, input[type="text"]:focus, input[type="number"]:focus, select:focus {
    border-color: var(--input-focus);
    box-shadow: 0 0 0 2px rgba(0, 210, 211, 0.15);
}

textarea {
    min-height: 110px;
    resize: vertical;
}

.parameter-tips {
    font-size: 0.82rem;
    color: var(--text-muted);
    margin-top: 6px;
}

.model-info {
    font-size: 0.85rem;
    color: var(--accent-color);
    margin-top: 6px;
    font-weight: 500;
}

/* Seed Input Wrapper */
.seed-wrapper {
    display: flex;
    gap: 10px;
}

/* Checkboxes */
.checkbox-container {
    display: flex;
    flex-direction: column;
    gap: 12px;
    margin-bottom: 25px;
}

.checkbox-group {
    display: flex;
    align-items: center;
    gap: 10px;
    cursor: pointer;
    user-select: none;
}

.checkbox-group input[type="checkbox"] {
    appearance: none;
    width: 20px;
    height: 20px;
    background-color: var(--input-bg);
    border: 1px solid var(--input-border);
    border-radius: 6px;
    cursor: pointer;
    display: grid;
    place-content: center;
}

.checkbox-group input[type="checkbox"]::before {
    content: "";
    width: 10px;
    height: 10px;
    transform: scale(0);
    transition: 120ms transform ease-in-out;
    box-shadow: inset 1em 1em var(--accent-color);
    border-radius: 2px;
}

.checkbox-group input[type="checkbox"]:checked::before {
    transform: scale(1);
}

.checkbox-group input[type="checkbox"]:checked {
    border-color: var(--accent-color);
}

.checkbox-group label {
    margin-bottom: 0;
    cursor: pointer;
}

/* Form Action Buttons */
.button-row {
    display: flex;
    gap: 15px;
    margin-top: 25px;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 14px 24px;
    border-radius: 10px;
    font-weight: 600;
    font-size: 1rem;
    cursor: pointer;
    border: 1px solid transparent;
    text-shadow: none;
}

.btn-primary {
    flex: 2;
    background: linear-gradient(135deg, var(--primary-color), var(--primary-hover));
    color: #ffffff;
    box-shadow: 0 4px 15px rgba(99, 102, 241, 0.3);
}

.btn-primary:hover {
    transform: translateY(-1px);
    box-shadow: 0 6px 20px rgba(99, 102, 241, 0.4);
}

.btn-secondary {
    flex: 1;
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    color: var(--text-color);
}

.btn-secondary:hover {
    border-color: var(--text-muted);
    background: rgba(255, 255, 255, 0.05);
}

/* Image Preview Block */
.preview-container {
    display: flex;
    flex-direction: column;
    height: 100%;
}

.image-canvas {
    flex: 1;
    background: #0b0c16;
    border-radius: 14px;
    min-height: 360px;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    border: 1px dashed var(--card-border);
    overflow: hidden;
}

.image-canvas img {
    max-width: 100%;
    max-height: 500px;
    object-fit: contain;
    border-radius: 10px;
    z-index: 2;
}

.placeholder-box {
    text-align: center;
    color: var(--text-muted);
    padding: 40px;
    z-index: 1;
}

.placeholder-box i {
    font-size: 3rem;
    display: block;
    margin-bottom: 15px;
    opacity: 0.5;
}

/* Loading Indicator */
.loading-indicator {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(5, 7, 15, 0.9);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    z-index: 5;
    gap: 15px;
}

.spinner {
    width: 50px;
    height: 50px;
    border: 4px solid rgba(255, 255, 255, 0.1);
    border-left-color: var(--accent-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    100% { transform: rotate(360deg); }
}

/* Image details metadata block */
.image-metadata {
    margin-top: 20px;
    background: var(--input-bg);
    border: 1px solid var(--card-border);
    border-radius: 10px;
    padding: 15px;
    max-height: 160px;
    overflow-y: auto;
}

.image-metadata pre {
    font-family: monospace;
    font-size: 0.85rem;
    white-space: pre-wrap;
    word-break: break-all;
    color: var(--accent-color);
}

.image-actions {
    display: flex;
    gap: 15px;
    margin-top: 15px;
}

.image-actions .btn {
    flex: 1;
    padding: 12px 15px;
    font-size: 0.9rem;
}

/* Notification banner */
.notification {
    position: fixed;
    bottom: 25px;
    left: 50%;
    transform: translate(-50%, 150%);
    background: #0f172a;
    border-left: 4px solid var(--accent-color);
    padding: 12px 24px;
    border-radius: 8px;
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.5);
    z-index: 100;
    font-weight: 500;
    transition: transform 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    display: flex;
    align-items: center;
    gap: 10px;
    max-width: 90vw;
}

.notification.show {
    transform: translate(-50%, 0);
}

.notification.success {
    border-left-color: var(--success-color);
}

.notification.error {
    border-left-color: var(--error-color);
}

/* History Section */
.history-section {
    margin-top: 40px;
}

.history-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
}

.history-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
    gap: 20px;
}

.history-item {
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: 12px;
    overflow: hidden;
    cursor: pointer;
    transition: transform 0.2s ease, border-color 0.2s ease;
}

.history-item:hover {
    transform: translateY(-4px);
    border-color: var(--accent-color);
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.3);
}

.history-item img {
    width: 100%;
    aspect-ratio: 1;
    object-fit: cover;
}

.history-info {
    padding: 10px;
}

.history-prompt {
    font-size: 0.8rem;
    font-weight: 500;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.history-model {
    font-size: 0.72rem;
    color: var(--text-muted);
    margin-top: 2px;
}

.history-empty {
    grid-column: 1 / -1;
    text-align: center;
    padding: 40px;
    color: var(--text-muted);
    font-size: 0.95rem;
}

/* Footer */
footer {
    margin-top: auto;
    padding: 40px 0;
    border-top: 1px solid var(--card-border);
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.9rem;
    color: var(--text-muted);
}

@media (max-width: 768px) {
    header, footer {
        flex-direction: column;
        gap: 15px;
        text-align: center;
    }
    
    .nav-controls {
        width: 100%;
        justify-content: center;
    }
}