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

:root {
    --bg-primary: #0b0f19;
    --bg-secondary: #161d30;
    --bg-card: rgba(255, 255, 255, 0.06);
    --bg-card-hover: rgba(255, 255, 255, 0.12);
    --border-color: rgba(255, 255, 255, 0.1);
    --border-hover: rgba(255, 255, 255, 0.2);
    --accent: #2563eb;
    --accent-glow: rgba(37, 99, 235, 0.4);
    --text-primary: #f8fafc;
    --text-secondary: #94a3b8;
    --text-muted: #64748b;
    --success: #10b981;
    --error: #ef4444;
    --max-width: 1440px;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: 'Inter', sans-serif;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    min-height: 100vh;
    overflow-x: hidden;
    line-height: 1.5;
}

h1, h2, h3, h4, h5, h6 {
    font-family: 'Outfit', sans-serif;
    font-weight: 700;
    letter-spacing: -0.02em;
}

/* App Layout */
.app-container {
    display: flex;
    flex-direction: column;
    min-height: 100vh;
    background: radial-gradient(circle at top right, rgba(37, 99, 235, 0.15), transparent 60%),
                radial-gradient(circle at bottom left, rgba(37, 99, 235, 0.08), transparent 50%);
}

.app-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.25rem 2rem;
    background: rgba(11, 15, 25, 0.5);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 0;
    z-index: 100;
}

.logo-container {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    cursor: pointer;
}

.logo-img {
    height: 36px;
    width: auto;
    filter: drop-shadow(0 0 8px var(--accent-glow));
}

.logo-text {
    font-family: 'Outfit', sans-serif;
    font-size: 1.5rem;
    font-weight: 800;
    background: linear-gradient(135deg, #fff 30%, var(--text-secondary) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.header-actions {
    display: flex;
    align-items: center;
    gap: 1rem;
}

/* Common Components */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.8rem 1.5rem;
    border-radius: 12px;
    font-family: 'Inter', sans-serif;
    font-size: 0.95rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    border: 1px solid transparent;
    text-decoration: none;
    white-space: nowrap;
}

.btn-primary {
    background-color: var(--accent);
    color: #fff;
    box-shadow: 0 4px 14px var(--accent-glow);
}

.btn-primary:hover {
    background-color: #1d4ed8;
    transform: translateY(-1px);
    box-shadow: 0 6px 20px var(--accent-glow);
}

.btn-primary:active {
    transform: translateY(0);
}

.btn-primary:disabled {
    background-color: var(--text-muted);
    box-shadow: none;
    cursor: not-allowed;
    opacity: 0.7;
}

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

.btn-secondary:hover {
    background-color: var(--bg-card-hover);
    border-color: var(--border-hover);
    transform: translateY(-1px);
}

.btn-icon {
    padding: 0.75rem;
    border-radius: 50%;
    width: 42px;
    height: 42px;
}

/* Glass Card */
.card {
    background: var(--bg-card);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid var(--border-color);
    border-radius: 20px;
    padding: 2rem;
    transition: var(--transition);
}

.card:hover {
    border-color: var(--border-hover);
}

/* Page Navigation States */
.page {
    display: none;
    flex: 1;
    width: 100%;
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 2rem;
    animation: fadeIn 0.4s ease-out;
}

.page.active {
    display: flex;
}

/* Splash/Welcome Screen */
#page-welcome {
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-height: calc(100vh - 80px);
    position: relative;
    padding: 0;
    max-width: 100%;
}

.welcome-slideshow {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 1;
    overflow: hidden;
}

.slide {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-size: cover;
    background-position: center;
    opacity: 0;
    transition: opacity 1.5s ease-in-out, transform 5s linear;
    transform: scale(1.0);
}

.slide.active {
    opacity: 1;
    transform: scale(1.05);
}

.welcome-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(to top, rgba(11, 15, 25, 0.95) 20%, rgba(11, 15, 25, 0.4) 100%);
    z-index: 2;
}

.welcome-content {
    position: relative;
    z-index: 3;
    max-width: 800px;
    text-align: center;
    padding: 2rem;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1.75rem;
}

.welcome-logo {
    width: 530px;
    max-width: 100%;
    height: auto;
    margin-bottom: 1rem;
    filter: drop-shadow(0 0 20px var(--accent-glow));
    animation: pulse 3s infinite ease-in-out;
}

.welcome-title {
    font-size: 3rem;
    line-height: 1.1;
    font-weight: 800;
    background: linear-gradient(135deg, #ffffff 40%, #94a3b8 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.welcome-subtitle {
    font-size: 1.1rem;
    color: var(--text-secondary);
}

.space-type-selector {
    display: flex;
    background: rgba(255, 255, 255, 0.08);
    border: 1px solid var(--border-color);
    padding: 0.25rem;
    border-radius: 14px;
    width: 100%;
    max-width: 380px;
}

.space-type-btn {
    flex: 1;
    background: transparent;
    border: none;
    color: var(--text-secondary);
    padding: 0.9rem;
    font-weight: 700;
    font-family: 'Inter', sans-serif;
    font-size: 0.95rem;
    border-radius: 10px;
    cursor: pointer;
    transition: var(--transition);
}

.space-type-btn.active {
    background-color: var(--accent);
    color: #fff;
    box-shadow: 0 4px 10px var(--accent-glow);
}

/* Capture / Upload Screen */
#page-capture.active {
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

@media (min-width: 992px) {
    #page-capture.active {
        display: grid;
        grid-template-columns: 340px 1fr;
        align-items: stretch;
    }
}

.capture-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 2rem;
    width: 100%;
    margin-top: 1rem;
}

@media (min-width: 992px) {
    .capture-grid {
        grid-template-columns: 320px 1fr;
    }
}

.capture-sidebar {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.capture-view-area {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    background: rgba(255, 255, 255, 0.03);
    border: 2px dashed var(--border-color);
    border-radius: 24px;
    min-height: 480px;
    position: relative;
    overflow: hidden;
    transition: var(--transition);
}

.capture-view-area.drag-over {
    border-color: var(--accent);
    background: rgba(37, 99, 235, 0.05);
}

.upload-placeholder {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 1.25rem;
    text-align: center;
    padding: 2rem;
    cursor: pointer;
    width: 100%;
    height: 100%;
}

.upload-icon {
    font-size: 3.5rem;
    color: var(--text-muted);
    transition: var(--transition);
}

.upload-placeholder:hover .upload-icon {
    color: var(--accent);
    transform: translateY(-4px);
}

.upload-placeholder p {
    font-size: 1.1rem;
    font-weight: 500;
}

.upload-placeholder span {
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.preview-container {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-primary);
}

.preview-image {
    max-width: 100%;
    max-height: 100%;
    object-fit: contain;
}

/* Webcam Preview */
.webcam-container {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: #000;
}

.webcam-video {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.webcam-shutter-btn {
    position: absolute;
    bottom: 1.5rem;
    left: 50%;
    transform: translateX(-50%);
    width: 72px;
    height: 72px;
    border-radius: 50%;
    background: white;
    border: 4px solid var(--bg-primary);
    cursor: pointer;
    box-shadow: 0 4px 15px rgba(0,0,0,0.5);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 10;
    transition: var(--transition);
}

.webcam-shutter-btn:hover {
    transform: translateX(-50%) scale(1.05);
}

.webcam-shutter-btn:active {
    transform: translateX(-50%) scale(0.95);
}

.webcam-shutter-inner {
    width: 56px;
    height: 56px;
    border-radius: 50%;
    background: white;
    border: 2px solid var(--bg-primary);
}

.webcam-shutter-btn.recording .webcam-shutter-inner {
    background: var(--error);
    border-radius: 8px;
    width: 32px;
    height: 32px;
}

.capture-controls {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    width: 100%;
}

@media (max-width: 991px) {
    .capture-controls {
        flex-direction: row;
    }
}

.camera-controls-panel {
    display: flex;
    align-items: center;
    gap: 1.5rem;
    padding: 0.75rem 1.5rem;
    background: rgba(0,0,0,0.6);
    border-radius: 30px;
    position: absolute;
    top: 1.5rem;
    z-index: 10;
    backdrop-filter: blur(8px);
}

.camera-select {
    background: transparent;
    border: none;
    color: #fff;
    font-family: inherit;
    font-size: 0.85rem;
    cursor: pointer;
    outline: none;
}

.camera-select option {
    background: var(--bg-secondary);
    color: #fff;
}

/* Style Selection Screen */
#page-style {
    display: none;
    grid-template-columns: 1fr;
    gap: 2rem;
    width: 100%;
    margin-top: 1rem;
}

@media (min-width: 992px) {
    #page-style.active {
        display: grid;
        grid-template-columns: 440px 1fr;
        gap: 2.5rem;
    }
}

.style-sidebar {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
    overflow-y: auto;
    max-height: calc(100vh - 120px);
    padding-right: 0.5rem;
}

.style-sidebar::-webkit-scrollbar {
    width: 6px;
}
.style-sidebar::-webkit-scrollbar-track {
    background: transparent;
}
.style-sidebar::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: 3px;
}

.style-input-preview {
    width: 100%;
    height: 300px;
    border-radius: 16px;
    overflow: hidden;
    position: relative;
    border: 1px solid var(--border-color);
}

.style-input-preview img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.preview-overlay-info {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    padding: 1rem;
    background: linear-gradient(to top, rgba(0,0,0,0.8), transparent);
    display: flex;
    justify-content: space-between;
    align-items: flex-end;
}

.aspect-ratio-controls {
    display: flex;
    background: rgba(0,0,0,0.6);
    backdrop-filter: blur(8px);
    padding: 0.2rem;
    border-radius: 8px;
    gap: 2px;
}

.ratio-btn {
    background: transparent;
    border: none;
    color: rgba(255,255,255,0.6);
    padding: 0.3rem 0.6rem;
    font-size: 0.75rem;
    font-weight: 700;
    border-radius: 6px;
    cursor: pointer;
    transition: var(--transition);
}

.ratio-btn.active {
    background: var(--accent);
    color: #fff;
}

/* Category Chips */
.setting-section {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.section-label {
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--text-secondary);
    font-weight: 700;
}

.chips-container {
    display: flex;
    gap: 0.5rem;
    overflow-x: auto;
    padding: 0.25rem 0;
    scroll-behavior: smooth;
    -webkit-overflow-scrolling: touch;
}

.chips-container::-webkit-scrollbar {
    height: 4px;
}
.chips-container::-webkit-scrollbar-track {
    background: transparent;
}
.chips-container::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: 2px;
}

.chip {
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    padding: 0.6rem 1.2rem;
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 600;
    cursor: pointer;
    white-space: nowrap;
    transition: var(--transition);
}

.chip:hover {
    background-color: var(--bg-card-hover);
    border-color: var(--border-hover);
}

.chip.active {
    background-color: var(--accent);
    border-color: var(--accent);
    box-shadow: 0 2px 8px var(--accent-glow);
}

/* Booth Layout Cards */
.layout-cards {
    display: flex;
    gap: 0.75rem;
    overflow-x: auto;
    padding: 0.25rem 0;
}

.layout-cards::-webkit-scrollbar {
    height: 4px;
}
.layout-cards::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: 2px;
}

.layout-card {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    padding: 0.75rem 1.25rem;
    border-radius: 12px;
    cursor: pointer;
    font-size: 0.85rem;
    font-weight: 600;
    white-space: nowrap;
    transition: var(--transition);
}

.layout-card:hover {
    background: var(--bg-card-hover);
    border-color: var(--border-hover);
}

.layout-card.active {
    background: var(--accent);
    border-color: var(--accent);
}

/* Grid of Styles */
.style-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
    gap: 1.5rem;
    width: 100%;
}

.style-card {
    display: flex;
    flex-direction: column;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 20px;
    overflow: hidden;
    cursor: pointer;
    transition: var(--transition);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.15);
}

.style-card:hover {
    border-color: var(--border-hover);
    transform: translateY(-4px);
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.25);
}

.style-card.active {
    border-color: var(--accent);
    box-shadow: 0 0 0 2px var(--accent), 0 0 20px var(--accent-glow);
}

.style-card-image-container {
    width: 100%;
    aspect-ratio: 1.15;
    overflow: hidden;
    position: relative;
    background-color: rgba(255, 255, 255, 0.02);
    border-bottom: 1px solid var(--border-color);
}

.style-card-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.4s cubic-bezier(0.165, 0.84, 0.44, 1);
}

.style-card:hover .style-card-img {
    transform: scale(1.08);
}

.style-card-name {
    padding: 0.85rem 0.75rem;
    font-size: 0.85rem;
    font-weight: 700;
    text-align: center;
    color: var(--text-primary);
    line-height: 1.35;
    min-height: 2.8rem;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(0, 0, 0, 0.15);
}

.style-card.active .style-card-name {
    color: #fff;
    font-weight: 800;
    background: rgba(37, 99, 235, 0.1);
}

/* Specific details box */
.details-input-container {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    padding: 0.75rem 1rem;
    border-radius: 14px;
    transition: var(--transition);
}

.details-input-container:focus-within {
    border-color: var(--accent);
    box-shadow: 0 0 0 2px var(--accent-glow);
}

.details-input {
    flex: 1;
    background: transparent;
    border: none;
    color: #fff;
    outline: none;
    font-family: inherit;
    font-size: 0.9rem;
}

.details-input::placeholder {
    color: var(--text-muted);
}

.reference-image-btn {
    background: rgba(255,255,255,0.06);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    width: 36px;
    height: 36px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: var(--transition);
}

.reference-image-btn:hover {
    background: var(--accent);
    border-color: var(--accent);
}

.reference-preview {
    width: 36px;
    height: 36px;
    border-radius: 8px;
    overflow: hidden;
    position: relative;
    border: 1px solid var(--border-color);
}

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

.reference-remove-btn {
    position: absolute;
    top: -4px;
    right: -4px;
    width: 16px;
    height: 16px;
    border-radius: 50%;
    background: var(--error);
    color: white;
    font-size: 9px;
    border: none;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
}

/* Sidebar generate panel */
.generate-panel {
    background: rgba(0,0,0,0.3);
    border-radius: 16px;
    padding: 1.25rem;
    border: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.credit-info {
    font-size: 0.75rem;
    color: var(--text-secondary);
    text-align: center;
}

.error-text {
    color: var(--error);
    font-size: 0.8rem;
    text-align: center;
    margin-top: 0.25rem;
}

/* Generating Progress Indicator */
.btn-progress-container {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.progress-spinner {
    width: 18px;
    height: 18px;
    border: 2px solid rgba(255,255,255,0.3);
    border-top-color: white;
    border-radius: 50%;
    animation: spin 1s infinite linear;
}

/* Result Screen */
#page-result {
    display: none;
    grid-template-columns: 1fr;
    gap: 2rem;
    width: 100%;
    margin-top: 1rem;
}

@media (min-width: 992px) {
    #page-result.active {
        display: grid;
        grid-template-columns: 440px 1fr;
        gap: 2.5rem;
    }
}

.result-sidebar {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.style-badge {
    display: inline-block;
    padding: 0.5rem 1rem;
    background: rgba(37, 99, 235, 0.15);
    border: 1px solid rgba(37, 99, 235, 0.3);
    color: #93c5fd;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 700;
    align-self: flex-start;
}

.edit-input-container {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.edit-textarea {
    width: 100%;
    height: 80px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 0.75rem;
    color: #fff;
    font-family: inherit;
    font-size: 0.9rem;
    resize: none;
    outline: none;
    transition: var(--transition);
}

.edit-textarea:focus {
    border-color: var(--accent);
}

.action-buttons-group {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0.75rem;
    width: 100%;
}

.btn-full {
    width: 100%;
}

/* Before / After Slider Container */
.slider-view-area {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 1.5rem;
}

.comparison-slider {
    position: relative;
    width: 100%;
    max-width: 800px;
    aspect-ratio: 1; /* Default to 1:1, matches option */
    border-radius: 24px;
    overflow: hidden;
    border: 1px solid var(--border-color);
    box-shadow: 0 10px 30px rgba(0,0,0,0.5);
    background: var(--bg-secondary);
}

.slider-img {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    pointer-events: none;
}

.slider-img-after {
    z-index: 2;
    clip-path: polygon(0 0, 50% 0, 50% 100%, 0 100%);
}

.slider-img-before {
    z-index: 1;
}

.slider-handle {
    position: absolute;
    top: 0;
    bottom: 0;
    left: 50%;
    width: 4px;
    background: #ffffff;
    z-index: 3;
    cursor: ew-resize;
    transform: translateX(-50%);
    box-shadow: 0 0 10px rgba(0,0,0,0.5);
}

.slider-handle-circle {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 48px;
    height: 48px;
    background: #ffffff;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 4px 10px rgba(0,0,0,0.3);
    color: var(--bg-primary);
    font-size: 1.1rem;
    transition: transform 0.1s ease;
}

.comparison-slider:hover .slider-handle-circle {
    transform: translate(-50%, -50%) scale(1.08);
}

.slider-label {
    position: absolute;
    bottom: 1rem;
    padding: 0.4rem 0.8rem;
    background: rgba(0,0,0,0.6);
    backdrop-filter: blur(4px);
    border-radius: 6px;
    font-size: 0.75rem;
    font-weight: 700;
    z-index: 4;
    pointer-events: none;
    letter-spacing: 0.05em;
    text-transform: uppercase;
}

.slider-label-before {
    left: 1rem;
}

.slider-label-after {
    right: 1rem;
}

/* Modals */
.modal-backdrop {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(11, 15, 25, 0.85);
    backdrop-filter: blur(8px);
    z-index: 1000;
    align-items: center;
    justify-content: center;
    animation: fadeIn 0.3s ease-out;
}

.modal-backdrop.active {
    display: flex;
}

.modal-content {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 24px;
    width: 90%;
    max-width: 480px;
    padding: 2.25rem;
    box-shadow: 0 20px 50px rgba(0,0,0,0.6);
    position: relative;
    animation: scaleUp 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
}

.modal-title {
    font-size: 1.35rem;
    font-weight: 700;
}

.modal-close-btn {
    background: transparent;
    border: none;
    color: var(--text-secondary);
    font-size: 1.2rem;
    cursor: pointer;
    transition: var(--transition);
}

.modal-close-btn:hover {
    color: white;
}

.modal-body {
    display: flex;
    flex-direction: column;
    gap: 1.25rem;
}

.input-group {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.input-label {
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--text-secondary);
}

.text-input {
    width: 100%;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    padding: 0.8rem 1rem;
    border-radius: 12px;
    color: white;
    font-family: inherit;
    font-size: 0.95rem;
    outline: none;
    transition: var(--transition);
}

.text-input:focus {
    border-color: var(--accent);
}

/* Watermark Overlay */
.watermark-overlay {
    position: absolute;
    bottom: 1.25rem;
    right: 1.25rem;
    background: rgba(0,0,0,0.6);
    backdrop-filter: blur(4px);
    padding: 0.4rem 0.8rem;
    border-radius: 8px;
    font-size: 0.75rem;
    font-weight: 700;
    z-index: 5;
    pointer-events: none;
    display: none;
    align-items: center;
    gap: 4px;
}

.watermark-overlay.active {
    display: flex;
}

/* Toast Message */
.toast {
    position: fixed;
    bottom: 2rem;
    left: 50%;
    transform: translate(-50%, 100px);
    background: var(--success);
    color: #fff;
    padding: 0.8rem 1.75rem;
    border-radius: 30px;
    font-weight: 600;
    font-size: 0.9rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    z-index: 2000;
    box-shadow: 0 10px 25px rgba(16, 185, 129, 0.3);
    opacity: 0;
    transition: transform 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275), opacity 0.4s ease;
}

.toast.active {
    transform: translate(-50%, 0);
    opacity: 1;
}

.toast.error {
    background: var(--error);
    box-shadow: 0 10px 25px rgba(239, 68, 68, 0.3);
}

/* Animations */
@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

@keyframes scaleUp {
    from { transform: scale(0.95); opacity: 0; }
    to { transform: scale(1); opacity: 1; }
}

@keyframes spin {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

@keyframes pulse {
    0%, 100% { transform: scale(0.98); opacity: 0.8; }
    50% { transform: scale(1.02); opacity: 1; }
}

/* Screen size adaptations */
@media (max-width: 768px) {
    .app-header {
        padding: 1rem;
    }
    
    .logo-text {
        font-size: 1.25rem;
    }
    
    .page {
        padding: 1rem;
    }
    
    .welcome-title {
        font-size: 2.25rem;
    }
    
    .welcome-content {
        padding: 1rem;
        gap: 1.25rem;
    }
    
    .slider-view-area {
        padding: 0.5rem;
    }
    
    .comparison-slider {
        border-radius: 16px;
    }
}