/* Variables */
:root {
    --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-serif: 'Playfair Display', 'Times New Roman', serif;
    --color-black: #000000;
    --color-dark: #1a1a1a;
    --color-gray: #6b6b6b;
    --color-light-gray: #f5f5f5;
    --color-white: #ffffff;
    --color-accent: #007aff;
    --radius-soft: 12px;
    --radius-hard: 4px;
    --transition-smooth: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --sidebar-width: 320px;
}

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

html {
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font-primary);
    background: var(--color-white);
    color: var(--color-black);
    line-height: 1.5;
    overflow-x: hidden;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-weight: 600;
    letter-spacing: -0.02em;
}

/* Screen Management */
.screen {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    display: none;
    opacity: 0;
    transition: opacity 0.5s ease;
}

.screen.active {
    display: flex;
    opacity: 1;
}

/* Skip Button */
.skip-btn {
    position: fixed;
    bottom: 32px;
    right: 32px;
    z-index: 1000;
    padding: 12px 20px;
    background: transparent;
    border: 1px solid var(--color-gray);
    border-radius: 100px;
    font-family: var(--font-primary);
    font-size: 14px;
    font-weight: 500;
    color: var(--color-gray);
    cursor: pointer;
    opacity: 0;
    transition: var(--transition-smooth);
    animation: fadeIn 0.5s ease 2s forwards;
}

.skip-btn:hover {
    background: var(--color-light-gray);
    border-color: var(--color-dark);
    color: var(--color-dark);
}

/* Intro Screen */
.intro-screen {
    background: var(--color-white);
    justify-content: center;
    align-items: center;
    flex-direction: column;
}

.intro-content {
    text-align: center;
    max-width: 900px;
    padding: 40px;
}

.intro-line {
    font-size: clamp(36px, 8vw, 72px);
    font-weight: 700;
    line-height: 1.1;
    letter-spacing: -0.03em;
    margin-bottom: 16px;
    opacity: 0;
}

/* Pixel Fade Animation */
@keyframes pixelFade {
    0% {
        opacity: 0;
        filter: blur(8px);
        transform: scale(0.95);
    }
    50% {
        opacity: 0.5;
        filter: blur(2px);
    }
    100% {
        opacity: 1;
        filter: blur(0);
        transform: scale(1);
    }
}

.pixel-fade {
    animation: pixelFade 1.5s cubic-bezier(0.22, 1, 0.36, 1) forwards;
}

/* Fade Up Animation */
@keyframes fadeUp {
    0% {
        opacity: 0;
        transform: translateY(20px);
    }
    100% {
        opacity: 1;
        transform: translateY(0);
    }
}

.fade-up {
    animation: fadeUp 1s cubic-bezier(0.22, 1, 0.36, 1) forwards;
}

#line2 {
    animation-delay: 0.3s;
}

#line3 {
    animation-delay: 0.6s;
}

@keyframes fadeIn {
    to {
        opacity: 1;
    }
}

/* Device Selection Screen */
.device-screen {
    background: var(--color-white);
    flex-direction: column;
    justify-content: center;
    align-items: center;
    padding: 40px;
}

.title {
    font-size: clamp(28px, 5vw, 42px);
    font-weight: 800;
    margin-bottom: 8px;
    letter-spacing: -0.02em;
    padding: 0 20px;
}

.subtitle {
    font-size: 18px;
    color: var(--color-gray);
    margin-bottom: 60px;
    font-weight: 400;
}

.device-options {
    display: flex;
    gap: 60px;
    flex-wrap: wrap;
    justify-content: center;
}

.device-option {
    display: flex;
    flex-direction: column;
    align-items: center;
    cursor: pointer;
    transition: var(--transition-smooth);
    padding: 20px;
    border-radius: var(--radius-soft);
}

.device-option:hover {
    background: var(--color-light-gray);
    transform: translateY(-4px);
}

.device-preview {
    position: relative;
    margin-bottom: 20px;
}

.device-frame {
    background: var(--color-dark);
    border-radius: var(--radius-hard);
    overflow: hidden;
}

.device-screen-preview {
    background: linear-gradient(135deg, #f0f0f0 0%, #e0e0e0 100%);
}

.landscape .device-frame {
    width: 180px;
    height: 100px;
    padding: 4px;
}

.landscape .device-screen-preview {
    width: 100%;
    height: 100%;
    border-radius: 2px;
}

.portrait .device-frame {
    width: 80px;
    height: 140px;
    padding: 4px;
}

.portrait .device-screen-preview {
    width: 100%;
    height: 100%;
    border-radius: 2px;
}

.device-label {
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 4px;
}

.device-ratio {
    font-size: 13px;
    color: var(--color-gray);
}

/* Editor Screen */
.editor-screen {
    background: var(--color-light-gray);
    flex-direction: column;
}

/* Sticky Logo */
.sticky-logo {
    position: fixed;
    top: 20px;
    left: 20px;
    font-size: 20px;
    font-weight: 700;
    letter-spacing: -0.02em;
    color: var(--color-black);
    z-index: 1000;
    background: rgba(255, 255, 255, 0.9);
    padding: 8px 16px;
    border-radius: var(--radius-soft);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
}

@media (max-width: 768px) {
    .sticky-logo {
        display: none;
    }
}

/* Mobile Header */
.mobile-header {
    display: none;
    align-items: center;
    justify-content: space-between;
    padding: 16px 20px;
    background: var(--color-white);
    border-bottom: 1px solid rgba(0,0,0,0.05);
}

.toolbar-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    background: transparent;
    border: none;
    border-radius: 50%;
    cursor: pointer;
    transition: var(--transition-smooth);
    color: var(--color-dark);
}

.toolbar-btn:hover {
    background: var(--color-light-gray);
}

.toolbar-title {
    font-size: 18px;
    font-weight: 600;
}

.hamburger-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 44px;
    height: 44px;
    background: transparent;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    color: var(--color-dark);
}

.hamburger-btn:hover {
    background: var(--color-light-gray);
}

/* Editor Layout */
.editor-layout {
    display: flex;
    flex: 1;
    height: 100%;
    overflow: hidden;
}

/* Canvas Container */
.canvas-container {
    flex: 1;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 40px;
    overflow: auto;
}

.vision-board {
    position: relative;
    background: var(--color-white);
    border-radius: var(--radius-soft);
    overflow: hidden;
    transition: var(--transition-smooth);
}

.vision-board.landscape {
    width: 800px;
    height: 450px;
}

.vision-board.portrait {
    width: 450px;
    height: 800px;
}

/* Masonry Grid */
.masonry-grid {
    width: 100%;
    height: 100%;
    padding: 32px;
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    grid-auto-rows: minmax(80px, auto);
    gap: 16px;
    overflow-y: auto;
}

.portrait .masonry-grid {
    grid-template-columns: repeat(2, 1fr);
}

.grid-item {
    position: relative;
    border-radius: var(--radius-soft);
    overflow: hidden;
    transition: transform 0.2s ease;
    background: var(--color-light-gray);
}

.grid-item:hover {
    transform: scale(1.02);
}

.grid-item img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center;
    display: block;
}

.grid-item .delete-btn {
    position: absolute;
    top: 8px;
    right: 8px;
    width: 28px;
    height: 28px;
    background: rgba(0,0,0,0.6);
    border: none;
    border-radius: 50%;
    color: white;
    cursor: pointer;
    display: none;
    align-items: center;
    justify-content: center;
    font-size: 16px;
    line-height: 1;
}

.grid-item:hover .delete-btn {
    display: flex;
}

.grid-item.span-2 {
    grid-column: span 2;
    grid-row: span 2;
}

.grid-item.span-3 {
    grid-column: span 3;
    grid-row: span 2;
}

/* Paper Overlay */
.paper-overlay {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    z-index: 100;
    pointer-events: auto;
}

.paper-overlay.hidden {
    display: none;
}

.overlay-content {
    position: relative;
}

.paper-frame {
    position: relative;
    width: 300px;
    height: auto;
}

.paper-image {
    width: 100%;
    height: auto;
    display: block;
}

.text-overlay {
    position: absolute;
    top: 58%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 80%;
    min-height: 60px;
    font-family: var(--font-serif);
    font-size: 24px;
    font-weight: 400;
    text-align: center;
    color: var(--color-black);
    background: transparent;
    border: none;
    outline: none;
    resize: none;
    line-height: 1.4;
}

.text-overlay:empty::before {
    content: attr(placeholder);
    color: var(--color-gray);
    opacity: 0.6;
}

/* Sidebar */
.sidebar {
    width: var(--sidebar-width);
    background: var(--color-white);
    border-left: 1px solid rgba(0,0,0,0.05);
    padding: 32px 24px;
    display: flex;
    flex-direction: column;
    gap: 28px;
    overflow-y: auto;
}

.sidebar-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 8px;
    padding-bottom: 16px;
}

.sidebar-logo {
    font-size: 20px;
    font-weight: 700;
    letter-spacing: -0.02em;
    color: var(--color-black);
}

.sidebar-close {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    color: var(--color-gray);
    padding: 8px;
}

.sidebar-section {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.sidebar-label {
    font-size: 13px;
    font-weight: 600;
    color: var(--color-gray);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

/* Image Count Input */
.image-count-input-wrapper {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.image-count-input {
    width: 100%;
    padding: 14px 16px;
    border: 2px solid rgba(0,0,0,0.1);
    border-radius: var(--radius-soft);
    font-family: var(--font-primary);
    font-size: 16px;
    font-weight: 600;
    text-align: center;
    transition: var(--transition-smooth);
    outline: none;
}

.image-count-input:focus {
    border-color: var(--color-black);
}

.image-count-input:invalid {
    border-color: #ff3b30;
}

.image-count-hint {
    font-size: 12px;
    color: var(--color-gray);
    text-align: center;
}

.current-count-display {
    font-size: 13px;
    color: var(--color-dark);
    text-align: center;
    padding: 10px 16px;
    background: var(--color-light-gray);
    border-radius: var(--radius-soft);
    font-weight: 500;
    letter-spacing: 0.02em;
}

/* Grid Preview */
.grid-preview {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.grid-preview-item {
    display: flex;
    flex-direction: column;
    gap: 8px;
    cursor: pointer;
    padding: 12px;
    border-radius: var(--radius-soft);
    border: 2px solid transparent;
    transition: var(--transition-smooth);
}

.grid-preview-item:hover {
    background: var(--color-light-gray);
    border-color: rgba(0,0,0,0.1);
}

.grid-preview-item.active {
    background: var(--color-light-gray);
    border-color: var(--color-black);
}

.preview-grid {
    display: grid;
    gap: 4px;
    width: 100%;
    aspect-ratio: 16/9;
    padding: 8px;
    background: var(--color-light-gray);
    border-radius: 8px;
}

.portrait .preview-grid {
    aspect-ratio: 9/16;
}

.preview-cell {
    background: var(--color-white);
    border-radius: 4px;
    border: 1px solid rgba(0,0,0,0.05);
}

.preview-cell.filled {
    background: var(--color-dark);
}

.preview-cell.span-2 {
    grid-column: span 2;
    grid-row: span 2;
}

.preview-label {
    font-size: 13px;
    font-weight: 500;
    color: var(--color-gray);
    text-align: center;
}

.grid-preview-item.active .preview-label {
    color: var(--color-black);
}

/* Color Options */
.color-options {
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
}

.color-preset {
    width: 44px;
    height: 44px;
    border-radius: 50%;
    cursor: pointer;
    transition: var(--transition-smooth);
    position: relative;
}

.color-preset:hover {
    transform: scale(1.1);
}

.color-preset.custom {
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--color-white);
    border: 2px solid rgba(0,0,0,0.15);
    transition: var(--transition-smooth);
}

.color-preset.custom svg {
    width: 18px;
    height: 18px;
    color: var(--color-dark);
    opacity: 0.7;
}

.color-preset.custom:hover {
    border-color: var(--color-black);
    transform: scale(1.1);
}

.color-preset.custom:hover svg {
    opacity: 1;
}

.color-preset.active::after {
    content: '';
    position: absolute;
    inset: -4px;
    border: 2px solid var(--color-black);
    border-radius: 50%;
}

.color-picker-hidden {
    position: absolute;
    opacity: 0;
    pointer-events: none;
    width: 0;
    height: 0;
}

.color-picker-wrapper {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-top: 12px;
    padding: 12px;
    background: var(--color-light-gray);
    border-radius: var(--radius-soft);
    transition: var(--transition-smooth);
}

.color-picker-wrapper.hidden {
    display: none;
}

.color-picker-visible {
    width: 50px;
    height: 36px;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    padding: 0;
}

.color-picker-visible::-webkit-color-swatch-wrapper {
    padding: 0;
}

.color-picker-visible::-webkit-color-swatch {
    border: 1px solid rgba(0,0,0,0.1);
    border-radius: 6px;
}

.color-ok-btn {
    padding: 10px 24px;
    background: var(--color-black);
    color: var(--color-white);
    border: none;
    border-radius: 100px;
    font-family: var(--font-primary);
    font-size: 13px;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition-smooth);
}

.color-ok-btn:hover {
    background: var(--color-dark);
    transform: translateY(-1px);
}

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

/* Toggle Button */
.toggle-btn {
    display: flex;
    align-items: center;
    gap: 12px;
    background: transparent;
    border: none;
    cursor: pointer;
    padding: 8px 0;
}

.toggle-track {
    width: 48px;
    height: 28px;
    background: rgba(0,0,0,0.1);
    border-radius: 100px;
    position: relative;
    transition: var(--transition-smooth);
}

.toggle-btn.active .toggle-track {
    background: var(--color-black);
}

.toggle-thumb {
    position: absolute;
    top: 3px;
    left: 3px;
    width: 22px;
    height: 22px;
    background: var(--color-white);
    border-radius: 50%;
    transition: var(--transition-smooth);
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.toggle-btn.active .toggle-thumb {
    left: 23px;
}

.toggle-label {
    font-size: 14px;
    font-weight: 500;
    color: var(--color-dark);
}

/* Sidebar Buttons */
.sidebar-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    width: 100%;
    padding: 14px 20px;
    border: none;
    border-radius: 100px;
    font-family: var(--font-primary);
    font-size: 15px;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition-smooth);
}

.sidebar-btn.primary {
    background: var(--color-dark);
    color: var(--color-white);
    border: 2px solid var(--color-dark);
}

.sidebar-btn.primary:hover {
    background: var(--color-black);
    border-color: var(--color-black);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0,0,0,0.15);
}

.sidebar-btn.primary:disabled {
    background: var(--color-light-gray);
    color: var(--color-gray);
    border-color: rgba(0,0,0,0.1);
    cursor: not-allowed;
    transform: none;
    box-shadow: none;
}

.sidebar-btn.secondary {
    background: transparent;
    color: var(--color-dark);
    border: 2px solid var(--color-dark);
}

.sidebar-btn.secondary:hover {
    background: var(--color-light-gray);
}

.upload-section {
    margin-top: auto;
    padding-top: 20px;
    border-top: 1px solid rgba(0,0,0,0.05);
}

.upload-section.primary-action {
    margin-top: 0;
    padding: 20px 24px;
    border-top: none;
    order: -1;
    background: var(--color-light-gray);
    border-radius: var(--radius-soft);
    margin-bottom: 8px;
}

.upload-section.primary-action .sidebar-btn {
    padding: 14px 20px;
    font-size: 15px;
}

.upload-hint {
    font-size: 9px;
    color: var(--color-gray);
    text-align: center;
    margin-top: 8px;
    display: block;
    width: 100%;
    font-weight: 500;
}

/* Grid Header with Randomize Button */
.grid-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.randomize-btn {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 8px 16px;
    background: var(--color-white);
    border: 1px solid rgba(0,0,0,0.15);
    border-radius: 100px;
    font-family: var(--font-primary);
    font-size: 12px;
    font-weight: 500;
    color: var(--color-dark);
    cursor: pointer;
    transition: var(--transition-smooth);
}

.randomize-btn svg {
    width: 14px;
    height: 14px;
    color: var(--color-dark);
}

.randomize-btn:hover {
    background: var(--color-light-gray);
    border-color: var(--color-black);
    transform: translateY(-1px);
}

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

/* Modal */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0,0,0,0.4);
    backdrop-filter: blur(8px);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 2000;
    opacity: 1;
    transition: opacity 0.3s ease;
}

.modal.hidden {
    display: none;
    opacity: 0;
}

.modal-content {
    background: var(--color-white);
    padding: 48px;
    border-radius: var(--radius-soft);
    text-align: center;
    max-width: 420px;
    width: 90%;
    position: relative;
    animation: modalSlideUp 0.3s ease;
}

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

.modal-close {
    position: absolute;
    top: 16px;
    right: 16px;
    background: none;
    border: none;
    cursor: pointer;
    color: var(--color-gray);
    padding: 8px;
    transition: color 0.2s ease;
}

.modal-close:hover {
    color: var(--color-black);
}

.modal-content h2 {
    font-size: 24px;
    margin-bottom: 12px;
}

.modal-content p {
    color: var(--color-gray);
    margin-bottom: 32px;
    font-size: 15px;
}

.email-form {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.email-form input {
    padding: 16px 20px;
    border: 1px solid rgba(0,0,0,0.1);
    border-radius: var(--radius-soft);
    font-family: var(--font-primary);
    font-size: 15px;
    outline: none;
    transition: border-color 0.2s ease;
}

.email-form input:focus {
    border-color: var(--color-black);
}

.submit-btn {
    padding: 16px 24px;
    background: var(--color-black);
    color: var(--color-white);
    border: none;
    border-radius: 100px;
    font-family: var(--font-primary);
    font-size: 15px;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition-smooth);
}

.submit-btn:hover {
    background: var(--color-dark);
    transform: translateY(-2px);
}

.privacy-note {
    font-size: 12px !important;
    color: var(--color-gray) !important;
    margin-top: 24px;
    margin-bottom: 0 !important;
}

/* Processing Modal */
.processing {
    padding: 48px 64px !important;
}

.spinner {
    width: 48px;
    height: 48px;
    border: 3px solid var(--color-light-gray);
    border-top-color: var(--color-black);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin: 0 auto 20px;
}

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

/* Success Modal */
.success-icon {
    color: #34c759;
    margin-bottom: 20px;
}

/* Utility Classes */
.desktop-only {
    display: block;
}

.mobile-only {
    display: none;
}

/* Responsive Design */
@media (max-width: 1024px) {
    .canvas-container {
        padding: 24px;
    }
    
    .vision-board.landscape {
        width: 100%;
        max-width: 600px;
        height: auto;
        aspect-ratio: 16/9;
    }
    
    .vision-board.portrait {
        width: 100%;
        max-width: 340px;
        height: auto;
        aspect-ratio: 9/16;
    }
}

@media (max-width: 768px) {
    .mobile-header {
        display: flex;
    }
    
    .desktop-only {
        display: none !important;
    }
    
    .mobile-only {
        display: block !important;
    }
    
    .editor-layout {
        flex-direction: column;
    }
    
    .sidebar {
        position: fixed;
        top: 0;
        right: -100%;
        width: 100%;
        max-width: 360px;
        height: 100%;
        z-index: 1000;
        border-left: none;
        border-radius: var(--radius-soft) 0 0 var(--radius-soft);
        box-shadow: -4px 0 24px rgba(0,0,0,0.15);
        transition: right 0.3s ease;
    }
    
    .sidebar.open {
        right: 0;
    }
    
    .sidebar-close {
        display: block;
    }
    
    .canvas-container {
        padding: 16px;
        flex: 1;
    }
    
    .masonry-grid {
        padding: 16px;
        gap: 8px;
    }
    
    .device-options {
        gap: 30px;
    }
    
    .modal-content {
        padding: 32px 24px;
    }
    
    .paper-frame {
        width: 240px;
    }
    
    .text-overlay {
        font-size: 20px;
    }
}

@media (max-width: 480px) {
    .intro-content {
        padding: 20px;
    }
    
    .skip-btn {
        bottom: 20px;
        right: 20px;
        padding: 10px 16px;
        font-size: 13px;
    }
    
    .masonry-grid {
        grid-template-columns: repeat(2, 1fr) !important;
        gap: 8px;
        padding: 12px;
    }
    
    .sidebar {
        max-width: none;
        border-radius: 0;
    }
}