/* ============================================
   postmarked - travel postcard creator
   ============================================ */

:root {
    /* colors - warm, travel-inspired palette */
    --bg: #faf8f5;
    --bg-subtle: #f3f0eb;
    --text: #2c2825;
    --text-muted: #8a8580;
    --accent: #c45c3e;
    --accent-hover: #a84a30;
    --border: #e5e0d8;
    --white: #ffffff;
    --shadow: rgba(44, 40, 37, 0.08);
    
    /* typography */
    --font-sans: 'DM Sans', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-serif: 'Playfair Display', Georgia, serif;
    
    /* spacing */
    --space-xs: 0.25rem;
    --space-sm: 0.5rem;
    --space-md: 1rem;
    --space-lg: 1.5rem;
    --space-xl: 2rem;
    --space-2xl: 3rem;
    --space-3xl: 4rem;
    
    /* radius */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 16px;
    
    /* transitions */
    --transition: 0.2s ease;
}

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

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

body {
    font-family: var(--font-sans);
    font-weight: 400;
    color: var(--text);
    background: var(--bg);
    line-height: 1.6;
    min-height: 100vh;
}

/* app container */
.app {
    display: flex;
    flex-direction: column;
    min-height: 100vh;
    max-width: 480px;
    margin: 0 auto;
    padding: var(--space-lg);
}

/* header */
.header {
    text-align: center;
    padding: var(--space-xl) 0;
}

.logo-row {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-sm);
    flex-wrap: wrap;
}

.deco {
    color: var(--text-muted);
    opacity: 0.6;
}

.deco-bird {
    transform: rotate(-15deg);
    animation: float 3s ease-in-out infinite;
}

.deco-wave {
    font-size: 1.25rem;
    font-weight: 300;
}

.deco-camera,
.deco-sun {
    margin-left: var(--space-xs);
}

@keyframes float {
    0%, 100% { transform: rotate(-15deg) translateY(0); }
    50% { transform: rotate(-10deg) translateY(-3px); }
}

.logo {
    font-family: var(--font-serif);
    font-size: 1.75rem;
    font-weight: 400;
    font-style: italic;
    color: var(--text);
    letter-spacing: -0.02em;
}

.tagline {
    font-size: 0.875rem;
    color: var(--text-muted);
    margin-top: var(--space-sm);
    font-style: italic;
}

/* main */
.main {
    flex: 1;
    display: flex;
    flex-direction: column;
}

/* steps */
.step {
    display: none;
    animation: fadeIn 0.3s ease;
}

.step.active {
    display: block;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

.step-content {
    display: flex;
    flex-direction: column;
    gap: var(--space-lg);
}

.step-number {
    font-size: 0.75rem;
    color: var(--text-muted);
    letter-spacing: 0.1em;
}

.step h2 {
    font-family: var(--font-serif);
    font-size: 1.5rem;
    font-weight: 400;
    margin-top: calc(-1 * var(--space-sm));
}

.step-description {
    color: var(--text-muted);
    font-size: 0.9375rem;
    margin-top: calc(-1 * var(--space-sm));
}

/* upload zone */
/* scalloped upload zone - cloud/stamp-like border */
.upload-zone {
    position: relative;
    padding: var(--space-sm);
    text-align: center;
    cursor: pointer;
    transition: var(--transition);
}

.upload-zone.scalloped {
    background: transparent;
}

.upload-zone-inner {
    background: var(--white);
    border-radius: 50px;
    padding: var(--space-2xl) var(--space-xl);
    border: 2px solid var(--border);
    position: relative;
    
    /* scalloped edge effect using radial gradients */
    --scallop-size: 12px;
    background: 
        radial-gradient(circle at 50% 0%, var(--bg) var(--scallop-size), transparent var(--scallop-size)),
        radial-gradient(circle at 50% 100%, var(--bg) var(--scallop-size), transparent var(--scallop-size)),
        var(--white);
    background-size: 24px 24px, 24px 24px, 100% 100%;
    background-position: top center, bottom center, 0 0;
    background-repeat: repeat-x, repeat-x, no-repeat;
}

.upload-zone:hover .upload-zone-inner,
.upload-zone.dragover .upload-zone-inner {
    border-color: var(--accent);
    box-shadow: 0 4px 20px rgba(196, 92, 62, 0.1);
}

.upload-icon {
    color: var(--text-muted);
    margin-bottom: var(--space-md);
    opacity: 0.7;
}

.upload-icon svg {
    display: block;
    margin: 0 auto;
}

.upload-text {
    font-size: 0.9375rem;
    color: var(--text);
}

.upload-link {
    color: var(--accent);
    cursor: pointer;
}

.upload-hint {
    font-size: 0.8125rem;
    color: var(--text-muted);
    margin-top: var(--space-sm);
}

/* preview grid */
.preview-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-sm);
}

.preview-item {
    position: relative;
    aspect-ratio: 1;
    border-radius: var(--radius-md);
    overflow: hidden;
    background: var(--bg-subtle);
}

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

.preview-remove {
    position: absolute;
    top: var(--space-xs);
    right: var(--space-xs);
    width: 24px;
    height: 24px;
    border-radius: 50%;
    background: var(--white);
    border: none;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 14px;
    color: var(--text-muted);
    transition: var(--transition);
    box-shadow: 0 2px 4px var(--shadow);
}

.preview-remove:hover {
    color: var(--accent);
}

/* form elements */
.form-group {
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
}

.form-group label {
    font-size: 0.875rem;
    color: var(--text);
}

.form-group .optional {
    color: var(--text-muted);
}

.form-group input,
.form-group textarea {
    font-family: var(--font-sans);
    font-size: 1rem;
    padding: var(--space-md);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    background: var(--white);
    color: var(--text);
    transition: var(--transition);
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--accent);
}

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

.form-group textarea {
    resize: none;
    height: 80px;
}

/* style options */
.style-options {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--space-sm);
}

.style-btn {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-xs);
    padding: var(--space-md) var(--space-sm);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    background: var(--white);
    cursor: pointer;
    transition: var(--transition);
}

.style-btn:hover {
    border-color: var(--text-muted);
}

.style-btn.active {
    border-color: var(--accent);
    background: rgba(196, 92, 62, 0.04);
}

.style-icon {
    font-size: 1.25rem;
}

.style-name {
    font-size: 0.75rem;
    color: var(--text-muted);
}

.style-btn.active .style-name {
    color: var(--accent);
}

/* buttons */
.btn {
    font-family: var(--font-sans);
    font-size: 0.9375rem;
    font-weight: 500;
    padding: var(--space-md) var(--space-xl);
    border-radius: var(--radius-md);
    border: none;
    cursor: pointer;
    transition: var(--transition);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-sm);
}

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.btn-primary {
    background: var(--accent);
    color: var(--white);
}

.btn-primary:hover:not(:disabled) {
    background: var(--accent-hover);
}

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

.btn-secondary:hover:not(:disabled) {
    border-color: var(--text-muted);
}

.btn-text {
    background: transparent;
    color: var(--text-muted);
    padding: var(--space-sm);
}

.btn-text:hover {
    color: var(--text);
}

.btn-group {
    display: flex;
    gap: var(--space-sm);
}

.btn-group .btn {
    flex: 1;
}

/* generating state */
.generating-content {
    text-align: center;
    padding: var(--space-3xl) 0;
}

.loader {
    margin-bottom: var(--space-lg);
}

.loader-stamp {
    font-size: 3rem;
    animation: stamp 1.5s ease-in-out infinite;
}

@keyframes stamp {
    0%, 100% { transform: translateY(0) rotate(0deg); }
    50% { transform: translateY(-15px) rotate(-5deg); }
}

.generating-status {
    color: var(--text-muted);
    font-size: 0.9375rem;
}

/* postcard result */
.postcard {
    background: var(--white);
    border-radius: var(--radius-xl);
    overflow: hidden;
    box-shadow: 0 8px 32px var(--shadow);
}

.postcard-image-container {
    aspect-ratio: 1;
    background: var(--bg-subtle);
}

.postcard-image {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.postcard-text {
    padding: var(--space-lg);
    text-align: center;
}

.postcard-location {
    font-family: var(--font-serif);
    font-size: 1.125rem;
    font-weight: 500;
    margin-bottom: var(--space-sm);
}

.postcard-caption {
    font-size: 0.9375rem;
    color: var(--text-muted);
    font-style: italic;
}

/* result actions */
.result-actions {
    display: flex;
    gap: var(--space-sm);
    margin-top: var(--space-lg);
}

.result-actions .btn {
    flex: 1;
}

#btn-start-over {
    width: 100%;
    margin-top: var(--space-sm);
}

/* footer */
.footer {
    text-align: center;
    padding: var(--space-xl) 0;
    font-size: 0.8125rem;
    color: var(--text-muted);
}

.footer a {
    color: var(--text-muted);
    text-decoration: underline;
    text-underline-offset: 2px;
}

.footer a:hover {
    color: var(--text);
}

/* responsive */
@media (max-width: 480px) {
    .app {
        padding: var(--space-md);
    }
    
    .style-options {
        grid-template-columns: repeat(2, 1fr);
    }
}

/* error state */
.error-message {
    background: #fef2f2;
    color: #b91c1c;
    padding: var(--space-md);
    border-radius: var(--radius-md);
    font-size: 0.875rem;
    text-align: center;
}