@import url('https://fonts.googleapis.com/css2?family=Playfair+Display:wght@400;500;600&family=DM+Sans:wght@300;400;500;600&family=DM+Mono:wght@400;500&display=swap');

:root {
    --bg: #f5f2ee;
    --bg-card: #fdfcfa;
    --bg-input: #f0ede8;
    --text: #1a1714;
    --text-muted: #7a7570;
    --text-light: #b0aaa4;
    --accent: #c4602a;
    --accent-light: #e8d5c8;
    --accent-hover: #a84f22;
    --border: #e0dbd4;
    --border-strong: #c8c2ba;
    --success: #3a7d5a;
    --error: #b84040;
    --shadow-sm: 0 1px 3px rgba(26,23,20,0.06), 0 4px 12px rgba(26,23,20,0.04);
    --shadow-md: 0 2px 8px rgba(26,23,20,0.08), 0 12px 32px rgba(26,23,20,0.06);
    --shadow-lg: 0 4px 16px rgba(26,23,20,0.1), 0 24px 64px rgba(26,23,20,0.08);
    --radius: 4px;
    --radius-lg: 8px;
}

[data-theme="dark"] {
    --bg: #141210;
    --bg-card: #1c1916;
    --bg-input: #221f1c;
    --text: #f0ede8;
    --text-muted: #958f88;
    --text-light: #5a5550;
    --accent: #d4703a;
    --accent-light: #2a1f18;
    --accent-hover: #e07d46;
    --border: #2a2520;
    --border-strong: #3a332c;
    --shadow-sm: 0 1px 3px rgba(0,0,0,0.3), 0 4px 12px rgba(0,0,0,0.2);
    --shadow-md: 0 2px 8px rgba(0,0,0,0.4), 0 12px 32px rgba(0,0,0,0.3);
    --shadow-lg: 0 4px 16px rgba(0,0,0,0.5), 0 24px 64px rgba(0,0,0,0.4);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'DM Sans', sans-serif;
    background: var(--bg);
    color: var(--text);
    min-height: 100vh;
    line-height: 1.6;
    transition: background 0.4s, color 0.4s;
}

/* Subtle paper texture overlay */
body::before {
    content: '';
    position: fixed;
    inset: 0;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='200' height='200'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3CfeColorMatrix type='saturate' values='0'/%3E%3C/filter%3E%3Crect width='200' height='200' filter='url(%23n)' opacity='0.025'/%3E%3C/svg%3E");
    pointer-events: none;
    z-index: 0;
    opacity: 0.5;
}

/* Theme Toggle */
.theme-toggle {
    position: fixed;
    top: 28px;
    right: 28px;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: var(--bg-card);
    border: 1px solid var(--border);
    color: var(--text-muted);
    font-size: 14px;
    cursor: pointer;
    box-shadow: var(--shadow-sm);
    transition: all 0.25s ease;
    z-index: 1000;
    display: flex;
    align-items: center;
    justify-content: center;
}

.theme-toggle:hover {
    color: var(--accent);
    border-color: var(--border-strong);
    box-shadow: var(--shadow-md);
}

/* Layout */
.container {
    max-width: 720px;
    margin: 0 auto;
    padding: 80px 24px 60px;
    position: relative;
    z-index: 1;
}

/* Header */
.header {
    margin-bottom: 56px;
    animation: fadeUp 0.7s cubic-bezier(0.16, 1, 0.3, 1) both;
}

.logo {
    display: flex;
    align-items: baseline;
    gap: 12px;
    margin-bottom: 10px;
}

.logo i {
    font-size: 1.5rem;
    color: var(--accent);
    position: relative;
    top: 2px;
}

.logo h1 {
    font-family: 'Playfair Display', serif;
    font-size: 2.75rem;
    font-weight: 500;
    color: var(--text);
    letter-spacing: -0.02em;
    line-height: 1;
}

.header-rule {
    width: 40px;
    height: 2px;
    background: var(--accent);
    margin: 16px 0;
    border: none;
}

.subtitle {
    color: var(--text-muted);
    font-size: 1rem;
    font-weight: 400;
    margin-bottom: 10px;
}

.about {
    color: var(--text-muted);
    font-size: 0.875rem;
    line-height: 1.7;
    max-width: 520px;
}

.about i {
    display: none;
}

/* Card */
.card {
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border);
    box-shadow: var(--shadow-md);
    overflow: hidden;
    margin-bottom: 24px;
    animation: fadeUp 0.7s cubic-bezier(0.16, 1, 0.3, 1) 0.1s both;
}

.card > form,
.card > .summary-results-inner {
    padding: 40px;
}

/* Input Tabs */
.input-tabs {
    display: flex;
    gap: 0;
    margin-bottom: 32px;
    border-bottom: 1px solid var(--border);
}

.tab-btn {
    flex: 1;
    padding: 12px 20px;
    background: transparent;
    border: none;
    border-bottom: 2px solid transparent;
    margin-bottom: -1px;
    color: var(--text-muted);
    font-family: 'DM Sans', sans-serif;
    font-size: 0.875rem;
    font-weight: 500;
    letter-spacing: 0.02em;
    cursor: pointer;
    transition: all 0.2s;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    font-size: 0.75rem;
}

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

.tab-btn.active {
    color: var(--accent);
    border-bottom-color: var(--accent);
}

.tab-content {
    display: none;
}

.tab-content.active {
    display: block;
}

/* Form */
.form-group {
    margin-bottom: 28px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    color: var(--text);
    font-weight: 500;
    font-size: 0.8125rem;
    letter-spacing: 0.06em;
    text-transform: uppercase;
}

.form-group label i {
    display: none;
}

/* File Upload */
.file-upload-wrapper {
    position: relative;
}

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

.file-upload-display {
    border: 1.5px dashed var(--border-strong);
    border-radius: var(--radius-lg);
    padding: 40px 24px;
    text-align: center;
    background: var(--bg-input);
    transition: all 0.25s ease;
    cursor: pointer;
}

.file-upload-display:hover {
    border-color: var(--accent);
    background: var(--accent-light);
}

.file-upload-display i {
    font-size: 2rem;
    color: var(--text-light);
    margin-bottom: 12px;
    display: block;
    transition: color 0.25s;
}

.file-upload-display:hover i {
    color: var(--accent);
}

.file-upload-display span {
    display: block;
    color: var(--text-muted);
    font-size: 0.9375rem;
    font-weight: 400;
    margin-bottom: 6px;
}

.file-upload-display small {
    color: var(--text-light);
    font-size: 0.8125rem;
    font-family: 'DM Mono', monospace;
}

/* Text Input */
.text-input {
    width: 100%;
    padding: 14px 16px;
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    font-size: 0.9375rem;
    font-family: 'DM Sans', sans-serif;
    background: var(--bg-input);
    color: var(--text);
    resize: vertical;
    transition: all 0.2s;
    line-height: 1.7;
    min-height: 200px;
}

.text-input:focus {
    outline: none;
    border-color: var(--accent);
    background: var(--bg-card);
    box-shadow: 0 0 0 3px var(--accent-light);
}

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

.char-counter {
    display: block;
    margin-top: 6px;
    color: var(--text-light);
    font-size: 0.75rem;
    font-family: 'DM Mono', monospace;
    text-align: right;
}

/* Select wrapper */
.select-wrapper {
    position: relative;
}

.select-wrapper::after {
    content: '';
    position: absolute;
    right: 16px;
    top: 50%;
    transform: translateY(-50%);
    width: 0;
    height: 0;
    border-left: 5px solid transparent;
    border-right: 5px solid transparent;
    border-top: 5px solid var(--text-muted);
    pointer-events: none;
}

/* Select */
.select-input {
    width: 100%;
    padding: 13px 44px 13px 16px;
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    font-size: 0.9375rem;
    font-family: 'DM Sans', sans-serif;
    background-color: var(--bg-input);
    color: var(--text);
    cursor: pointer;
    transition: border-color 0.2s, box-shadow 0.2s, background-color 0.2s;
    -webkit-appearance: none;
    -moz-appearance: none;
    appearance: none;
    background-image: none;
    background-repeat: no-repeat;
    background-position: right 14px center;
    background-size: 16px 16px;
    line-height: 1.5;
}

.select-input:focus {
    outline: none;
    border-color: var(--accent);
    background-color: var(--bg-card);
    box-shadow: 0 0 0 3px var(--accent-light);
}

/* Submit Button */
.btn {
    width: 100%;
    padding: 15px 24px;
    border: none;
    border-radius: var(--radius-lg);
    font-family: 'DM Sans', sans-serif;
    font-size: 0.875rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.25s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    -webkit-appearance: none;
    appearance: none;
}

.btn-primary {
    background: var(--accent);
    color: #fff !important;
    box-shadow: 0 2px 8px rgba(196, 96, 42, 0.3);
}

.btn-primary:hover {
    background: var(--accent-hover);
    transform: translateY(-1px);
    box-shadow: 0 4px 16px rgba(196, 96, 42, 0.4);
}

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

/* Spinner */
.spinner-container {
    text-align: center;
    padding: 40px 20px;
    display: none;
    margin: 24px 0 0;
}

.spinner-container.htmx-indicator {
    display: block !important;
}

.htmx-request .spinner-container {
    display: block !important;
}

.spinner {
    position: relative;
    width: 56px;
    height: 56px;
    margin: 0 auto 20px;
}

.spinner-ring {
    position: absolute;
    width: 100%;
    height: 100%;
    border: 2px solid var(--border);
    border-top-color: var(--accent);
    border-radius: 50%;
    animation: spin 0.9s linear infinite;
}

.spinner i {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    font-size: 1.25rem;
    color: var(--accent);
    animation: pulse 1.5s ease-in-out infinite;
}

.loading-text {
    color: var(--text-muted);
    font-size: 0.875rem;
    font-family: 'DM Mono', monospace;
    letter-spacing: 0.04em;
}

/* Results */
.summary-results {
    animation: fadeUp 0.5s cubic-bezier(0.16, 1, 0.3, 1) both;
}

.summary-results-inner {
    padding: 40px;
}

.result-label {
    font-size: 0.6875rem;
    font-weight: 600;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--accent);
    font-family: 'DM Mono', monospace;
    margin-bottom: 8px;
}

.summary-box {
    margin-bottom: 32px;
    padding-bottom: 32px;
    border-bottom: 1px solid var(--border);
}

.summary-box:last-of-type {
    border-bottom: none;
    margin-bottom: 0;
    padding-bottom: 0;
}

.summary-box h3 {
    font-family: 'Playfair Display', serif;
    color: var(--text);
    margin-bottom: 16px;
    font-size: 1.375rem;
    font-weight: 500;
    letter-spacing: -0.01em;
    display: flex;
    align-items: center;
    gap: 10px;
}

.summary-box h3 i {
    color: var(--accent);
    font-size: 1rem;
}

.summary-content {
    white-space: pre-wrap;
    line-height: 1.8;
    color: var(--text-muted);
    font-size: 0.9375rem;
    word-wrap: break-word;
}

/* Export */
.export-section {
    margin-top: 32px;
    padding-top: 32px;
    border-top: 1px solid var(--border);
}

.export-section h3 {
    font-size: 0.6875rem;
    font-weight: 600;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--text-muted);
    font-family: 'DM Mono', monospace;
    margin-bottom: 14px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.export-section h3 i {
    color: var(--accent);
}

.export-buttons {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.export-btn {
    padding: 8px 16px;
    background: var(--bg-input);
    border: 1px solid var(--border);
    color: var(--text-muted);
    border-radius: var(--radius);
    cursor: pointer;
    font-family: 'DM Mono', monospace;
    font-size: 0.75rem;
    font-weight: 500;
    letter-spacing: 0.06em;
    transition: all 0.2s;
    display: flex;
    align-items: center;
    gap: 6px;
    text-transform: uppercase;
}

.export-btn:hover {
    background: var(--accent);
    color: #fff;
    border-color: var(--accent);
    transform: translateY(-1px);
    box-shadow: 0 2px 8px rgba(196, 96, 42, 0.2);
}

/* Error */
.error-message {
    background: rgba(184, 64, 64, 0.06);
    border: 1px solid rgba(184, 64, 64, 0.25);
    color: var(--error);
    padding: 16px 20px;
    border-radius: var(--radius-lg);
    margin-top: 20px;
    display: flex;
    align-items: flex-start;
    gap: 12px;
    font-size: 0.9rem;
    animation: shake 0.4s ease;
}

.error-message i {
    font-size: 1rem;
    margin-top: 2px;
    flex-shrink: 0;
}

/* Footer */
.footer {
    margin-top: 80px;
    padding-top: 40px;
    border-top: 1px solid var(--border);
    animation: fadeUp 0.7s cubic-bezier(0.16, 1, 0.3, 1) 0.2s both;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 40px;
    margin-bottom: 40px;
}

.footer-section h4 {
    font-size: 0.6875rem;
    font-weight: 600;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--text);
    font-family: 'DM Mono', monospace;
    margin-bottom: 12px;
    display: flex;
    align-items: center;
    gap: 6px;
}

.footer-section h4 i {
    color: var(--accent);
    font-size: 0.75rem;
}

.footer-section p {
    color: var(--text-muted);
    font-size: 0.875rem;
    line-height: 1.7;
}

.footer-section ul {
    list-style: none;
    color: var(--text-muted);
    font-size: 0.875rem;
}

.footer-section ul li {
    padding: 4px 0;
    display: flex;
    align-items: center;
    gap: 8px;
}

.footer-section ul li::before {
    content: "–";
    color: var(--accent);
    font-weight: 300;
}

.footer-bottom {
    padding-top: 24px;
    border-top: 1px solid var(--border);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.footer-bottom p {
    color: var(--text-light);
    font-size: 0.8125rem;
    font-family: 'DM Mono', monospace;
}

/* Animations */
@keyframes fadeUp {
    from {
        opacity: 0;
        transform: translateY(16px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

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

@keyframes pulse {
    0%, 100% { opacity: 1; transform: translate(-50%, -50%) scale(1); }
    50% { opacity: 0.6; transform: translate(-50%, -50%) scale(1.1); }
}

@keyframes shake {
    0%, 100% { transform: translateX(0); }
    20% { transform: translateX(-6px); }
    60% { transform: translateX(6px); }
}

@media (max-width: 768px) {
    .container {
        padding: 60px 20px 48px;
    }

    .logo h1 {
        font-size: 2.25rem;
    }

    .card > form,
    .card > .summary-results-inner {
        padding: 28px 24px;
    }

    .input-tabs {
        flex-direction: row;
    }

    .footer-content {
        grid-template-columns: 1fr;
        gap: 28px;
    }

    .export-buttons {
        flex-wrap: wrap;
    }

    .theme-toggle {
        top: 20px;
        right: 20px;
    }
}