/* =============================
   Design Tokens & Themes
   ============================= */
:root {
    --color-bg: #0c111c;
    --color-surface: #141b27;
    --color-surface-alt: #1c2533;
    --color-border: #1f2b3a;
    --color-text: #e5edf5;
    --color-text-soft: #9badc2;
    --color-accent: #6366f1;
    --color-accent-alt: #818cf8;
    --color-accent-soft: rgba(99, 102, 241, .12);
    --color-focus: #93c5fd;
    --color-danger: #ef4444;
    --color-warn: #f59e0b;
    --color-ok: #10b981;
    --font-base: 14px;
    --font-xs: 11px;
    --font-sm: 12px;
    --font-md: 14px;
    --font-lg: 16px;
    --font-xl: 20px;
    --font-2xl: clamp(1.6rem, 4vw, 2.1rem);
    --space-1: 4px;
    --space-2: 8px;
    --space-3: 12px;
    --space-4: 16px;
    --space-5: 20px;
    --space-6: 24px;
    --space-8: 32px;
    --space-10: 40px;
    --container-max: 1080px;
    --radius-xs: 4px;
    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 14px;
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, .4);
    --shadow-md: 0 3px 8px -2px rgba(0, 0, 0, .45);
    --shadow-xl: 0 24px 60px rgba(2, 4, 12, .6);
    --ease: cubic-bezier(.4, .2, .2, 1);
    --transition-fast: 120ms var(--ease);
    --transition: 180ms var(--ease);
}

html {
    overflow-y: scroll;
    /* Prevent layout shift */
}

[data-theme="light"] {
    --color-bg: #f8f0e6;
    --color-surface: #efe4d6;
    --color-surface-alt: #e2d5c4;
    --color-border: #cdbfac;
    --color-text: #2f2a21;
    --color-text-soft: #5b5246;
    --color-accent: #a89850;
    --color-accent-alt: #c07870;
    --color-accent-soft: rgba(168, 152, 80, .18);
    --color-focus: #a89850;
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    background: var(--color-bg);
    color: var(--color-text);
    font: var(--font-base)/1.55 ui-sans-serif, system-ui, Segoe UI, Roboto, "Apple SD Gothic Neo";
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    font-feature-settings: "cv02", "cv03", "cv04", "tnum", "ss01";
}

/* Skip link */
.skip-link {
    position: absolute;
    left: -999px;
    top: -999px;
    background: var(--color-accent);
    color: #fff;
    padding: var(--space-2) var(--space-3);
    border-radius: var(--radius-sm);
    font-size: var(--font-sm);
}

.skip-link:focus {
    left: var(--space-4);
    top: var(--space-4);
    outline: 2px solid var(--color-focus);
}

.container {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 var(--space-4);
    animation: fadeIn .4s var(--ease);
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(8px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.tool-card {
    position: relative;
    display: block;
    padding: var(--space-4);
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    cursor: pointer;
    overflow: hidden;
    border-radius: 18px;
    text-decoration: none;
    color: inherit;
    animation: slideUp 0.4s var(--ease) both;
    transition:
        border-color var(--transition),
        box-shadow var(--transition),
        transform var(--transition),
        background var(--transition);
}

.tool-card:nth-child(1) {
    animation-delay: 0.05s;
}

.tool-card:nth-child(2) {
    animation-delay: 0.1s;
}

.tool-card:nth-child(3) {
    animation-delay: 0.15s;
}

.tool-card:nth-child(4) {
    animation-delay: 0.2s;
}

.tool-card:nth-child(5) {
    animation-delay: 0.25s;
}

.tool-card:nth-child(6) {
    animation-delay: 0.3s;
}

.icon-only .material-symbols-rounded+* {
    margin-left: var(--space-1);
}

.card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--space-4);
    transition: background var(--transition), border-color var(--transition);
}

.card:focus-within {
    outline: 2px solid var(--color-focus);
    outline-offset: 2px;
}

.hero {
    position: relative;
    overflow: hidden;
    padding: var(--space-10) var(--space-5);
    margin: var(--space-8) 0;
    border-radius: var(--radius-lg);
    border: 1px solid var(--color-border);
    background: linear-gradient(135deg, rgba(46, 58, 95, .85), rgba(12, 16, 26, .95));
    box-shadow: 0 35px 60px rgba(6, 10, 21, .55);
}

[data-theme="light"] .hero {
    background: linear-gradient(135deg, rgba(168, 152, 80, .14), rgba(255, 255, 255, .95));
    box-shadow: var(--shadow-md);
}

.hero::after {
    content: "";
    position: absolute;
    inset: 0;
    background: radial-gradient(circle at 20% 20%, rgba(99, 102, 241, .35), transparent 55%);
    pointer-events: none;
}

[data-theme="light"] .hero::after {
    background: radial-gradient(circle at 20% 20%, rgba(168, 152, 80, .18), transparent 55%);
}

.hero.tool-hero {
    overflow: hidden;
}

.hero-inner {
    position: relative;
    z-index: 1;
    display: grid;
    gap: var(--space-8);
    grid-template-columns: minmax(0, 1.4fr) minmax(260px, 0.9fr);
    align-items: stretch;
}

/* Hero responsive layout */
@media (max-width: 960px) {
    .hero {
        padding: var(--space-8) var(--space-4);
        margin: var(--space-6) 0;
    }

    .hero-inner {
        grid-template-columns: minmax(0, 1fr);
        /* 1열로 스택 */
        gap: var(--space-6);
        align-items: flex-start;
    }

    .hero-panel {
        margin-top: var(--space-4);
        /* 텍스트 아래로 자연스럽게 */
    }
}

@media (max-width: 640px) {
    .hero {
        padding: var(--space-6) var(--space-4);
    }
}

/* Hero quick guide panels (tool pages) */
.hero .report-entry {
    position: relative;
}

.hero .report-entry .report-panel,
.encoder-hero .report-entry .report-panel,
.keygen-hero .report-entry .report-panel,
.json-hero .report-entry .report-panel {
    left: 0;
    right: auto;
    width: min(360px, calc(100vw - 32px));
    max-width: 100%;
    max-height: min(70vh, 420px);
    overflow-y: auto;
    transform-origin: top left;
}

.hero-copy {
    text-align: left;
}

.hero-description {
    margin-top: var(--space-3);
    font-size: var(--font-lg);
    color: var(--color-text-soft);
    line-height: 1.7;
    max-width: 52ch;
}

.hero-guide {
    margin: 0 0 var(--space-3);
    padding-left: var(--space-4);
    font-size: var(--font-sm);
    color: var(--color-text-soft);
    line-height: 1.6;
}

.hero-inline {
    margin-top: var(--space-4);
    display: grid;
    gap: var(--space-3);
    grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
}

.hero-inline-card {
    padding: var(--space-3);
    border-radius: var(--radius-md);
    background: rgba(15, 23, 42, 0.85);
    border: 1px solid rgba(148, 163, 184, 0.5);
    box-shadow: 0 10px 25px rgba(15, 23, 42, 0.7);
}

[data-theme="light"] .hero-inline-card {
    background: rgba(255, 255, 255, 0.9);
    border-color: rgba(148, 163, 184, 0.6);
    box-shadow: 0 10px 25px rgba(15, 23, 42, 0.12);
}

.hero-inline-card strong {
    display: block;
    font-size: var(--font-xs);
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--color-text-soft);
}

.hero-inline-card span {
    display: block;
    margin-top: 6px;
    font-size: var(--font-md);
    color: var(--color-text);
}

.hero-guide li {
    margin-bottom: 4px;
}

.eyebrow {
    font-size: var(--font-sm);
    text-transform: uppercase;
    letter-spacing: .16em;
    color: var(--color-text-soft);
    margin: 0 0 var(--space-2) 0;
}

.hero-list {
    list-style: none;
    padding: 0;
    margin: var(--space-5) 0 var(--space-6);
    display: flex;
    flex-direction: column;
    gap: var(--space-3);
}

.hero-list li {
    display: flex;
    gap: var(--space-3);
    align-items: flex-start;
    color: var(--color-text-soft);
    line-height: 1.5;
    font-size: var(--font-md);
}

.hero-list .material-symbols-rounded {
    font-size: 22px;
    color: var(--color-accent-alt);
    margin-right: 0;
}

.hero-panel {
    background: rgba(12, 16, 26, .8);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--space-5);
    box-shadow: var(--shadow-md);
}

[data-theme="light"] .hero-panel {
    background: rgba(255, 255, 255, .85);
}

.hero-panel-title {
    font-size: var(--font-sm);
    text-transform: uppercase;
    letter-spacing: .12em;
    color: var(--color-text-soft);
    margin: 0 0 var(--space-3);
}

.hero-panel ul {
    list-style: none;
    padding: 0;
    margin: 0;
    display: flex;
    flex-direction: column;
    gap: var(--space-3);
}

.hero-panel li {
    padding: var(--space-3);
    border-radius: var(--radius-md);
    background: var(--color-surface-alt);
    border: 1px solid var(--color-border);
    font-size: var(--font-sm);
    color: var(--color-text-soft);
    line-height: 1.5;
}

.hero-stats {
    position: relative;
    z-index: 1;
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-3);
    margin-top: var(--space-6);
}

.stat-card {
    flex: 1 1 180px;
    padding: var(--space-4);
    border-radius: var(--radius-md);
    border: 1px solid rgba(255, 255, 255, .1);
    background: rgba(255, 255, 255, .04);
}

[data-theme="light"] .stat-card {
    border-color: var(--color-border);
    background: rgba(255, 255, 255, .8);
}

.stat-value {
    display: block;
    font-size: clamp(1.75rem, 4vw, 2.4rem);
    font-weight: 600;
    color: #fff;
}

[data-theme="light"] .stat-value {
    color: var(--color-text);
}

.stat-label {
    font-size: var(--font-sm);
    color: rgba(229, 237, 245, .8);
}

[data-theme="light"] .stat-label {
    color: var(--color-text-soft);
}

.hero-note {
    font-size: var(--font-sm);
    color: rgba(229, 237, 245, .8);
    margin-top: var(--space-3);
}

[data-theme="light"] .hero-note {
    color: var(--color-text-soft);
}

.tools-section {
    padding: var(--space-6);
    margin-bottom: var(--space-8);
    background: var(--color-surface-alt);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
}

.section-heading {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-3);
    margin-bottom: var(--space-4);
}

.section-title {
    font-size: var(--font-xl);
    margin: 0;
}

.section-description {
    margin: var(--space-2) 0 0;
    font-size: var(--font-md);
    color: var(--color-text-soft);
}

.section-heading .btn {
    white-space: nowrap;
}

.tools-toolbar {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--space-4);
    margin-bottom: var(--space-5);
    box-shadow: var(--shadow-sm);
}

/* Search */
.search {
    display: flex;
    width: 100%;
    margin: 0 0 var(--space-3);
}

.search-field {
    flex: 1;
    height: 48px;
    background: var(--color-surface-alt);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: 0 var(--space-4);
    color: var(--color-text);
    font: inherit;
    box-shadow: inset 0 1px 0 rgba(255, 255, 255, .02);
}

.search-field::placeholder {
    color: var(--color-text-soft);
}

.filter-chips {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-2);
}

.chip {
    border: 1px solid var(--color-border);
    background: transparent;
    color: var(--color-text-soft);
    border-radius: 999px;
    padding: 4px var(--space-3);
    font: inherit;
    font-size: var(--font-sm);
    line-height: 1;
    cursor: pointer;
    transition: border-color var(--transition), color var(--transition), background var(--transition);
}

.chip:hover {
    border-color: var(--color-accent);
    color: var(--color-text);
}

.chip.is-active {
    background: var(--color-accent);
    border-color: var(--color-accent);
    color: #fff;
}

.search-hint {
    margin: var(--space-3) 0 0;
    font-size: var(--font-sm);
    color: var(--color-text-soft);
}

.tools-grid {
    display: grid;
    gap: var(--space-4);
    grid-template-columns: 1fr;
    padding: 0;
}

.tools-grid .tools-feedback {
    grid-column: 1 / -1;
    text-align: center;
    padding: var(--space-6) var(--space-4);
    color: var(--color-text-soft);
    border: 1px dashed var(--color-border);
    border-radius: var(--radius-lg);
    background: var(--color-surface);
}

.tools-grid .tools-loading {
    font-style: italic;
}

/* =============================
   Chat UI
   ============================= */
.chat-window-container {
    display: flex;
    justify-content: center;
    margin-top: var(--space-4);
}

.chat-window {
    width: 100%;
    max-width: 500px;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: 20px;
    box-shadow: var(--shadow-xl);
    overflow: hidden;
    display: flex;
    flex-direction: column;
}

[data-theme="light"] .chat-window {
    background: #fff;
    border-color: rgba(0, 0, 0, 0.08);
}

/* Header */
.chat-header {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    padding: var(--space-3) var(--space-4);
    background: rgba(255, 255, 255, 0.03);
    border-bottom: 1px solid var(--color-border);
    backdrop-filter: blur(8px);
}

[data-theme="light"] .chat-header {
    background: rgba(248, 240, 230, 0.5);
}

.chat-header-avatar {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    overflow: hidden;
    border: 1px solid var(--color-border);
}

.chat-header-avatar img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.chat-header-info {
    flex: 1;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.chat-header-name {
    font-weight: 600;
    font-size: var(--font-sm);
    color: var(--color-text);
}

.chat-header-status {
    font-size: 11px;
    color: var(--color-ok);
    display: flex;
    align-items: center;
    gap: 4px;
}

.chat-header-status::before {
    content: "";
    display: block;
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: currentColor;
}

.chat-header-actions {
    color: var(--color-accent);
    cursor: pointer;
    opacity: 0.8;
}

/* Body */
.chat-body {
    padding: var(--space-4);
    display: flex;
    flex-direction: column;
    gap: var(--space-4);
    background: var(--color-bg);
}

[data-theme="light"] .chat-body {
    background: #fdfaf6;
}

.chat-date-divider {
    text-align: center;
    margin: var(--space-2) 0;
    position: relative;
}

.chat-date-divider span {
    background: rgba(0, 0, 0, 0.2);
    padding: 4px 12px;
    border-radius: 99px;
    font-size: 11px;
    color: rgba(255, 255, 255, 0.7);
}

[data-theme="light"] .chat-date-divider span {
    background: rgba(0, 0, 0, 0.06);
    color: var(--color-text-soft);
}

/* Messages */
.chat-message {
    display: flex;
    gap: var(--space-2);
    max-width: 85%;
    opacity: 0;
    transform: translateY(10px);
    transition: opacity 0.4s var(--ease), transform 0.4s var(--ease);
}

.chat-message.is-visible {
    opacity: 1;
    transform: translateY(0);
}

.chat-message.message-sent {
    align-self: flex-end;
    flex-direction: row-reverse;
}

.chat-message.message-received {
    align-self: flex-start;
}

.message-avatar {
    width: 28px;
    height: 28px;
    border-radius: 50%;
    overflow: hidden;
    flex-shrink: 0;
    margin-top: auto;
    /* Bottom align avatar */
    border: 1px solid var(--color-border);
    background: var(--color-surface);
}

.message-avatar img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.message-content {
    display: flex;
    flex-direction: column;
    gap: 4px;
    align-items: flex-start;
}

.message-sent .message-content {
    align-items: flex-end;
}

.message-bubble {
    padding: 10px 14px;
    border-radius: 18px;
    font-size: var(--font-md);
    line-height: 1.5;
    position: relative;
    box-shadow: var(--shadow-sm);
}

/* Received Bubble */
.message-received .message-bubble {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-bottom-left-radius: 4px;
    /* Tail effect */
    color: var(--color-text);
}

[data-theme="light"] .message-received .message-bubble {
    background: #fff;
    border-color: rgba(0, 0, 0, 0.06);
}

/* Sent Bubble */
.message-sent .message-bubble {
    background: var(--color-accent);
    color: #fff;
    border-bottom-right-radius: 4px;
    /* Tail effect */
}

.message-bubble p {
    margin: 0 0 6px;
}

.message-bubble p:last-child {
    margin: 0;
}

.message-meta {
    font-size: 10px;
    color: var(--color-text-soft);
    opacity: 0.8;
    margin: 0 2px;
}

/* Footer (Input) */
.chat-footer {
    padding: var(--space-2) var(--space-3);
    background: var(--color-surface);
    border-top: 1px solid var(--color-border);
}

[data-theme="light"] .chat-footer {
    background: #fff;
}

.chat-input-wrapper {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: 24px;
    padding: 6px 12px;
}

[data-theme="light"] .chat-input-wrapper {
    background: #f2f2f2;
    border-color: transparent;
}

.fake-input {
    flex: 1;
    font-size: var(--font-sm);
    color: var(--color-text-soft);
    padding: 4px 0;
}

.icon-attach,
.icon-send {
    font-size: 20px;
    color: var(--color-text-soft);
    cursor: default;
}

.icon-send {
    color: var(--color-accent);
}

.timeline {
    display: flex;
    flex-direction: column;
    gap: var(--space-4);
}

.timeline-item {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--space-4);
    box-shadow: var(--shadow-sm);
}

.timeline-meta {
    display: flex;
    gap: var(--space-2);
    align-items: center;
    margin-bottom: var(--space-2);
}

.timeline-version {
    font-weight: 600;
    color: var(--color-accent);
}

.timeline-item ul {
    margin: var(--space-3) 0 0;
    padding-left: var(--space-4);
    color: var(--color-text-soft);
    font-size: var(--font-sm);
}

@media (min-width:640px) {
    .tools-grid {
        grid-template-columns: 1fr 1fr;
    }
}

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

.tool-card::after {
    content: "";
    position: absolute;
    inset: 0;
    border-radius: inherit;
    box-shadow: 0 0 0 0 var(--color-accent-soft);
    opacity: 0;
    transition: box-shadow var(--transition), opacity var(--transition);
    pointer-events: none;
}

.tool-card:hover {
    border-color: var(--color-accent);
    box-shadow: 0 18px 40px rgba(15, 23, 42, 0.65);
    transform: translateY(-2px);
}

.tool-card:hover::after {
    box-shadow: 0 0 0 1px var(--color-accent-soft);
    opacity: 1;
}

.tool-card.is-hidden {
    display: none !important;
}

.tool-card:active {
    transform: scale(.995);
}

.tool-icon {
    width: 44px;
    height: 44px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    background: radial-gradient(circle at 30% 20%, rgba(255, 255, 255, 0.18), transparent 55%), rgba(15, 23, 42, 0.9);
    border: 1px solid rgba(148, 163, 184, 0.35);
    box-shadow: 0 10px 25px rgba(15, 23, 42, 0.7);
}

[data-theme="light"] .tool-icon {
    background: radial-gradient(circle at 30% 20%, rgba(255, 255, 255, 0.9), transparent 55%), rgba(248, 240, 230, 0.95);
    border-color: rgba(148, 163, 184, 0.35);
    box-shadow: 0 8px 18px rgba(15, 23, 42, 0.15);
}

.tool-inner {
    display: flex;
    flex-direction: column;
    gap: var(--space-3);
}

.tool-header {
    display: flex;
    gap: var(--space-3);
    align-items: flex-start;
}

.tool-heading {
    flex: 1;
}

.tool-kicker {
    display: inline-block;
    font-size: var(--font-xs);
    text-transform: uppercase;
    letter-spacing: .2em;
    color: var(--color-text-soft);
    margin-bottom: var(--space-1);
}

.tool-title-row {
    display: flex;
    align-items: center;
    gap: var(--space-2);
}

.tool-meta {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-2);
}

.tool-content h3 {
    margin: 0 0 2px 0;
    font-size: var(--font-lg);
    font-weight: 600;
    color: var(--color-text);
}

.tool-content p {
    margin: 0;
    font-size: var(--font-sm);
    color: var(--color-text-soft);
    line-height: 1.4;
}

.tool-desc {
    margin: 0;
    font-size: var(--font-sm);
    color: var(--color-text-soft);
    line-height: 1.4;
}

.tool-tags {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-2);
    margin-top: var(--space-3);
}

.tool-tag {
    font-size: var(--font-xs);
    line-height: 1;
    padding: 4px var(--space-2);
    border-radius: var(--radius-xs);
    background: rgba(99, 102, 241, .12);
    color: var(--color-accent-alt);
}

.tool-arrow {
    font-size: 16px;
    color: var(--color-text-soft);
    opacity: .85;
    margin-left: auto;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 28px;
    height: 28px;
    border-radius: 999px;
    background: rgba(15, 23, 42, 0.9);
    border: 1px solid transparent;
}

[data-theme="light"] .tool-arrow {
    background: rgba(255, 255, 255, 0.9);
}

.tool-card:hover .tool-arrow {
    color: var(--color-accent);
    border-color: rgba(99, 102, 241, 0.45);
}

/* Arrow icon size */
.tool-arrow .material-symbols-rounded {
    font-size: 20px;
}

.tool-footer {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-2);
    margin-top: var(--space-3);
}

.tool-footer .tool-tags {
    margin-top: 0;
    max-width: calc(100% - 40px);
}

.row {
    display: flex;
    gap: var(--space-2);
    flex-wrap: wrap;
}

label {
    font-weight: 600;
    font-size: var(--font-sm);
    color: var(--color-text-soft);
}

textarea,
select,
input[type=text],
input[type=number] {
    width: 100%;
    min-height: 120px;
    background: var(--color-surface-alt);
    color: var(--color-text);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: var(--space-3);
    font: inherit;
}

.btn {
    padding: var(--space-2) var(--space-4);
    border: 1px solid var(--color-border);
    background: var(--color-surface);
    color: var(--color-text);
    border-radius: var(--radius-md);
    cursor: pointer;
    text-decoration: none;
    font-weight: 500;
    line-height: 1.2;
    transition: background var(--transition), border-color var(--transition), color var(--transition);
}

.btn:hover {
    background: var(--color-surface-alt);
    border-color: var(--color-accent);
}

.btn:active {
    background: var(--color-surface-alt);
}

.btn:disabled,
.btn[disabled] {
    opacity: 0.55;
    cursor: not-allowed;
    border-color: var(--color-border);
    background: var(--color-surface-alt);
    color: var(--color-text-soft);
    box-shadow: none;
}

.btn.primary {
    background: var(--color-accent);
    color: #fff;
    border-color: var(--color-accent);
}

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

.btn.ghost {
    background: transparent;
}

.btn.ghost:hover {
    background: var(--color-surface-alt);
}

/* Semantic variants */
.btn.ok {
    background: var(--color-ok);
    border-color: var(--color-ok);
    color: #fff;
}

.btn.ok:hover {
    filter: brightness(1.05);
}

.btn.warn {
    background: var(--color-warn);
    border-color: var(--color-warn);
    color: #111;
}

.btn.warn:hover {
    filter: brightness(1.05);
}

textarea,
select,
input {
    transition: border-color var(--transition), box-shadow var(--transition);
}

.material-symbols-rounded {
    font-variation-settings: 'FILL' 0, 'wght' 500, 'GRAD' 0, 'opsz' 24;
    vertical-align: middle;
}

.tool-icon .material-symbols-rounded {
    font-size: 28px;
}

.to-top .material-symbols-rounded {
    font-size: 22px;
}

/* Buttons with leading icons */
.btn .material-symbols-rounded {
    font-size: 18px;
    margin-right: 6px;
}

.hero-actions {
    display: inline-flex;
    flex-wrap: wrap;
    justify-content: flex-start;
    align-items: center;
    gap: var(--space-3);
    margin-top: var(--space-5);
}

@media (max-width: 720px) {
    .hero-copy {
        text-align: center;
    }

    .hero-actions {
        justify-content: center;
        width: 100%;
    }
}

/* No search results message */
.no-results {
    display: none;
    text-align: center;
    padding: var(--space-8) var(--space-4);
    color: var(--color-text-soft);
    font-size: var(--font-md);
}

.no-results.show {
    display: block;
}

.badge {
    font-size: var(--font-xs);
    padding: 2px 6px;
    border-radius: 999px;
    background: var(--color-surface-alt);
    border: 1px solid var(--color-border);
    color: var(--color-text-soft);
}

.small {
    font-size: var(--font-xs);
    color: var(--color-text-soft);
}

.mono {
    font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", monospace;
}

.notice {
    padding: var(--space-3);
    border: 1px solid var(--color-border);
    background: var(--color-surface-alt);
    border-radius: var(--radius-md);
}

.h1 {
    font-weight: 600;
    font-size: var(--font-2xl);
    line-height: 1.25;
    margin: 0;
    letter-spacing: -.5px;
}

hr {
    border: 0;
    border-top: 1px solid var(--color-border);
    margin: var(--space-4) 0;
}

/* Back to top */
.to-top {
    position: fixed;
    right: 16px;
    bottom: 16px;
    width: 40px;
    height: 40px;
    border-radius: 999px;
    border: 1px solid var(--color-border);
    background: var(--color-surface);
    color: var(--color-text);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow-sm);
    cursor: pointer;
    opacity: 0;
    transform: translateY(10px);
    visibility: hidden;
    transition: opacity .2s var(--ease), transform .2s var(--ease), visibility .2s;
}

.to-top.show {
    opacity: 1;
    transform: translateY(0);
    visibility: visible;
}

.to-top:hover {
    border-color: var(--color-accent);
}

html {
    scroll-behavior: smooth;
}

/* Focus */
:focus-visible {
    outline: 2px solid var(--color-focus);
    outline-offset: 2px;
}

/* Reduced Motion */
@media (prefers-reduced-motion:reduce) {

    *,
    *::before,
    *::after {
        animation-duration: .001ms !important;
        animation-iteration-count: 1 !important;
        transition: none !important;
    }
}

@keyframes slideDown {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes report-button-wiggle {
    0% {
        transform: translateY(0);
    }

    25% {
        transform: translateY(-1px);
    }

    50% {
        transform: translateY(1px);
    }

    75% {
        transform: translateY(-0.5px);
    }

    100% {
        transform: translateY(0);
    }
}