@import url('https://fonts.googleapis.com/css2?family=DM+Mono:wght@400;500&family=Syne:wght@400;600;700;800&display=swap');

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

:root {
    --bg:        #f5f5fb;
    --bg2:       #ffffff;
    --bg3:       #ededf5;
    --border:    #dcdcee;
    --border2:   #c4c4dc;
    --text:      #18182c;
    --text2:     #44446a;
    --text3:     #8080a8;
    --accent:    #6d28d9;
    --accent2:   #5b21b6;
    --green:     #059669;
    --yellow:    #d97706;
    --red:       #dc2626;
    --radius:    8px;
    --font-main: 'Syne', sans-serif;
    --font-mono: 'DM Mono', monospace;
}

html { font-size: 14px; }
body {
    background: var(--bg);
    color: var(--text);
    font-family: var(--font-main);
    min-height: 100vh;
    line-height: 1.5;
}

.app-header {
    padding: 20px 32px 16px;
    border-bottom: 1px solid var(--border);
    display: flex;
    align-items: baseline;
    gap: 24px;
    background: var(--bg2);
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
}

.logo-dot {
    width: 14px; height: 14px;
    border-radius: 50%;
    background: conic-gradient(#f87171, #fbbf24, #34d399, #60a5fa, #a78bfa, #f87171);
    animation: spin 4s linear infinite;
    flex-shrink: 0;
}

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

.logo-text {
    font-size: 2.5rem;
    font-weight: 800;
    letter-spacing: -0.5px;
    color: var(--text);
}

.header-sub {
    color: var(--text3);
    font-family: var(--font-mono);
    font-size: 1.5rem;
    letter-spacing: 0.04em;
}

.app-layout {
    display: grid;
    grid-template-columns: 300px 1fr 300px;
    gap: 0;
    min-height: calc(100vh - 65px);
    align-items: start;
}

.panel {
    padding: 24px 20px;
    border-right: 1px solid var(--border);
    height: 100%;
}

.panel-left  { background: var(--bg2); }
.panel-center { background: var(--bg); }
.panel-right { background: var(--bg2); border-right: none; }

.panel-title {
    font-size: 1.0rem;
    font-weight: 700;
    letter-spacing: 0.14em;
    text-transform: uppercase;
    color: var(--text3);
    margin-bottom: 20px;
    padding-bottom: 8px;
    border-bottom: 1px solid var(--border);
}

.picker-zone {
    position: relative;
    margin-bottom: 24px;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
}

.color-preview-large {
    width: 100%;
    height: 100px;
    border-radius: var(--radius);
    background: #3b82f6;
    border: 1px solid var(--border2);
    transition: background 0.3s ease;
    cursor: pointer;
}

.native-picker {
    position: absolute;
    width: 100%;
    height: 100px;
    top: 0;
    opacity: 0;
    cursor: pointer;
}

.picker-label {
    font-size: 1.0rem;
    color: var(--text3);
    font-family: var(--font-mono);
    text-align: center;
}

.input-group {
    margin-bottom: 16px;
}

.field-label {
    display: block;
    font-size: 1.0rem;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--text3);
    margin-bottom: 6px;
    font-weight: 600;
}

.input-row {
    display: flex;
    gap: 6px;
}

.input-row.triple { gap: 4px; }

.field-input {
    flex: 1;
    background: var(--bg3);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    color: var(--text);
    font-family: var(--font-mono);
    font-size: 1.0rem;
    padding: 8px 10px;
    transition: border-color 0.2s, background 0.2s;
    outline: none;
}

.field-input:focus {
    border-color: var(--accent);
    background: rgba(109, 40, 217, 0.04);
}

.field-input.small { min-width: 0; text-align: center; }

.btn-convert {
    background: var(--bg3);
    border: 1px solid var(--border2);
    border-radius: var(--radius);
    color: var(--accent);
    font-size: 1.0rem;
    padding: 6px 14px;
    cursor: pointer;
    transition: background 0.2s, border-color 0.2s;
    font-weight: 700;
    flex-shrink: 0;
}

.btn-convert:hover {
    background: rgba(109, 40, 217, 0.08);
    border-color: var(--accent);
}

.error-msg {
    display: block;
    color: var(--red);
    font-size: 1.0rem;
    font-family: var(--font-mono);
    margin-top: 6px;
}

.results-block { animation: fadeUp 0.3s ease; }

@keyframes fadeUp {
    from { opacity: 0; transform: translateY(8px); }
    to   { opacity: 1; transform: translateY(0); }
}

.swatch-hero {
    width: 100%;
    height: 140px;
    border-radius: var(--radius);
    background: #3b82f6;
    border: 1px solid var(--border2);
    display: flex;
    align-items: flex-end;
    padding: 12px 14px;
    margin-bottom: 20px;
    transition: background 0.4s ease;
}

.swatch-label {
    font-family: var(--font-mono);
    font-size: 1.0rem;
    font-weight: 500;
    color: rgba(255,255,255,0.85);
    text-shadow: 0 1px 4px rgba(0,0,0,0.5);
    mix-blend-mode: normal;
    filter: drop-shadow(0 0 6px rgba(0,0,0,0.6));
}

.conversion-grid {
    display: flex;
    flex-direction: column;
    gap: 6px;
    margin-bottom: 24px;
}

.conv-item {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 9px 12px;
    background: var(--bg3);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    transition: border-color 0.2s;
}

.conv-item:hover { border-color: var(--border2); }

.conv-key {
    font-size: 1.0rem;
    font-weight: 700;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--text3);
    min-width: 52px;
}

.conv-val {
    font-family: var(--font-mono);
    font-size: 1.0rem;
    color: var(--text);
    flex: 1;
    word-break: break-all;
}

.conv-val.small { font-size: 1.0rem; color: var(--text2); }

.copy-btn {
    background: none;
    border: 1px solid var(--border);
    border-radius: 4px;
    color: var(--text3);
    font-size: 1.0rem;
    padding: 2px 7px;
    cursor: pointer;
    transition: color 0.2s, border-color 0.2s, background 0.2s;
    flex-shrink: 0;
}

.copy-btn:hover {
    color: var(--accent);
    border-color: var(--accent);
    background: rgba(109, 40, 217, 0.06);
}

.a11y-block { margin-top: 4px; }

.sub-title {
    font-size: 1.0rem;
    font-weight: 700;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--text3);
    margin-bottom: 10px;
}

.a11y-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }

.a11y-card {
    border: 1px solid var(--border);
    border-radius: var(--radius);
    overflow: hidden;
}

.a11y-preview {
    padding: 16px 12px;
    font-family: var(--font-mono);
    font-size: 1.0rem;
    text-align: center;
}

.a11y-info {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 6px 10px;
    background: var(--bg3);
    border-top: 1px solid var(--border);
    font-size: 1.0rem;
    color: var(--text2);
}

.a11y-badge {
    font-size: 1.0rem;
    font-weight: 700;
    padding: 2px 8px;
    border-radius: 100px;
    letter-spacing: 0.08em;
}

.badge-aaa { background: rgba(5, 150, 105, 0.12);  color: var(--green); border: 1px solid rgba(5,150,105,0.4); }
.badge-aa  { background: rgba(37, 99, 235, 0.10);  color: #2563eb;      border: 1px solid rgba(37,99,235,0.4); }
.badge-aal { background: rgba(217,119,  6, 0.10);  color: var(--yellow); border: 1px solid rgba(217,119,6,0.4); }
.badge-fail{ background: rgba(220, 38, 38, 0.10); color: var(--red);    border: 1px solid rgba(220,38,38,0.4); }

.empty-state {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 60px 20px;
    color: var(--text3);
    text-align: center;
    gap: 12px;
}

.empty-state.small { padding: 40px 20px; }

.empty-icon {
    font-size: 2.5rem;
    opacity: 0.3;
    animation: pulse 2.5s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 0.2; }
    50%       { opacity: 0.5; }
}

.empty-state p {
    font-size: 1.0rem;
    font-family: var(--font-mono);
    color: var(--text3);
    max-width: 180px;
    line-height: 1.5;
}

.palette-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    margin-bottom: 16px;
}

.btn-palette {
    background: var(--bg3);
    border: 1px solid var(--border);
    border-radius: 100px;
    color: var(--text2);
    font-size: 1.0rem;
    font-family: var(--font-main);
    font-weight: 600;
    letter-spacing: 0.04em;
    padding: 5px 12px;
    cursor: pointer;
    transition: all 0.2s;
}

.btn-palette:hover {
    border-color: var(--accent);
    color: var(--accent);
    background: rgba(109, 40, 217, 0.06);
}

.palette-name {
    display: block;
    font-size: 1.0rem;
    font-weight: 600;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--text3);
    margin-bottom: 10px;
}

.palette-strip {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 24px;
}

.palette-chip {
    width: 52px;
    height: 52px;
    border-radius: 6px;
    cursor: pointer;
    position: relative;
    border: 1px solid rgba(255,255,255,0.08);
    transition: transform 0.15s, box-shadow 0.15s;
    overflow: hidden;
}

.palette-chip:hover {
    transform: scale(1.08);
    box-shadow: 0 4px 16px rgba(0,0,0,0.4);
}

.chip-label {
    position: absolute;
    bottom: 0; left: 0; right: 0;
    background: rgba(0,0,0,0.7);
    color: #fff;
    font-size: 1.0rem;
    font-family: var(--font-mono);
    text-align: center;
    padding: 2px 0;
    opacity: 0;
    transition: opacity 0.2s;
}

.palette-chip:hover .chip-label { opacity: 1; }

.gradient-section { margin-bottom: 24px; }

.gradient-preview {
    width: 100%;
    height: 64px;
    border-radius: var(--radius);
    border: 1px solid var(--border2);
    margin-bottom: 8px;
    background: linear-gradient(135deg, #3b82f6, #a78bfa);
    transition: background 0.5s ease;
}

.gradient-code {
    display: flex;
    align-items: flex-start;
    gap: 8px;
}

.code-block {
    flex: 1;
    background: var(--bg3);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 8px 10px;
    font-family: var(--font-mono);
    font-size: 1.0rem;
    color: var(--text2);
    word-break: break-all;
    display: block;
    line-height: 1.6;
}

.save-section {}

.save-row {
    display: flex;
    gap: 6px;
    margin-bottom: 14px;
}

.btn-save {
    background: rgba(109, 40, 217, 0.08);
    border: 1px solid rgba(109, 40, 217, 0.25);
    border-radius: var(--radius);
    color: var(--accent);
    font-family: var(--font-main);
    font-size: 1.0rem;
    font-weight: 700;
    padding: 8px 12px;
    cursor: pointer;
    white-space: nowrap;
    transition: background 0.2s, border-color 0.2s;
}

.btn-save:hover {
    background: rgba(109, 40, 217, 0.15);
    border-color: var(--accent);
}

.saved-list {
    display: flex;
    flex-direction: column;
    gap: 6px;
    max-height: 280px;
    overflow-y: auto;
    padding-right: 4px;
}

.saved-list::-webkit-scrollbar { width: 4px; }
.saved-list::-webkit-scrollbar-track { background: var(--bg3); }
.saved-list::-webkit-scrollbar-thumb { background: var(--border2); border-radius: 2px; }

.saved-item {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 8px 10px;
    background: var(--bg3);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    transition: border-color 0.2s;
}

.saved-item:hover { border-color: var(--border2); }

.saved-swatch {
    width: 28px; height: 28px;
    border-radius: 4px;
    flex-shrink: 0;
    border: 1px solid rgba(255,255,255,0.08);
}

.saved-info {
    flex: 1;
    min-width: 0;
}

.saved-name {
    display: block;
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.saved-hex {
    display: block;
    font-family: var(--font-mono);
    font-size: 1.0rem;
    color: var(--text3);
}

.btn-delete {
    background: none;
    border: none;
    color: var(--text3);
    font-size: 1.0rem;
    cursor: pointer;
    padding: 4px;
    border-radius: 4px;
    transition: color 0.2s, background 0.2s;
    text-decoration: none;
}

.btn-delete:hover {
    color: var(--red);
    background: rgba(248, 113, 113, 0.1);
}

.btn-clear {
    display: block;
    width: 100%;
    margin-top: 10px;
    background: none;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    color: var(--text3);
    font-size: 1.0rem;
    font-family: var(--font-main);
    letter-spacing: 0.06em;
    padding: 7px;
    cursor: pointer;
    transition: color 0.2s, border-color 0.2s;
}

.btn-clear:hover {
    color: var(--red);
    border-color: rgba(248, 113, 113, 0.4);
}

.toast {
    position: fixed;
    bottom: 28px;
    left: 50%;
    transform: translateX(-50%) translateY(20px);
    background: var(--accent2);
    color: #fff;
    font-family: var(--font-mono);
    font-size: 1.0rem;
    padding: 8px 20px;
    border-radius: 100px;
    opacity: 0;
    transition: opacity 0.25s, transform 0.25s;
    pointer-events: none;
    z-index: 999;
}

.toast.show {
    opacity: 1;
    transform: translateX(-50%) translateY(0);
}

@media (max-width: 1024px) {
    .app-layout {
        grid-template-columns: 1fr 1fr;
        grid-template-rows: auto auto;
    }
    .panel-right { grid-column: 1 / -1; border-right: none; border-top: 1px solid var(--border); }
}

@media (max-width: 640px) {
    .app-layout { grid-template-columns: 1fr; }
    .panel { border-right: none; border-bottom: 1px solid var(--border); }
    .a11y-grid { grid-template-columns: 1fr; }
}