/* === MEOWRHINO UKULELE TUNER — 5 ELEMENTS × 4 THEMES === */

/* ============================================
   ELEMENT MODES — define color palettes
   ============================================ */

/* Wu Xing: 火 Fire = RED (vermillion) — Most Yang */
[data-mode="fuego"] {
    --accent: #c83c23;
    --accent-dim: #6b1e12;
    --accent-glow: rgba(200,60,35,0.3);
    --bg-light: #fef0ee;
    --bg-dark: #1a0604;
    --text-light: #3d0f0a;
    --text-dark: #ffc4b5;
    --border-light: #d06850;
    --border-dark: #c83c23;
    --g-color: #ff8866;
    --c-color: #c83c23;
    --e-color: #e85540;
    --a-color: #ffc4b5;
    --in-tune: #e85540;
}

/* Wu Xing: 土 Earth = YELLOW/GOLD — Center/Balance */
[data-mode="tierra"] {
    --accent: #d4a017;
    --accent-dim: #7a5c0e;
    --accent-glow: rgba(212,160,23,0.3);
    --bg-light: #fdf6e3;
    --bg-dark: #14100a;
    --text-light: #3d2800;
    --text-dark: #f0d888;
    --border-light: #c49520;
    --border-dark: #d4a017;
    --g-color: #e8c44a;
    --c-color: #d4a017;
    --e-color: #a07830;
    --a-color: #f0d888;
    --in-tune: #d4a017;
}

/* Wu Xing: 金 Metal = WHITE/SILVER — Lesser Yin */
[data-mode="metal"] {
    --accent: #b8b8c8;
    --accent-dim: #60607a;
    --accent-glow: rgba(184,184,200,0.2);
    --bg-light: #f4f4f8;
    --bg-dark: #08080c;
    --text-light: #1a1a24;
    --text-dark: #d8d8e4;
    --border-light: #a0a0b0;
    --border-dark: #b8b8c8;
    --g-color: #d0d0d8;
    --c-color: #b8b8c8;
    --e-color: #8888a0;
    --a-color: #e4e4ec;
    --in-tune: #b8b8c8;
}

/* Wu Xing: 水 Water = BLACK/INK — Most Yin */
[data-mode="agua"] {
    --accent: #2c4a7c;
    --accent-dim: #182840;
    --accent-glow: rgba(44,74,124,0.3);
    --bg-light: #eef2f8;
    --bg-dark: #06080e;
    --text-light: #0a1628;
    --text-dark: #8aa0c4;
    --border-light: #6080a8;
    --border-dark: #3a5a88;
    --g-color: #6888b0;
    --c-color: #2c4a7c;
    --e-color: #1e3460;
    --a-color: #8aa0c4;
    --in-tune: #4a6ea0;
}

/* Wu Xing: 木 Wood = GREEN/TEAL (青 qīng) — Lesser Yang */
[data-mode="madera"] {
    --accent: #2d8b6f;
    --accent-dim: #1a5040;
    --accent-glow: rgba(45,139,111,0.25);
    --bg-light: #eef6f2;
    --bg-dark: #060e0b;
    --text-light: #0a2e20;
    --text-dark: #a0d8c0;
    --border-light: #2d8b6f;
    --border-dark: #2d8b6f;
    --g-color: #55b898;
    --c-color: #2d8b6f;
    --e-color: #1e6b50;
    --a-color: #a0d8c0;
    --in-tune: #2d8b6f;
}

/* ============================================
   THEMES — define structural style + colors
   ============================================ */

/* BRUTAL: neobrutalist, cream, thick borders, hard shadows */
[data-theme="brutal"] {
    --bg: #fffce8;
    --text: #1a1a1a;
    --border: #1a1a1a;
    --border-w: 3px;
    --shadow: 5px 5px 0 #1a1a1a;
    --shadow-hover: 7px 7px 0 #1a1a1a;
    --shadow-active: 2px 2px 0 #1a1a1a;
    --radius: 0px;
    --font-head: 'Space Mono', monospace;
    --meter-track: #e0dcc8;
}

/* MINIMAL: refined, white, rounded, soft shadows */
[data-theme="minimal"] {
    --bg: #ffffff;
    --text: #1a1a1a;
    --border: #d0d0d0;
    --border-w: 1px;
    --shadow: 0 2px 8px rgba(0,0,0,0.06);
    --shadow-hover: 0 6px 16px rgba(0,0,0,0.1);
    --shadow-active: 0 1px 3px rgba(0,0,0,0.04);
    --radius: 14px;
    --font-head: 'Inknut Antiqua', serif;
    --meter-track: #f3f4f6;
}

/* CLARO: element-tinted light, atmospheric */
[data-theme="claro"] {
    --bg: var(--bg-light);
    --text: var(--text-light);
    --border: var(--border-light);
    --border-w: 1px;
    --shadow: 0 2px 10px rgba(0,0,0,0.05);
    --shadow-hover: 0 4px 14px rgba(0,0,0,0.08);
    --shadow-active: 0 1px 4px rgba(0,0,0,0.03);
    --radius: 6px;
    --font-head: 'Space Mono', monospace;
    --meter-track: rgba(0,0,0,0.06);
}

/* OSCURO: dark cinematic, 9-slice frames, glow */
[data-theme="oscuro"] {
    --bg: var(--bg-dark);
    --text: var(--text-dark);
    --border: var(--border-dark);
    --border-w: 0px;
    --shadow: none;
    --shadow-hover: 0 0 20px var(--accent-glow);
    --shadow-active: none;
    --radius: 0px;
    --font-head: 'Space Mono', monospace;
    --meter-track: rgba(255,255,255,0.06);
}

/* ============================================
   ELEMENT STRUCTURAL IDENTITY
   Each element defines its own shape, texture,
   animation, and typography — NOT just colors.
   ============================================ */

/* --- FUEGO: aggressive, volcanic, flickering --- */
[data-mode="fuego"] {
    --el-radius: 0px;
    --el-font: 'Space Mono', monospace;
    --el-transform: skewX(-1deg);
    --el-text-transform: uppercase;
    --el-letter-spacing: 0.08em;
}
[data-mode="fuego"] .tuner-display {
    background:
        radial-gradient(ellipse at 50% 120%, var(--accent-glow) 0%, transparent 60%),
        var(--bg);
    border-radius: 0;
    position: relative;
}
[data-mode="fuego"] .tuner-display::after {
    content: '';
    position: absolute; inset: 0;
    background: repeating-linear-gradient(
        0deg,
        transparent 0px,
        rgba(200,60,35,0.03) 2px,
        transparent 4px
    );
    pointer-events: none;
}
[data-mode="fuego"] .note-display {
    text-shadow: 0 0 30px var(--accent-glow), 0 0 60px var(--accent-glow);
    font-family: 'Space Mono', monospace;
    animation: fuego-flicker 3s ease-in-out infinite;
}
[data-mode="fuego"] .string-btn {
    border-radius: 0;
    transform: skewX(-2deg);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}
[data-mode="fuego"] .string-btn::after {
    content: '';
    position: absolute; bottom: 0; left: 0; right: 0;
    height: 0; background: linear-gradient(to top, var(--accent-glow), transparent);
    transition: height 0.4s ease;
    pointer-events: none;
}
@media (hover: hover) {
    [data-mode="fuego"] .string-btn:hover::after { height: 100%; }
    [data-mode="fuego"] .string-btn:hover { box-shadow: 0 0 20px var(--accent-glow), var(--shadow); }
}
[data-mode="fuego"] .mic-btn,
[data-mode="fuego"] .ref-btn {
    border-radius: 0;
    transform: skewX(-2deg);
    text-transform: uppercase;
}
[data-mode="fuego"] .mic-btn.active {
    box-shadow: 0 0 20px var(--accent-glow), 0 0 40px var(--accent-glow);
    animation: fuego-pulse 1.5s ease-in-out infinite;
}
[data-mode="fuego"] .meter { border-radius: 0; }
[data-mode="fuego"] .settings-btn { border-radius: 0; }
[data-mode="fuego"] .settings-panel { border-radius: 0; }
[data-mode="fuego"] .frequency,
[data-mode="fuego"] .cents { font-family: 'Space Mono', monospace; }

/* --- TIERRA: organic, round, earthy, grounded --- */
[data-mode="tierra"] {
    --el-radius: 20px;
    --el-font: 'Inknut Antiqua', serif;
    --el-transform: none;
    --el-text-transform: lowercase;
    --el-letter-spacing: 0.02em;
}
[data-mode="tierra"] .tuner-display {
    border-radius: 24px;
    background:
        radial-gradient(circle at 30% 80%, rgba(212,160,23,0.08) 0%, transparent 50%),
        radial-gradient(circle at 70% 20%, rgba(212,160,23,0.05) 0%, transparent 50%),
        var(--bg);
    box-shadow: var(--shadow), inset 0 2px 8px rgba(0,0,0,0.04);
    position: relative;
}
[data-mode="tierra"] .tuner-display::after {
    content: '';
    position: absolute; inset: 0;
    border-radius: 24px;
    background: url("data:image/svg+xml,%3Csvg width='6' height='6' xmlns='http://www.w3.org/2000/svg'%3E%3Ccircle cx='1' cy='1' r='0.5' fill='%23000' opacity='0.03'/%3E%3C/svg%3E");
    pointer-events: none;
}
[data-mode="tierra"] .note-display {
    font-family: 'Inknut Antiqua', serif;
    animation: tierra-breathe 4s ease-in-out infinite;
}
[data-mode="tierra"] .string-btn {
    border-radius: 16px;
    text-transform: lowercase;
    font-family: 'Inknut Antiqua', serif;
    box-shadow: var(--shadow), inset 0 1px 4px rgba(0,0,0,0.04);
}
[data-mode="tierra"] .string-note { font-family: 'Inknut Antiqua', serif; }
[data-mode="tierra"] .mic-btn,
[data-mode="tierra"] .ref-btn {
    border-radius: 20px;
    text-transform: lowercase;
    font-family: 'Inknut Antiqua', serif;
}
[data-mode="tierra"] .meter { border-radius: 10px; }
[data-mode="tierra"] .settings-btn { border-radius: 50%; }
[data-mode="tierra"] .settings-panel { border-radius: 20px; }
[data-mode="tierra"] .frequency,
[data-mode="tierra"] .cents { font-family: 'Inknut Antiqua', serif; }

/* --- METAL: industrial, precise, cold, mechanical --- */
[data-mode="metal"] {
    --el-radius: 0px;
    --el-font: 'Space Mono', monospace;
    --el-transform: none;
    --el-text-transform: uppercase;
    --el-letter-spacing: 0.15em;
}
[data-mode="metal"] .tuner-display {
    border-radius: 0;
    background:
        repeating-linear-gradient(
            90deg,
            transparent 0px,
            rgba(160,160,184,0.03) 1px,
            transparent 2px,
            transparent 4px
        ),
        repeating-linear-gradient(
            0deg,
            transparent 0px,
            rgba(160,160,184,0.02) 1px,
            transparent 2px,
            transparent 8px
        ),
        var(--bg);
    position: relative;
}
[data-mode="metal"] .tuner-display::before {
    content: '';
    position: absolute; inset: 0;
    background: repeating-linear-gradient(
        0deg,
        transparent 0,
        transparent 3px,
        rgba(128,128,160,0.04) 3px,
        rgba(128,128,160,0.04) 4px
    );
    pointer-events: none;
    z-index: 1;
}
[data-mode="metal"] .note-display {
    font-family: 'Space Mono', monospace;
    letter-spacing: 0.15em;
    text-transform: uppercase;
}
[data-mode="metal"] .string-btn {
    border-radius: 0;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    font-family: 'Space Mono', monospace;
}
[data-mode="metal"] .string-note {
    font-family: 'Space Mono', monospace;
    letter-spacing: 0.15em;
}
[data-mode="metal"] .mic-btn,
[data-mode="metal"] .ref-btn {
    border-radius: 0;
    text-transform: uppercase;
    letter-spacing: 0.12em;
    font-family: 'Space Mono', monospace;
}
[data-mode="metal"] .meter { border-radius: 0; }
[data-mode="metal"] .settings-btn {
    border-radius: 0;
}
[data-mode="metal"] .settings-panel { border-radius: 0; }
[data-mode="metal"] .tuning-status { text-transform: uppercase; letter-spacing: 0.1em; font-family: 'Space Mono', monospace; }
[data-mode="metal"] .frequency,
[data-mode="metal"] .cents { letter-spacing: 0.12em; }

/* --- AGUA: fluid, transparent, dreamy, glass --- */
[data-mode="agua"] {
    --el-radius: 24px;
    --el-font: 'Inknut Antiqua', serif;
    --el-transform: none;
    --el-text-transform: none;
    --el-letter-spacing: 0.02em;
}
[data-mode="agua"] .tuner-display {
    border-radius: 28px;
    background:
        linear-gradient(
            135deg,
            rgba(44,74,124,0.08) 0%,
            transparent 40%,
            rgba(44,74,124,0.05) 70%,
            transparent 100%
        ),
        var(--bg);
    backdrop-filter: blur(1px);
    position: relative;
    overflow: hidden;
}
[data-mode="agua"] .tuner-display::after {
    content: '';
    position: absolute;
    top: -50%; left: -50%;
    width: 200%; height: 200%;
    background: radial-gradient(ellipse at center, rgba(44,74,124,0.06) 0%, transparent 60%);
    animation: agua-drift 8s ease-in-out infinite;
    pointer-events: none;
}
[data-mode="agua"] .note-display {
    font-family: 'Inknut Antiqua', serif;
    position: relative;
    z-index: 2;
    animation: agua-float 3s ease-in-out infinite;
}
[data-mode="agua"] .string-btn {
    border-radius: 20px;
    position: relative;
    overflow: hidden;
    backdrop-filter: blur(2px);
}
[data-mode="agua"] .string-btn::after {
    content: '';
    position: absolute; inset: 0;
    background: linear-gradient(180deg, rgba(255,255,255,0.08) 0%, transparent 50%);
    border-radius: 20px;
    pointer-events: none;
}
[data-mode="agua"] .string-note { font-family: 'Inknut Antiqua', serif; }
[data-mode="agua"] .mic-btn,
[data-mode="agua"] .ref-btn {
    border-radius: 24px;
    font-family: 'Inknut Antiqua', serif;
    backdrop-filter: blur(2px);
}
[data-mode="agua"] .meter { border-radius: 12px; }
[data-mode="agua"] .settings-btn { border-radius: 50%; }
[data-mode="agua"] .settings-panel { border-radius: 24px; }
[data-mode="agua"] .frequency,
[data-mode="agua"] .cents { font-family: 'Inknut Antiqua', serif; }
[data-mode="agua"] .mic-btn.active {
    box-shadow: 0 0 25px var(--accent-glow);
}

/* --- MADERA: warm, handcrafted, rustic --- */
[data-mode="madera"] {
    --el-radius: 4px;
    --el-font: 'Inknut Antiqua', serif;
    --el-transform: none;
    --el-text-transform: none;
    --el-letter-spacing: 0.03em;
}
[data-mode="madera"] .tuner-display {
    border-radius: 4px;
    background:
        repeating-linear-gradient(
            2deg,
            transparent 0px,
            rgba(45,139,111,0.04) 2px,
            transparent 3px,
            transparent 12px
        ),
        repeating-linear-gradient(
            178deg,
            transparent 0px,
            rgba(30,107,80,0.03) 1px,
            transparent 2px,
            transparent 18px
        ),
        var(--bg);
    box-shadow: var(--shadow);
    outline: 2px solid var(--border);
    outline-offset: 4px;
    position: relative;
}
[data-mode="madera"] .note-display {
    font-family: 'Inknut Antiqua', serif;
}
[data-mode="madera"] .string-btn {
    border-radius: 4px;
    font-family: 'Inknut Antiqua', serif;
    transform: rotate(-0.5deg);
}
[data-mode="madera"] .string-btn:nth-child(2) { transform: rotate(0.3deg); }
[data-mode="madera"] .string-btn:nth-child(3) { transform: rotate(-0.4deg); }
[data-mode="madera"] .string-btn:nth-child(4) { transform: rotate(0.6deg); }
[data-mode="madera"] .string-note { font-family: 'Inknut Antiqua', serif; }
[data-mode="madera"] .mic-btn,
[data-mode="madera"] .ref-btn {
    border-radius: 4px;
    font-family: 'Inknut Antiqua', serif;
}
[data-mode="madera"] .meter { border-radius: 2px; }
[data-mode="madera"] .settings-btn {
    border-radius: 4px;
}
[data-mode="madera"] .settings-panel { border-radius: 6px; }
[data-mode="madera"] .frequency,
[data-mode="madera"] .cents { font-family: 'Inknut Antiqua', serif; }
[data-mode="madera"] .tuning-status { font-family: 'Inknut Antiqua', serif; }

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

body {
    font-family: 'Inknut Antiqua', serif;
    background: var(--bg);
    color: var(--text);
    min-height: 100dvh;
    display: flex;
    flex-direction: column;
    transition: background 0.5s ease, color 0.5s ease;
}

main {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 1.5rem;
    gap: 1.5rem;
    max-width: 460px;
    margin: 0 auto;
    width: 100%;
}

/* ============================================
   TUNER DISPLAY
   ============================================ */
.tuner-display {
    width: 100%;
    border: var(--border-w) solid var(--border);
    box-shadow: var(--shadow);
    padding: 2rem 1.5rem;
    text-align: center;
    display: flex;
    flex-direction: column;
    gap: 0.4rem;
    align-items: center;
    border-radius: var(--radius);
    transition: background 0.5s ease, border-color 0.5s ease, box-shadow 0.5s ease, border-radius 0.5s ease;
}

/* 9-slice frames in OSCURO (yang) and CLARO (yin) — playful, textured */
/* Brutal + Minimal stay CLEAN — no frames, just design */

[data-theme="oscuro"] .tuner-display,
[data-theme="claro"] .tuner-display {
    border: 16px solid transparent;
}

/* Oscuro frames (dark, yang, dramatic) */
[data-theme="oscuro"][data-mode="fuego"] .tuner-display  { border-image: url('./frames/fuego.svg') 16 / 16px / 0 stretch; }
[data-theme="oscuro"][data-mode="tierra"] .tuner-display  { border-image: url('./frames/tierra.svg') 16 / 16px / 0 stretch; }
[data-theme="oscuro"][data-mode="metal"] .tuner-display   { border-image: url('./frames/metal.svg') 16 / 16px / 0 stretch; }
[data-theme="oscuro"][data-mode="agua"] .tuner-display    { border-image: url('./frames/agua.svg') 16 / 16px / 0 stretch; }
[data-theme="oscuro"][data-mode="madera"] .tuner-display  { border-image: url('./frames/madera.svg') 16 / 16px / 0 stretch; }

/* Claro frames (light, yin, playful) */
[data-theme="claro"][data-mode="fuego"] .tuner-display   { border-image: url('./frames/fuego-claro.svg') 16 / 16px / 0 stretch; }
[data-theme="claro"][data-mode="tierra"] .tuner-display   { border-image: url('./frames/tierra-claro.svg') 16 / 16px / 0 stretch; }
[data-theme="claro"][data-mode="metal"] .tuner-display    { border-image: url('./frames/metal-claro.svg') 16 / 16px / 0 stretch; }
[data-theme="claro"][data-mode="agua"] .tuner-display     { border-image: url('./frames/agua-claro.svg') 16 / 16px / 0 stretch; }
[data-theme="claro"][data-mode="madera"] .tuner-display   { border-image: url('./frames/madera-claro.svg') 16 / 16px / 0 stretch; }

.note-display {
    font-family: var(--font-head);
    font-size: clamp(3rem, 12vw, 5rem);
    font-weight: 700;
    line-height: 1;
    transition: color 0.3s ease;
}

.frequency { font-family: var(--font-head); font-size: 0.8rem; opacity: 0.5; }

.meter-container { width: 100%; max-width: 280px; margin: 0.75rem 0; }
.meter-labels { display: flex; justify-content: space-between; font-size: 1rem; margin-bottom: 0.3rem; padding: 0 0.25rem; opacity: 0.5; }

.meter {
    width: 100%; height: 20px;
    border: var(--border-w) solid var(--border);
    border-radius: var(--radius);
    background: var(--meter-track);
    position: relative; overflow: hidden;
    transition: background 0.4s ease, border-color 0.4s ease, border-radius 0.4s ease;
}
[data-theme="oscuro"] .meter { height: 12px; border: 1px solid var(--border); opacity: 0.7; }

.meter-bar { width: 100%; height: 100%; position: relative; }
.meter-indicator {
    position: absolute; top: 0; left: 50%;
    width: 4px; height: 100%;
    background: var(--text);
    transform: translateX(-50%);
    transition: left 0.12s ease-out, background 0.3s ease;
}
.meter-indicator.in-tune { background: var(--in-tune); width: 6px; }
.meter-indicator.close { background: #d97706; }
.meter-indicator.out-tune { background: #dc2626; }

.cents { font-family: var(--font-head); font-size: 0.65rem; margin-top: 0.3rem; opacity: 0.4; }
.tuning-status { font-size: 0.65rem; opacity: 0.6; margin-top: 0.3rem; min-height: 1.2em; transition: color 0.3s ease; }
.tuning-status.in-tune { color: var(--in-tune); opacity: 1; font-weight: 700; }

/* ============================================
   STRING BUTTONS
   ============================================ */
.strings-section { width: 100%; }
.strings-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 0.6rem; }

.string-btn {
    border: var(--border-w) solid var(--border);
    border-radius: var(--radius);
    background: var(--bg);
    color: var(--text);
    padding: 0.8rem 0.4rem;
    cursor: pointer;
    display: flex; flex-direction: column; align-items: center; gap: 0.15rem;
    box-shadow: var(--shadow);
    transition: all 0.3s ease;
    position: relative; overflow: hidden;
}
.string-btn::before {
    content: ''; position: absolute; bottom: 0; left: 0; right: 0; height: 3px;
    transition: height 0.3s ease;
}
.string-btn[data-string="4"]::before { background: var(--g-color); }
.string-btn[data-string="3"]::before { background: var(--c-color); }
.string-btn[data-string="2"]::before { background: var(--e-color); }
.string-btn[data-string="1"]::before { background: var(--a-color); }

@media (hover: hover) {
    .string-btn:hover { transform: translate(-1px, -2px); box-shadow: var(--shadow-hover); }
    .string-btn:hover::before { height: 100%; opacity: 0.12; }
}
.string-btn:active { transform: translate(1px, 1px); box-shadow: var(--shadow-active); }
.string-btn.active { transform: translate(1px, 1px); box-shadow: var(--shadow-active); }
.string-btn[data-string="4"].active { background: var(--g-color); color: var(--bg-dark, #1a1a1a); }
.string-btn[data-string="3"].active { background: var(--c-color); color: var(--bg-dark, #1a1a1a); }
.string-btn[data-string="2"].active { background: var(--e-color); color: var(--bg-dark, #1a1a1a); }
.string-btn[data-string="1"].active { background: var(--a-color); color: var(--bg-dark, #1a1a1a); }
/* Agua + Madera dark string colors need light text */
[data-mode="agua"] .string-btn[data-string="3"].active,
[data-mode="agua"] .string-btn[data-string="2"].active { color: #eef2f8; }
[data-mode="metal"] .string-btn[data-string="2"].active { color: #f4f4f8; }

[data-theme="oscuro"] .string-btn, [data-theme="claro"] .string-btn { border: 1px solid var(--border); background: transparent; }
[data-theme="oscuro"] .string-btn.active, [data-theme="claro"] .string-btn.active { color: var(--bg); }

.string-number { font-family: var(--font-head); font-size: 0.6rem; opacity: 0.4; }
.string-note { font-family: var(--font-head); font-size: clamp(1.3rem, 5vw, 1.8rem); font-weight: 700; line-height: 1; }
.string-freq { font-family: var(--font-head); font-size: 0.55rem; opacity: 0.4; }

/* ============================================
   CONTROLS
   ============================================ */
.controls { width: 100%; display: flex; gap: 0.6rem; }
.mic-btn, .ref-btn {
    flex: 1;
    border: var(--border-w) solid var(--border);
    border-radius: var(--radius);
    background: var(--bg); color: var(--text);
    padding: 0.7rem; cursor: pointer;
    font-family: var(--font-head); font-size: 0.65rem; font-weight: 700;
    display: flex; align-items: center; justify-content: center; gap: 0.4rem;
    box-shadow: var(--shadow);
    transition: all 0.3s ease;
    text-transform: lowercase;
}
@media (hover: hover) {
    .mic-btn:hover, .ref-btn:hover { transform: translate(-1px, -2px); box-shadow: var(--shadow-hover); }
}
.mic-btn:active, .ref-btn:active { transform: translate(1px, 1px); box-shadow: var(--shadow-active); }
.mic-btn.active { background: var(--in-tune); color: var(--bg-dark, #1a1a1a); border-color: var(--in-tune); }
[data-mode="agua"] .mic-btn.active,
[data-mode="madera"] .mic-btn.active,
[data-mode="fuego"] .mic-btn.active { color: #fff; }
.mic-icon, .ref-icon { font-size: 1rem; }

[data-theme="oscuro"] .mic-btn, [data-theme="oscuro"] .ref-btn,
[data-theme="claro"] .mic-btn, [data-theme="claro"] .ref-btn { border: 1px solid var(--border); background: transparent; }

/* minimal softer hover */
@media (hover: hover) {
    [data-theme="minimal"] .string-btn:hover,
    [data-theme="minimal"] .mic-btn:hover,
    [data-theme="minimal"] .ref-btn:hover,
    [data-theme="minimal"] .settings-btn:hover { transform: translateY(-2px); }
}

/* ============================================
   SETTINGS BUTTON (inline in controls)
   ============================================ */
.settings-btn {
    flex: 0 0 auto;
    width: 42px; height: auto;
    border: var(--border-w) solid var(--border);
    border-radius: var(--radius);
    background: var(--bg); color: var(--text);
    cursor: pointer; display: grid; place-items: center;
    box-shadow: var(--shadow);
    transition: background 0.3s ease, border-color 0.3s ease, box-shadow 0.3s ease;
}
@media (hover: hover) {
    .settings-btn:hover { transform: translate(-1px, -2px); box-shadow: var(--shadow-hover); }
    .settings-btn:hover svg { transform: rotate(45deg); }
}
.settings-btn:active { transform: translate(1px, 1px); box-shadow: var(--shadow-active); }
.settings-btn.active { background: var(--accent); color: var(--bg); border-color: var(--accent); }
.settings-btn.active svg { stroke: var(--bg); }
.settings-btn svg { transition: transform 0.4s ease; }

[data-theme="oscuro"] .settings-btn, [data-theme="claro"] .settings-btn { border: 1px solid var(--border); background: transparent; }
[data-theme="oscuro"] .settings-btn.active, [data-theme="claro"] .settings-btn.active { background: var(--accent); border-color: var(--accent); }
[data-theme="oscuro"] .settings-panel, [data-theme="claro"] .settings-panel { border: 1px solid var(--border); }

/* ============================================
   SETTINGS PANEL (overlay: right on desktop, bottom on mobile)
   ============================================ */
.settings-panel {
    position: fixed;
    z-index: 50;
    background: var(--bg);
    border: var(--border-w) solid var(--border);
    box-shadow: var(--shadow);
    padding: 1.2rem;
    transition: transform 0.35s ease, opacity 0.35s ease;
    opacity: 0;
    pointer-events: none;
    overflow-y: auto;
    /* Desktop: slide from right */
    top: 0; right: 0; bottom: 0;
    width: 260px;
    border-radius: 0;
    transform: translateX(100%);
}
.settings-panel.open {
    opacity: 1;
    pointer-events: auto;
    transform: translateX(0);
}
/* Mobile: slide from bottom */
@media (max-width: 500px) {
    .settings-panel {
        top: auto; left: 0; right: 0; bottom: 0;
        width: 100%;
        max-height: 60vh;
        transform: translateY(100%);
        border-radius: var(--radius) var(--radius) 0 0;
        border-bottom: none;
    }
    .settings-panel.open {
        transform: translateY(0);
    }
}
.settings-panel-inner {
    display: flex;
    flex-direction: column;
    gap: 0.2rem;
}
.settings-section-title {
    font-family: var(--font-head); font-size: 0.65rem; font-weight: 700;
    text-transform: lowercase; letter-spacing: 0.1em;
    display: block; margin-bottom: 0.5rem;
}
.settings-divider { height: 1px; background: var(--border); opacity: 0.3; margin: 0.75rem 0; }
/* Backdrop */
.settings-backdrop {
    position: fixed; inset: 0;
    background: rgba(0,0,0,0.3);
    z-index: 49;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.35s ease;
}
.settings-backdrop.open {
    opacity: 1;
    pointer-events: auto;
}

.modes-grid { display: grid; grid-template-columns: repeat(5, 1fr); gap: 0.4rem; }
.themes-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 0.4rem; }

.mode-btn, .theme-btn {
    border: 1px solid transparent; border-radius: 6px;
    background: transparent; color: var(--text);
    padding: 0.4rem 0.2rem; cursor: pointer;
    display: flex; flex-direction: column; align-items: center; gap: 0.25rem;
    transition: transform 0.15s ease;
}
@media (hover: hover) { .mode-btn:hover, .theme-btn:hover { transform: translateY(-2px); } }
.mode-btn.active, .theme-btn.active { border-color: var(--text); background: rgba(128,128,128,0.08); }

.mode-swatch, .theme-swatch { width: 28px; height: 28px; border-radius: 4px; display: block; }
.mode-swatch-fuego  { background: linear-gradient(135deg, #1a0604, #3a0c08); border: 1px solid #c83c23; }
.mode-swatch-tierra { background: linear-gradient(135deg, #14100a, #2a1e0c); border: 1px solid #d4a017; }
.mode-swatch-metal  { background: linear-gradient(135deg, #08080c, #1a1a22); border: 1px solid #b8b8c8; }
.mode-swatch-agua   { background: linear-gradient(135deg, #06080e, #0c1628); border: 1px solid #2c4a7c; }
.mode-swatch-madera { background: linear-gradient(135deg, #060e0b, #0c1a14); border: 1px solid #2d8b6f; }

.theme-swatch-brutal  { background: #fffce8; border: 3px solid #1a1a1a; }
.theme-swatch-minimal { background: #fff; border: 1px solid #ccc; border-radius: 8px; }
.theme-swatch-claro   { background: linear-gradient(135deg, #fef3e2, #eaf8f9); border: 1px solid #aaa; }
.theme-swatch-oscuro  { background: linear-gradient(135deg, #0a0a0e, #0c0816); border: 1px solid #555; }

.mode-name, .theme-name { font-family: 'Space Mono', monospace; font-size: 0.45rem; text-transform: lowercase; letter-spacing: 0.05em; }

.site-brand { text-align: center; padding: 1rem 0 1.2rem; }
.site-brand a { font-family: 'Inknut Antiqua', serif; font-size: 0.5rem; color: var(--text); text-decoration: none; opacity: 0.3; letter-spacing: 0.1em; transition: opacity 0.2s; }
.site-brand a:hover { opacity: 0.7; }

/* ============================================
   ANIMATIONS
   ============================================ */
@keyframes fade-in { from { opacity: 0; transform: translateY(8px); } to { opacity: 1; transform: translateY(0); } }
.tuner-display { animation: fade-in 0.4s ease-out; }
.string-btn { animation: fade-in 0.4s ease-out backwards; }
.string-btn:nth-child(1) { animation-delay: 0.05s; }
.string-btn:nth-child(2) { animation-delay: 0.1s; }
.string-btn:nth-child(3) { animation-delay: 0.15s; }
.string-btn:nth-child(4) { animation-delay: 0.2s; }
.controls button { animation: fade-in 0.4s ease-out 0.25s backwards; }

@keyframes pulse-tune { 0%, 100% { transform: scale(1); } 50% { transform: scale(1.01); } }
.tuner-display.in-tune { animation: pulse-tune 1s ease-in-out infinite; }

/* Element-specific animations */
@keyframes fuego-flicker {
    0%, 100% { text-shadow: 0 0 30px var(--accent-glow), 0 0 60px var(--accent-glow); opacity: 1; }
    25% { text-shadow: 0 0 40px var(--accent-glow), 0 0 80px var(--accent-glow); opacity: 0.95; }
    50% { text-shadow: 0 0 20px var(--accent-glow), 0 0 50px var(--accent-glow); opacity: 1; }
    75% { text-shadow: 0 0 35px var(--accent-glow), 0 0 70px var(--accent-glow); opacity: 0.97; }
}
@keyframes fuego-pulse {
    0%, 100% { box-shadow: 0 0 20px var(--accent-glow), 0 0 40px var(--accent-glow); }
    50% { box-shadow: 0 0 30px var(--accent-glow), 0 0 60px var(--accent-glow); }
}
@keyframes tierra-breathe {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.008); }
}
@keyframes agua-drift {
    0%, 100% { transform: translate(0, 0) rotate(0deg); }
    33% { transform: translate(3%, 2%) rotate(1deg); }
    66% { transform: translate(-2%, -1%) rotate(-0.5deg); }
}
@keyframes agua-float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-3px); }
}

[data-theme="brutal"] .tuner-display.in-tune { border-color: var(--in-tune); box-shadow: 5px 5px 0 var(--in-tune); }
[data-theme="minimal"] .tuner-display.in-tune { border-color: var(--in-tune); box-shadow: 0 4px 20px rgba(0,0,0,0.08); }
[data-theme="claro"] .tuner-display.in-tune { border-color: var(--in-tune); box-shadow: 0 4px 20px var(--accent-glow); }
[data-theme="oscuro"] .tuner-display.in-tune { box-shadow: 0 0 30px var(--accent-glow); }

/* ============================================
   RESPONSIVE
   ============================================ */
@media (max-width: 400px) {
    main { padding: 1rem; gap: 1rem; }
    .tuner-display { padding: 1.5rem 1rem; }
    .strings-grid { gap: 0.4rem; }
    .string-btn { padding: 0.6rem 0.25rem; }
    .controls { gap: 0.4rem; }
}