/* ============================================
   Theme Variables
   ============================================ */
:root,
:root[data-theme="dark"] {
    /* Red Radio Palette */
    --case-color: #d32f2f;
    --case-shadow: #b71c1c;
    --front-panel: #e0e0e0;
    --speaker-mesh: #212121;
    --highlight: #fff;
    --text-color: #212121;
    --indicator-off: #424242;
    --indicator-on: #ffeb3b;
    --knob-color: #d7ccc8;
    --gold-accent: #ffb300;
    --bg-primary: #263238;
    --bg-secondary: #37474f;
    --overlay-opacity: 0.4;
    --menu-bg: rgba(38, 50, 56, 0.98);
    --menu-text: #fff;
    --button-bg: rgba(255, 255, 255, 0.1);
    --button-border: rgba(255, 255, 255, 0.2);
}

:root[data-theme="light"] {
    --case-color: #ef5350;
    --case-shadow: #e53935;
    --front-panel: #fafafa;
    --speaker-mesh: #424242;
    --bg-primary: #eceff1;
    --bg-secondary: #cfd8dc;
    --overlay-opacity: 0.2;
    --menu-bg: rgba(255, 255, 255, 0.98);
    --menu-text: #212121;
    --button-bg: rgba(0, 0, 0, 0.1);
    --button-border: rgba(0, 0, 0, 0.2);
}

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

body {
    font-family: 'Share Tech Mono', monospace;
    background-color: var(--bg-primary);
    background-image:
        radial-gradient(circle at 50% 50%, rgba(0, 0, 0, 0) 0%, rgba(0, 0, 0, 0.3) 100%),
        url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23000000' fill-opacity='0.15'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    overflow: hidden;
    color: var(--text-color);
    opacity: 0;
    animation: fadeIn 0.8s ease-out forwards;
    transition: background-color 0.3s ease;
}

@keyframes fadeIn {
    to {
        opacity: 1;
    }
}

#particles {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 5;
    pointer-events: none;
}

.vintage-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: url('https://www.transparenttextures.com/patterns/dust.png');
    opacity: var(--overlay-opacity);
    pointer-events: none;
    z-index: 10;
    mix-blend-mode: overlay;
    transition: opacity 0.3s ease;
}
html, body {
    /* Evita que el usuario pueda arrastrar la pantalla hacia abajo y ver fondo vacío */
    overscroll-behavior-y: contain;
    /* Evita que se seleccionen textos por error al tocar botones */
    user-select: none;
    -webkit-tap-highlight-color: transparent;
}

header {
    position: absolute;
    top: 20px;
    width: 90%;
    display: flex;
    justify-content: space-between;
    align-items: center;
    z-index: 20;
    gap: 15px;
}

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

.logo-container {
    display: flex;
    align-items: center;
    gap: 15px;
    animation: fadeInDown 1s ease-out;
    background: transparent;
    padding: 10px;
    border-radius: 15px;
}

@keyframes fadeInDown {
    from {
        opacity: 0;
        transform: translateY(-30px);
    }

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

.logo-image {
    height: 70px;
    width: auto;
    filter: drop-shadow(0 4px 12px rgba(0, 0, 0, 0.5));
    transition: all 0.3s ease;
    background: transparent !important;
    animation: logoFloat 4s ease-in-out infinite;
    display: block;
    mix-blend-mode: screen;
}

@keyframes logoFloat {

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

    50% {
        transform: translateY(-10px) rotate(1deg);
    }
}

.logo-image:hover {
    filter: drop-shadow(3px 3px 12px rgba(239, 83, 80, 0.8));
    transform: scale(1.1) !important;
    animation-play-state: paused;
}

/* En modo claro el fondo del logo es negro: usar multiply sobre fondo claro */
:root[data-theme="light"] .logo-image {
    mix-blend-mode: multiply;
}

#menu-btn,
#theme-toggle,
#settings-btn,
#share-btn {
    background: var(--button-bg);
    border: 2px solid var(--button-border);
    border-radius: 50%;
    width: 50px;
    height: 50px;
    font-size: 1.5rem;
    color: #fff;
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    backdrop-filter: blur(10px);
}

#menu-btn:hover,
#theme-toggle:hover,
#settings-btn:hover,
#share-btn:hover {
    background: #ef5350;
    transform: scale(1.1);
    border-color: #ef5350;
    box-shadow: 0 0 20px rgba(239, 83, 80, 0.6);
}

#theme-toggle:hover {
    transform: scale(1.1) rotate(180deg);
}

#menu-btn:hover,
#settings-btn:hover {
    transform: scale(1.1) rotate(90deg);
}

.radio-case {
    width: 800px;
    max-width: 95vw;
    height: 480px;
    background: var(--case-color);
    border-radius: 30px;
    padding: 25px;
    box-shadow:
        inset 0 0 40px rgba(0, 0, 0, 0.4),
        0 30px 60px rgba(0, 0, 0, 0.6),
        0 10px 20px rgba(0, 0, 0, 0.4),
        0 0 0 10px var(--case-shadow);
    display: flex;
    position: relative;
    border: 4px solid rgba(255, 255, 255, 0.1);
    animation: float 6s ease-in-out infinite;
}

@keyframes float {

    0%,
    100% {
        transform: translateY(0) rotate(0deg);
    }

    25% {
        transform: translateY(-8px) rotate(-1deg);
    }

    50% {
        transform: translateY(-10px) rotate(0deg);
    }

    75% {
        transform: translateY(-8px) rotate(1deg);
    }
}

.radio-case::after {
    content: '';
    position: absolute;
    top: 5px;
    right: 5px;
    bottom: 5px;
    left: 5px;
    border-radius: 25px;
    box-shadow: inset 0 0 20px rgba(0, 0, 0, 0.2);
    pointer-events: none;
    z-index: 5;
}

.handle {
    position: absolute;
    top: -50px;
    left: 50%;
    transform: translateX(-50%);
    width: 300px;
    height: 60px;
    background: linear-gradient(to bottom, #cfd8dc, #90a4ae);
    border-radius: 30px 30px 0 0;
    z-index: 10;
    box-shadow:
        inset 0 5px 5px rgba(255, 255, 255, 0.8),
        inset 0 -5px 10px rgba(0, 0, 0, 0.3),
        0 5px 10px rgba(0, 0, 0, 0.5);
    border: 2px solid #78909c;
}

.speaker-grill {
    flex: 1;
    background: var(--front-panel);
    border-radius: 15px;
    margin-right: 25px;
    position: relative;
    overflow: hidden;
    box-shadow:
        inset 2px 2px 5px rgba(255, 255, 255, 0.8),
        inset -2px -2px 5px rgba(0, 0, 0, 0.2);
    display: flex;
    justify-content: center;
    align-items: center;
    border: 1px solid #bdbdbd;
}

.mesh {
    width: 88%;
    height: 88%;
    background-color: var(--speaker-mesh);
    background-image:
        linear-gradient(45deg, #333 25%, transparent 25%, transparent 75%, #333 75%, #333),
        linear-gradient(45deg, #333 25%, transparent 25%, transparent 75%, #333 75%, #333);
    background-size: 10px 10px;
    background-position: 0 0, 5px 5px;
    border-radius: 10px;
    box-shadow: inset 0 0 30px #000;
    border: 2px solid #424242;
    transition: transform 0.1s ease-out;
}

.mesh.vibrating {
    animation: vibrate 0.1s infinite;
}

@keyframes vibrate {

    0%,
    100% {
        transform: translate(0, 0);
    }

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

    50% {
        transform: translate(1px, -1px);
    }

    75% {
        transform: translate(-1px, -1px);
    }
}

.logo-badge {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    background: linear-gradient(135deg, #fff, #e0e0e0, #bdbdbd);
    padding: 8px 15px;
    border-radius: 4px;
    font-family: 'Special Elite', cursive;
    font-size: 1rem;
    color: var(--case-shadow);
    box-shadow:
        1px 1px 0px #fff,
        2px 2px 4px rgba(0, 0, 0, 0.4),
        inset 0 1px 0 rgba(255, 255, 255, 0.8);
    border: 1px solid #78909c;
    z-index: 11;
    font-weight: bold;
    letter-spacing: 1px;
    text-shadow: 1px 1px 0px rgba(255, 255, 255, 0.5);
    transition: all 0.3s ease;
    white-space: nowrap;
}

.logo-badge:hover {
    transform: translate(-50%, -50%) scale(1.05);
    background: linear-gradient(135deg, #fff, #fff, #e0e0e0);
}

.control-panel {
    width: 320px;
    background: linear-gradient(135deg, #f5f5f5, #e0e0e0);
    border-radius: 15px;
    padding: 20px;
    display: flex;
    flex-direction: column;
    gap: 25px;
    box-shadow:
        inset 2px 2px 5px rgba(255, 255, 255, 0.8),
        inset -2px -2px 5px rgba(0, 0, 0, 0.2),
        0 5px 15px rgba(0, 0, 0, 0.3);
    border: 1px solid #bdbdbd;
    position: relative;
}

.control-panel::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 50%;
    background: linear-gradient(to bottom, rgba(255, 255, 255, 0.1), transparent);
    border-radius: 15px 15px 0 0;
    pointer-events: none;
}

.visualizer-display {
    height: 120px;
    background: linear-gradient(135deg, #1a1a1a 0%, #0a0a0a 100%);
    border-radius: 8px;
    position: relative;
    box-shadow:
        inset 0 0 20px rgba(0, 255, 100, 0.1),
        inset 0 4px 8px rgba(0, 0, 0, 0.8);
    border: 4px solid #2a2a2a;
    overflow: hidden;
}

#visualizer {
    width: 100%;
    height: 100%;
    display: block;
}

.visualizer-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 2;
}

.visualizer-overlay::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 50%;
    background: linear-gradient(to bottom, rgba(255, 255, 255, 0.05), transparent);
    z-index: 1;
}

.frequency-label {
    font-family: 'Special Elite', cursive;
    font-size: 2rem;
    color: #00ff88;
    text-shadow:
        0 0 10px #00ff88,
        0 0 20px #00ff88,
        0 0 30px #00ff88;
    opacity: 0;
    transition: opacity 0.5s ease;
    z-index: 2;
    letter-spacing: 3px;
    font-weight: bold;
    animation: glow-pulse 2s ease-in-out infinite;
}

@keyframes glow-pulse {

    0%,
    100% {
        text-shadow:
            0 0 10px #00ff88,
            0 0 20px #00ff88,
            0 0 30px #00ff88;
    }

    50% {
        text-shadow:
            0 0 15px #00ff88,
            0 0 30px #00ff88,
            0 0 45px #00ff88,
            0 0 60px rgba(0, 255, 136, 0.5);
    }
}

.visualizer-display.active .frequency-label {
    opacity: 0.9;
}

.on-light {
    position: absolute;
    top: 15px;
    right: 15px;
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: #263238;
    box-shadow: inset 0 1px 3px rgba(0, 0, 0, 1);
    transition: all 0.3s;
    z-index: 3;
    border: 1px solid #455a64;
}

.on-light.active {
    background: var(--indicator-on);
    box-shadow:
        0 0 15px var(--indicator-on),
        0 0 30px var(--indicator-on),
        inset 0 0 5px #fff;
    animation: flicker 4s infinite;
}

@keyframes flicker {

    0%,
    100% {
        opacity: 1;
    }

    50% {
        opacity: 0.95;
    }

    52% {
        opacity: 0.8;
    }

    54% {
        opacity: 0.95;
    }
}

.knobs {
    display: flex;
    gap: 30px;
    justify-content: space-around;
    align-items: flex-end;
    margin-top: auto;
}

.knob-group {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
}

.knob-group label,
.switch-group label {
    font-size: 0.75rem;
    font-weight: bold;
    color: #5d4037;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.knob {
    width: 70px;
    height: 70px;
    background: conic-gradient(#eeeeee 0deg, #bdbdbd 90deg, #eeeeee 180deg, #bdbdbd 270deg, #eeeeee 360deg);
    border-radius: 50%;
    position: relative;
    box-shadow:
        0 5px 15px rgba(0, 0, 0, 0.3),
        0 0 0 1px #9e9e9e,
        inset 0 2px 5px rgba(255, 255, 255, 0.3);
    cursor: grab;
    transition: all 0.1s ease-out;
}

.knob:hover {
    box-shadow:
        0 7px 20px rgba(0, 0, 0, 0.4),
        0 0 0 1px #9e9e9e,
        inset 0 2px 5px rgba(255, 255, 255, 0.3),
        0 0 15px rgba(211, 47, 47, 0.3);
}

.knob:active {
    cursor: grabbing;
    transform: scale(0.98);
}

.knob .marker {
    position: absolute;
    top: 5px;
    left: 50%;
    transform: translateX(-50%);
    width: 6px;
    height: 12px;
    background: var(--case-color);
    border-radius: 2px;
    box-shadow:
        inset 0 1px 2px rgba(0, 0, 0, 0.3),
        0 1px 2px rgba(255, 255, 255, 0.5);
}

.knob .knob-center {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 30px;
    height: 30px;
    background: radial-gradient(circle, #fff, #e0e0e0);
    border-radius: 50%;
    box-shadow:
        inset 0 2px 4px rgba(0, 0, 0, 0.2),
        0 1px 2px rgba(255, 255, 255, 0.8);
}

.knob .knob-center::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 15px;
    height: 15px;
    background: #bdbdbd;
    border-radius: 50%;
    box-shadow: inset 0 1px 2px rgba(0, 0, 0, 0.3);
}

.volume-indicator {
    width: 60px;
    height: 6px;
    background: #424242;
    border-radius: 3px;
    margin-top: 5px;
    overflow: hidden;
    box-shadow: inset 0 1px 3px rgba(0, 0, 0, 0.5);
}

.volume-bar {
    height: 100%;
    width: 100%;
    background: linear-gradient(90deg, #4caf50, #8bc34a, #cddc39, #ffc107);
    border-radius: 3px;
    transition: width 0.1s linear, background 0.2s;
    box-shadow: 0 0 8px rgba(76, 175, 80, 0.8);
}

.switch-group {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
}

.toggle-switch {
    width: 70px;
    height: 35px;
    background: #9e9e9e;
    border-radius: 18px;
    position: relative;
    cursor: pointer;
    box-shadow:
        inset 0 3px 6px rgba(0, 0, 0, 0.4),
        0 2px 4px rgba(255, 255, 255, 0.2);
    transition: all 0.3s;
}

.toggle-switch:hover {
    box-shadow:
        inset 0 3px 6px rgba(0, 0, 0, 0.4),
        0 2px 4px rgba(255, 255, 255, 0.2),
        0 0 15px rgba(211, 47, 47, 0.3);
}

.toggle-switch.active {
    background: #4caf50;
    box-shadow:
        inset 0 3px 6px rgba(0, 0, 0, 0.3),
        0 0 15px rgba(76, 175, 80, 0.6);
}

.switch-lever {
    position: absolute;
    top: 4px;
    left: 4px;
    width: 27px;
    height: 27px;
    background: linear-gradient(135deg, #fff, #e0e0e0);
    border-radius: 50%;
    transition: all 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    box-shadow: 0 3px 6px rgba(0, 0, 0, 0.3);
}

.toggle-switch.active .switch-lever {
    left: 39px;
}

.marquee-container {
    position: fixed;
    bottom: 0;
    left: 0;
    width: 100%;
    background: linear-gradient(90deg, #d32f2f, #b71c1c, #d32f2f);
    padding: 15px 0;
    overflow: hidden;
    z-index: 15;
    box-shadow: 0 -5px 20px rgba(0, 0, 0, 0.5);
}

.marquee-content {
    display: flex;
    white-space: nowrap;
    animation: marquee 30s linear infinite;
}

@keyframes marquee {
    0% {
        transform: translateX(0);
    }

    100% {
        transform: translateX(-33.33%);
    }
}

.marquee-content a {
    color: #fff;
    text-decoration: none;
    font-weight: bold;
    font-size: 1.2rem;
    padding: 0 50px;
    transition: all 0.3s;
}

.marquee-content a:hover {
    color: #ffeb3b;
    text-shadow: 0 0 10px #ffeb3b;
}

#menu-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--menu-bg);
    backdrop-filter: blur(20px);
    z-index: 1000;
    display: flex;
    justify-content: center;
    align-items: center;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

#menu-overlay.visible {
    opacity: 1;
    visibility: visible;
}

#menu-overlay ul {
    list-style: none;
    text-align: center;
}

#menu-overlay li {
    margin: 25px 0;
    transform: translateY(30px);
    opacity: 0;
    transition: all 0.3s ease;
}

#menu-overlay.visible li {
    transform: translateY(0);
    opacity: 1;
}

#menu-overlay.visible li:nth-child(1) {
    transition-delay: 0.1s;
}

#menu-overlay.visible li:nth-child(2) {
    transition-delay: 0.15s;
}

#menu-overlay.visible li:nth-child(3) {
    transition-delay: 0.2s;
}

#menu-overlay.visible li:nth-child(4) {
    transition-delay: 0.25s;
}

#menu-overlay.visible li:nth-child(5) {
    transition-delay: 0.3s;
}

#menu-overlay a {
    color: var(--menu-text);
    text-decoration: none;
    font-size: 2rem;
    font-weight: bold;
    transition: all 0.3s;
    display: inline-block;
    padding: 10px 20px;
    border-radius: 10px;
}

#menu-overlay a:hover {
    color: #ef5350;
    transform: scale(1.1);
    text-shadow: 0 0 20px #ef5350;
}

#close-menu {
    position: absolute;
    top: 30px;
    right: 30px;
    background: var(--button-bg);
    border: 2px solid var(--button-border);
    border-radius: 50%;
    width: 60px;
    height: 60px;
    font-size: 2rem;
    color: var(--menu-text);
    cursor: pointer;
    transition: all 0.3s;
}

#close-menu:hover {
    background: #ef5350;
    border-color: #ef5350;
    transform: scale(1.1) rotate(90deg);
    box-shadow: 0 0 30px rgba(239, 83, 80, 0.6);
}

.social-links {
    display: flex;
    justify-content: center;
    gap: 30px;
    margin-top: 30px;
}

.social-links a {
    font-size: 2.5rem;
    padding: 15px;
}

#settings-panel {
    position: fixed;
    top: 0;
    right: -400px;
    width: 400px;
    max-width: 90vw;
    height: 100%;
    background: var(--menu-bg);
    backdrop-filter: blur(20px);
    z-index: 1001;
    padding: 30px;
    overflow-y: auto;
    box-shadow: -5px 0 30px rgba(0, 0, 0, 0.5);
    transition: right 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

#settings-panel.visible {
    right: 0;
}

#settings-panel h2 {
    color: var(--menu-text);
    font-size: 2rem;
    margin-bottom: 30px;
    font-family: 'Special Elite', cursive;
}

#close-settings {
    position: absolute;
    top: 20px;
    right: 20px;
    background: transparent;
    border: none;
    font-size: 2rem;
    color: var(--menu-text);
    cursor: pointer;
    transition: all 0.3s;
}

#close-settings:hover {
    color: #ef5350;
    transform: scale(1.2) rotate(90deg);
}

.settings-group {
    margin-bottom: 30px;
}

.settings-group label {
    display: block;
    color: var(--menu-text);
    font-size: 1rem;
    margin-bottom: 10px;
    font-weight: bold;
}

.settings-group select {
    width: 100%;
    padding: 12px;
    border-radius: 8px;
    border: 2px solid var(--button-border);
    background: var(--button-bg);
    color: var(--menu-text);
    font-size: 1rem;
    cursor: pointer;
    transition: all 0.3s;
}

.settings-group select:hover,
.settings-group select:focus {
    border-color: #ef5350;
    box-shadow: 0 0 10px rgba(239, 83, 80, 0.3);
}

.checkbox-wrapper {
    display: flex;
    align-items: center;
    gap: 15px;
}

.checkbox-wrapper span {
    color: var(--menu-text);
}

.checkbox-wrapper input[type="checkbox"] {
    width: 50px;
    height: 26px;
    appearance: none;
    background: #424242;
    border-radius: 13px;
    position: relative;
    cursor: pointer;
    transition: all 0.3s;
}

.checkbox-wrapper input[type="checkbox"]:checked {
    background: #4caf50;
}

.checkbox-wrapper input[type="checkbox"]::before {
    content: '';
    position: absolute;
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: #fff;
    top: 3px;
    left: 3px;
    transition: all 0.3s;
}

.checkbox-wrapper input[type="checkbox"]:checked::before {
    left: 27px;
}

.whatsapp-float {
    position: fixed;
    bottom: 80px;
    right: 30px;
    background: #25d366;
    width: 60px;
    height: 60px;
    border-radius: 50%;
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 2rem;
    color: #fff;
    box-shadow: 0 5px 20px rgba(37, 211, 102, 0.5);
    z-index: 100;
    transition: all 0.3s;
    animation: pulse 2s infinite;
    text-decoration: none;
}

@keyframes pulse {

    0%,
    100% {
        transform: scale(1);
        box-shadow: 0 5px 20px rgba(37, 211, 102, 0.5);
    }

    50% {
        transform: scale(1.05);
        box-shadow: 0 5px 30px rgba(37, 211, 102, 0.8);
    }
}

.whatsapp-float:hover {
    transform: scale(1.1);
    box-shadow: 0 8px 30px rgba(37, 211, 102, 0.8);
}

.hidden {
    display: none;
}

@media (max-width: 768px) {
    .radio-case {
        width: 85vw;
        max-width: 320px;
        height: auto;
        min-height: 320px;
        flex-direction: column;
        padding: 12px;
        margin: 20px auto;
        transform: scale(0.9);
    }

    .speaker-grill {
        margin-right: 0;
        margin-bottom: 15px;
        min-height: 200px;
        background: var(--front-panel);
        display: flex;
        justify-content: center;
        align-items: center;
        border-radius: 15px;
        padding: 10px;
    }

    .mesh {
        width: 170px;
        height: 170px;
        max-width: 70vw;
        max-height: 70vw;
        background-color: #111;
        background-image:
            radial-gradient(circle at center, #222 0%, #111 40%, #000 100%),
            repeating-radial-gradient(circle at center, #222 0, #222 2px, transparent 2px, transparent 4px);
        border-radius: 50%;
        border: 8px solid #333;
        box-shadow:
            inset 0 0 30px #000,
            0 8px 15px rgba(0, 0, 0, 0.4),
            0 0 0 3px #222;
        position: relative;
        display: flex;
        justify-content: center;
        align-items: center;
    }

    .mesh::after {
        content: '';
        position: absolute;
        width: 35%;
        height: 35%;
        background: radial-gradient(circle at 30% 30%, #444 0%, #111 100%);
        border-radius: 50%;
        box-shadow: 2px 2px 8px rgba(0, 0, 0, 0.8);
        border: 1px solid #222;
    }



    .control-panel {
        width: 100%;
        padding: 10px;
        gap: 10px;
    }

    .handle {
        width: 160px;
        height: 40px;
        top: -30px;
    }

    .logo-badge {
        font-size: 0.8rem;
        padding: 4px 10px;
    }

    .logo-image {
        height: 65px;
    }

    header {
        top: 10px;
        padding: 0 5px;
    }

    #menu-btn,
    #theme-toggle,
    #settings-btn,
    #share-btn {
        width: 40px;
        height: 40px;
        font-size: 1.2rem;
    }

    #menu-overlay a {
        font-size: 1.5rem;
    }

    .frequency-label {
        font-size: 1.5rem;
    }

    .whatsapp-float {
        width: 50px;
        height: 50px;
        font-size: 1.5rem;
        bottom: 100px;
        right: 20px;
    }

    #settings-panel {
        width: 100vw;
        right: -100vw;
    }

    body {
        overflow-y: hidden;
        justify-content: center;
        padding-top: 0;
        padding-bottom: 0;
    }

    #radio-container {
        padding: 0;
        display: flex;
        justify-content: center;
        align-items: center;
        width: 100%;
        height: 100vh;
    }
}

@media (max-width: 480px) {
    .knobs {
        gap: 15px;
    }

    .knob {
        width: 60px;
        height: 60px;
    }

    .toggle-switch {
        width: 60px;
        height: 30px;
    }

    .switch-lever {
        width: 24px;
        height: 24px;
    }

    .toggle-switch.active .switch-lever {
        left: 32px;
    }
}

/* ============================================
   Connection Quality Indicator
   ============================================ */
.connection-indicator {
    position: fixed;
    top: 100px;
    right: 20px;
    background: rgba(0, 0, 0, 0.8);
    backdrop-filter: blur(10px);
    border-radius: 15px;
    padding: 15px 20px;
    z-index: 100;
    display: flex;
    align-items: center;
    gap: 10px;
    transition: all 0.3s ease;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.3);
    opacity: 0;
    transform: translateX(150px);
}

.connection-indicator.visible {
    opacity: 1;
    transform: translateX(0);
}

.connection-dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: #4caf50;
    box-shadow: 0 0 10px currentColor;
    animation: pulse-dot 2s infinite;
}

.connection-dot.excellent {
    background: #4caf50;
    box-shadow: 0 0 15px #4caf50;
}

.connection-dot.good {
    background: #8bc34a;
    box-shadow: 0 0 15px #8bc34a;
}

.connection-dot.fair {
    background: #ffc107;
    box-shadow: 0 0 15px #ffc107;
}

.connection-dot.poor {
    background: #ff9800;
    box-shadow: 0 0 15px #ff9800;
}

.connection-dot.offline {
    background: #f44336;
    box-shadow: 0 0 15px #f44336;
    animation: pulse-alert 1s infinite;
}

@keyframes pulse-dot {

    0%,
    100% {
        transform: scale(1);
        opacity: 1;
    }

    50% {
        transform: scale(1.2);
        opacity: 0.8;
    }
}

@keyframes pulse-alert {

    0%,
    100% {
        transform: scale(1);
    }

    50% {
        transform: scale(1.3);
    }
}

.connection-text {
    color: #fff;
    font-size: 0.9rem;
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.connection-status {
    font-weight: bold;
}

.connection-stats {
    font-size: 0.75rem;
    opacity: 0.7;
}

.buffer-indicator {
    width: 100px;
    height: 4px;
    background: rgba(255, 255, 255, 0.2);
    border-radius: 2px;
    overflow: hidden;
    margin-top: 5px;
}

.buffer-fill {
    height: 100%;
    background: linear-gradient(90deg, #4caf50, #8bc34a);
    transition: width 0.3s ease;
    width: 0%;
}

@media (max-width: 768px) {
    .connection-indicator {
        top: 80px;
        right: 10px;
        padding: 10px 15px;
        font-size: 0.85rem;
    }

    .connection-dot {
        width: 10px;
        height: 10px;
    }

    .buffer-indicator {
        width: 80px;
    }
}

/*
/* ============================================
   Chat en Vivo (Preparado)
   ============================================ * /
.chat-container {
    position: fixed;
    bottom: 80px;
    right: 20px;
    width: 350px;
    height: 500px;
    background: var(--menu-bg);
    backdrop-filter: blur(20px);
    border-radius: 20px;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.5);
    z-index: 200;
    display: flex;
    flex-direction: column;
    transform: translateY(600px);
    transition: transform 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    overflow: hidden;
}

.chat-container.visible {
    transform: translateY(0);
}

.chat-header {
    background: linear-gradient(135deg, #d32f2f, #b71c1c);
    padding: 15px 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-radius: 20px 20px 0 0;
}

.chat-title {
    color: #fff;
    font-weight: bold;
    font-size: 1rem;
    display: flex;
    align-items: center;
    gap: 8px;
}

.chat-online {
    display: flex;
    align-items: center;
    gap: 5px;
    font-size: 0.8rem;
    color: rgba(255, 255, 255, 0.9);
}

.chat-online-dot {
    width: 8px;
    height: 8px;
    background: #4caf50;
    border-radius: 50%;
    animation: pulse-dot 2s infinite;
}

.chat-close-btn {
    background: transparent;
    border: none;
    color: #fff;
    font-size: 1.5rem;
    cursor: pointer;
    transition: transform 0.2s;
}

.chat-close-btn:hover {
    transform: rotate(90deg);
}

.chat-messages {
    flex: 1;
    padding: 20px;
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.chat-message {
    display: flex;
    flex-direction: column;
    gap: 5px;
    animation: slideInMessage 0.3s ease;
}

@keyframes slideInMessage {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.chat-message.own {
    align-items: flex-end;
}

.chat-message.other {
    align-items: flex-start;
}

.chat-message-author {
    font-size: 0.75rem;
    opacity: 0.7;
    color: var(--menu-text);
}

.chat-message-bubble {
    max-width: 80%;
    padding: 10px 15px;
    border-radius: 15px;
    word-wrap: break-word;
}

.chat-message.own .chat-message-bubble {
    background: #d32f2f;
    color: #fff;
    border-bottom-right-radius: 5px;
}

.chat-message.other .chat-message-bubble {
    background: rgba(255, 255, 255, 0.1);
    color: var(--menu-text);
    border-bottom-left-radius: 5px;
}

.chat-input-container {
    padding: 15px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    display: flex;
    gap: 10px;
}

.chat-input {
    flex: 1;
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 25px;
    padding: 12px 20px;
    color: var(--menu-text);
    font-family: 'Share Tech Mono', monospace;
    font-size: 0.9rem;
    transition: all 0.3s;
}

.chat-input:focus {
    outline: none;
    border-color: #d32f2f;
    background: rgba(255, 255, 255, 0.15);
}

.chat-send-btn {
    background: #d32f2f;
    border: none;
    color: #fff;
    width: 45px;
    height: 45px;
    border-radius: 50%;
    cursor: pointer;
    transition: all 0.3s;
    display: flex;
    align-items: center;
    justify-content: center;
}

.chat-send-btn:hover {
    background: #b71c1c;
    transform: scale(1.1);
}

.chat-toggle-btn {
    position: fixed;
    bottom: 20px;
    right: 80px;
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, #d32f2f, #b71c1c);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    box-shadow: 0 5px 20px rgba(211, 47, 47, 0.5);
    z-index: 150;
    transition: all 0.3s;
}

.chat-toggle-btn:hover {
    transform: scale(1.1);
    box-shadow: 0 8px 30px rgba(211, 47, 47, 0.7);
}

.chat-toggle-btn i {
    color: #fff;
    font-size: 1.5rem;
}

.chat-badge {
    position: absolute;
    top: -5px;
    right: -5px;
    background: #4caf50;
    color: #fff;
    width: 24px;
    height: 24px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.75rem;
    font-weight: bold;
    animation: pulse-badge 2s infinite;
}

@keyframes pulse-badge {
    0%, 100% {
        transform: scale(1);
    }
    50% {
        transform: scale(1.2);
    }
}

@media (max-width: 768px) {
    .chat-container {
        width: 100vw;
        height: 100vh;
        bottom: 0;
        right: 0;
        border-radius: 0;
    }

    .chat-header {
        border-radius: 0;
    }

    .chat-toggle-btn {
        bottom: 100px;
        right: 20px;
        width: 55px;
        height: 55px;
    }
}
*/

/* ============================================
   Logo Semilla del Sur (menú)
   ============================================ */
.menu-semilla-logo {
    margin-top: 10px !important;
    opacity: 0.85;
    transition: opacity 0.3s ease !important;
}
.menu-semilla-logo:hover { opacity: 1; }
.semilla-logo-img {
    height: 70px; width: auto;
    filter: drop-shadow(0 2px 8px rgba(0,0,0,0.4));
    transition: transform 0.3s ease, filter 0.3s ease;
}
.semilla-logo-img:hover {
    transform: scale(1.08);
    filter: drop-shadow(0 4px 16px rgba(255,255,255,0.3));
}

/* ============================================
   Privacy Policy Link (panel configuración)
   ============================================ */
.privacy-link {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    margin-top: 14px;
    padding: 9px 16px;
    background: rgba(211, 47, 47, 0.08);
    border: 1px solid rgba(211, 47, 47, 0.25);
    border-radius: 6px;
    color: #ef9a9a;
    font-family: 'Share Tech Mono', monospace;
    font-size: 0.78rem;
    letter-spacing: 0.08em;
    text-decoration: none;
    transition: all 0.2s ease;
}
.privacy-link:hover {
    background: rgba(211, 47, 47, 0.18);
    border-color: #d32f2f;
    color: #fff;
    transform: translateY(-1px);
}
.privacy-link i { font-size: 0.85rem; }

/* ============================================
   nmftSTUDIO — Firma en panel configuración
   ============================================ */
.nmft-signature {
    margin-top: 24px; padding-top: 18px;
    border-top: 1px solid rgba(255,255,255,0.07);
    text-align: center;
}
.nmft-link {
    display: inline-block; text-decoration: none;
    transition: opacity 0.3s ease;
}
.nmft-text {
    font-family: 'Share Tech Mono', monospace;
    font-size: 1rem; color: #546E7A;
    letter-spacing: 2px; opacity: 0.65;
    transition: all 0.3s ease; display: inline-block;
}
.nmft-text strong { color: #d32f2f; font-size: 1.08rem; }
.nmft-link:hover .nmft-text {
    opacity: 1;
    filter: drop-shadow(0 0 8px rgba(211,47,47,0.6));
}
.nmft-sub {
    font-family: 'Share Tech Mono', monospace;
    font-size: 0.7rem; color: #37474F;
    margin-top: 4px; letter-spacing: 1px;
}

/* ============================================
   MINI JUEGO — Radio Runner
   ============================================ */
.game-float-btn {
    position: fixed; bottom: 80px; left: 20px;
    width: 54px; height: 54px;
    background: linear-gradient(135deg, #d32f2f, #b71c1c);
    border: none; border-radius: 50%; font-size: 1.5rem;
    cursor: pointer; z-index: 150;
    box-shadow: 0 4px 20px rgba(211,47,47,0.5);
    transition: all 0.3s cubic-bezier(0.175,0.885,0.32,1.275);
    display: flex; align-items: center; justify-content: center;
    animation: gameBtnPulse 3.5s ease-in-out infinite;
}
.game-float-btn:hover {
    transform: scale(1.18) rotate(-8deg);
    box-shadow: 0 6px 30px rgba(211,47,47,0.7);
}
@keyframes gameBtnPulse {
    0%, 100% { box-shadow: 0 4px 20px rgba(211,47,47,0.5); }
    50%       { box-shadow: 0 4px 30px rgba(211,47,47,0.85), 0 0 0 9px rgba(211,47,47,0.12); }
}
.game-modal {
    position: fixed; inset: 0;
    background: rgba(0,0,0,0.88);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    z-index: 9999;
    display: flex; align-items: center; justify-content: center;
    opacity: 0; visibility: hidden;
    transition: opacity 0.3s ease, visibility 0.3s ease;
    pointer-events: none;
}
.game-modal.visible {
    opacity: 1; visibility: visible;
    pointer-events: all;
}
.game-modal-inner {
    background: #0d0d1a;
    border: 2px solid #d32f2f; border-radius: 14px;
    overflow: hidden;
    box-shadow: 0 24px 64px rgba(0,0,0,0.9), 0 0 40px rgba(211,47,47,0.25);
    max-width: 96vw;
}
.game-modal-header {
    background: linear-gradient(90deg, #b71c1c, #d32f2f, #b71c1c);
    padding: 10px 16px; display: flex;
    align-items: center; justify-content: space-between;
}
.game-modal-title {
    color: #fff; font-family: 'Share Tech Mono', monospace;
    font-size: 0.95rem; font-weight: bold;
    letter-spacing: 3px; text-shadow: 0 0 10px rgba(255,255,255,0.3);
}
.game-mute-btn {
    background: rgba(255,255,255,0.12);
    border: 1px solid rgba(255,255,255,0.2);
    color: #fff;
    width: 30px; height: 30px;
    border-radius: 50%; font-size: 0.85rem; cursor: pointer;
    transition: all 0.2s ease;
    display: flex; align-items: center; justify-content: center;
    line-height: 1;
}
.game-mute-btn:hover {
    background: rgba(255,255,255,0.25);
    transform: scale(1.1);
}
.game-mute-btn.muted {
    background: rgba(211,47,47,0.3);
    border-color: rgba(211,47,47,0.5);
}
.game-close-btn {
    background: rgba(255,255,255,0.15);
    border: 1px solid rgba(255,255,255,0.25);
    color: #fff; width: 30px; height: 30px;
    border-radius: 50%; font-size: 0.9rem; cursor: pointer;
    transition: all 0.2s ease;
    display: flex; align-items: center; justify-content: center;
    line-height: 1;
}
.game-close-btn:hover {
    background: rgba(255,255,255,0.35);
    transform: rotate(90deg) scale(1.1);
}
#game-canvas {
    display: block; width: 480px; max-width: 100%;
    height: auto; cursor: pointer;
    image-rendering: pixelated;
    image-rendering: crisp-edges;
    -ms-interpolation-mode: nearest-neighbor;
}
.game-hint {
    background: #060610; padding: 7px 16px;
    text-align: center; font-family: 'Share Tech Mono', monospace;
    font-size: 0.7rem; color: #37474F; letter-spacing: 1px;
    border-top: 1px solid rgba(211,47,47,0.2);
}
@media (max-width: 520px) {
    .game-float-btn { width: 46px; height: 46px; font-size: 1.3rem; bottom: 90px; left: 14px; }
    .game-modal-title { font-size: 0.8rem; letter-spacing: 2px; }
    .game-hint { font-size: 0.6rem; }
}