/* ==========================================
   Global Reset & Defaults
   ========================================== */
:root {
    --primary: #0284c7;
    --background: #f0f4f8;
    --surface: #ffffff;
}

body {
    margin: 0;
    padding: 0;
    font-family: 'Inter', sans-serif;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* ==========================================
   Custom Scrollbars (Chrome/Safari/Webkit)
   ========================================== */
.custom-scrollbar::-webkit-scrollbar {
    width: 6px;
    height: 6px;
}

.custom-scrollbar::-webkit-scrollbar-track {
    background: transparent;
}

.custom-scrollbar::-webkit-scrollbar-thumb {
    background: #cbd5e1;
    /* Slate 300 */
    border-radius: 3px;
}

.custom-scrollbar::-webkit-scrollbar-thumb:hover {
    background: #94a3b8;
    /* Slate 400 */
}

/* ==========================================
   Animations
   ========================================== */
@keyframes fadeIn {
    from {
        opacity: 0;
    }

    to {
        opacity: 1;
    }
}

.fade-enter {
    animation: fadeIn 0.5s ease-out forwards;
}

@keyframes slideInRight {
    from {
        transform: translateX(100%);
    }

    to {
        transform: translateX(0);
    }
}

@keyframes slideOutRight {
    from {
        transform: translateX(0);
    }

    to {
        transform: translateX(100%);
    }
}

@keyframes heartbeat {

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

    15% {
        transform: scale(1.15);
    }

    30% {
        transform: scale(1)
    }

    45% {
        transform: scale(1.15);
    }

    60% {
        transform: scale(1);
    }
}

.animate-heartbeat {
    animation: heartbeat 1s ease-in-out infinite;
}

/* ==========================================
   Utility Classes & Overrides
   ========================================== */
.glass-panel {
    background: rgba(255, 255, 255, 0.75);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid rgba(0, 0, 0, 0.08);
}

.text-glow {
    text-shadow: 0 0 10px currentColor;
}

/* Video Overlay Patterns */
.scanline {
    background: linear-gradient(to bottom,
            rgba(255, 255, 255, 0),
            rgba(255, 255, 255, 0) 50%,
            rgba(0, 0, 0, 0.05) 50%,
            rgba(0, 0, 0, 0.05));
    background-size: 100% 4px;
}

/* Range input styling (for future implementation if needed) */
input[type=range] {
    -webkit-appearance: none;
    background: transparent;
}

input[type=range]::-webkit-slider-thumb {
    -webkit-appearance: none;
}

input[type=range]:focus {
    outline: none;
}

/* ==========================================
   Drill-Down Menu
   ========================================== */

#menu-panel {
    transition: opacity 0.3s ease-in-out;
}
#menu-panel.fading {
    opacity: 0;
    pointer-events: none;
}
#menu-panel.visible {
    opacity: 1;
}

.menu-group-label {
    font-size: 10px;
    font-weight: 700;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: #94a3b8;
    padding: 0 4px;
    display: flex;
    align-items: center;
    gap: 5px;
    margin-bottom: 6px;
}

.btn-category {
    display: flex;
    align-items: center;
    width: 100%;
    padding: 10px 14px;
    border-radius: 10px;
    border: 1px solid #e2e8f0;
    background: #ffffff;
    font-size: 13px;
    font-weight: 700;
    letter-spacing: 0.05em;
    text-transform: uppercase;
    color: #475569;
    cursor: pointer;
    transition: all 0.18s ease;
    text-align: left;
}
.btn-category:hover {
    background: #f0f9ff;
    border-color: #7dd3fc;
    color: #0284c7;
    transform: translateX(3px);
    box-shadow: 0 2px 8px rgba(2,132,199,0.12);
}


.selected-category-label {
    font-size: 11px;
    font-weight: 700;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: #0284c7;
    background: #e0f2fe;
    border: 1px solid #7dd3fc;
    border-radius: 8px;
    padding: 6px 12px;
    text-align: center;
    margin-bottom: 4px;
}

.btn-temp {
    width: 100%;
    padding: 12px 14px;
    border-radius: 10px;
    border: 1px solid;
    font-size: 13px;
    font-weight: 700;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    cursor: pointer;
    transition: all 0.18s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
}
.btn-temp:hover { transform: translateX(3px); }
.btn-temp.cold { background:#eff6ff; border-color:#93c5fd; color:#1d4ed8; }
.btn-temp.cold:hover { background:#dbeafe; border-color:#3b82f6; box-shadow:0 4px 14px rgba(59,130,246,0.25); }
.btn-temp.normal { background:#f0fdf4; border-color:#86efac; color:#15803d; }
.btn-temp.normal:hover { background:#dcfce7; border-color:#22c55e; box-shadow:0 4px 14px rgba(34,197,94,0.25); }
.btn-temp.heat { background:#fff7ed; border-color:#fdba74; color:#c2410c; }
.btn-temp.heat:hover { background:#ffedd5; border-color:#f97316; box-shadow:0 4px 14px rgba(249,115,22,0.25); }
.btn-temp.active-cold { background:#1d4ed8; border-color:#1d4ed8; color:#fff; box-shadow:0 4px 14px rgba(29,78,216,0.35); }
.btn-temp.active-normal { background:#15803d; border-color:#15803d; color:#fff; box-shadow:0 4px 14px rgba(21,128,61,0.35); }
.btn-temp.active-heat { background:#c2410c; border-color:#c2410c; color:#fff; box-shadow:0 4px 14px rgba(194,65,12,0.35); }

.btn-back {
    display: flex;
    align-items: center;
    gap: 6px;
    width: 100%;
    padding: 9px 14px;
    border-radius: 9px;
    border: 1px solid #e2e8f0;
    background: #f8fafc;
    font-size: 12px;
    font-weight: 700;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    color: #64748b;
    cursor: pointer;
    transition: all 0.18s ease;
}
.btn-back:hover { background:#f1f5f9; border-color:#94a3b8; color:#334155; }