/* ═══════════════════════════════════════════════════════════════
   LIQUID GLASS — Design System
   Inspirado en iOS 26 / Apple WWDC 2025
   ═══════════════════════════════════════════════════════════════ */

/* ── Variables del sistema ─────────────────────────────────────── */
:root {
    /* Glass surfaces */
    --glass-bg:          rgba(255, 255, 255, 0.06);
    --glass-bg-hover:    rgba(255, 255, 255, 0.09);
    --glass-bg-active:   rgba(255, 255, 255, 0.12);
    --glass-border:      rgba(255, 255, 255, 0.12);
    --glass-border-top:  rgba(255, 255, 255, 0.22);  /* specular highlight */
    --glass-shadow:      0 8px 32px rgba(0, 0, 0, 0.35),
                         0 2px 8px rgba(0, 0, 0, 0.2),
                         inset 0 1px 0 rgba(255, 255, 255, 0.15);
    --glass-blur:        blur(20px) saturate(180%);

    /* Tinted glass */
    --glass-yellow:      rgba(234, 179, 8, 0.08);
    --glass-blue:        rgba(59, 130, 246, 0.08);
    --glass-green:       rgba(16, 185, 129, 0.08);
    --glass-red:         rgba(239, 68, 68, 0.08);
    --glass-purple:      rgba(139, 92, 246, 0.08);

    /* Bordes tintados */
    --glass-border-yellow: rgba(234, 179, 8, 0.25);
    --glass-border-blue:   rgba(59, 130, 246, 0.25);
    --glass-border-green:  rgba(16, 185, 129, 0.25);
    --glass-border-red:    rgba(239, 68, 68, 0.25);

    /* Radios */
    --radius-sm:  12px;
    --radius-md:  18px;
    --radius-lg:  24px;
    --radius-xl:  32px;
    --radius-pill: 999px;
}

/* ── Clase base .glass ─────────────────────────────────────────── */
.glass {
    background: var(--glass-bg);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    border: 1px solid var(--glass-border);
    border-top-color: var(--glass-border-top);
    box-shadow: var(--glass-shadow);
    border-radius: var(--radius-lg);
    transition: background 0.2s ease, box-shadow 0.2s ease;
}

.glass:active,
.glass.active {
    background: var(--glass-bg-active);
}

/* ── Tarjetas glass ────────────────────────────────────────────── */
.glass-card {
    background: var(--glass-bg);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    border-radius: var(--radius-lg);
    border: 1px solid var(--glass-border);
    border-top-color: var(--glass-border-top);
    box-shadow: var(--glass-shadow);
    padding: 18px;
    position: relative;
    overflow: hidden;
    transition: all 0.25s cubic-bezier(0.34, 1.56, 0.64, 1);
}

/* Efecto shimmer/specular en hover */
.glass-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 60%;
    height: 100%;
    background: linear-gradient(
        105deg,
        transparent 40%,
        rgba(255, 255, 255, 0.06) 50%,
        transparent 60%
    );
    transition: left 0.5s ease;
    pointer-events: none;
}

.glass-card:active::before {
    left: 150%;
}

/* ── Variantes de color ────────────────────────────────────────── */
.glass-yellow { background: linear-gradient(135deg, var(--glass-yellow), rgba(20,30,50,0.4)); border-color: var(--glass-border-yellow); }
.glass-blue   { background: linear-gradient(135deg, var(--glass-blue),   rgba(20,30,50,0.4)); border-color: var(--glass-border-blue);   }
.glass-green  { background: linear-gradient(135deg, var(--glass-green),  rgba(20,30,50,0.4)); border-color: var(--glass-border-green);  }
.glass-red    { background: linear-gradient(135deg, var(--glass-red),    rgba(20,30,50,0.4)); border-color: var(--glass-border-red);    }

/* ── Botones glass ─────────────────────────────────────────────── */
.btn-glass {
    background: var(--glass-bg);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    border: 1px solid var(--glass-border);
    border-top-color: var(--glass-border-top);
    border-radius: var(--radius-pill);
    color: var(--text-primary);
    font-weight: 700;
    font-size: 0.875rem;
    padding: 12px 24px;
    cursor: pointer;
    transition: all 0.2s ease;
    box-shadow: 0 4px 16px rgba(0,0,0,0.2), inset 0 1px 0 rgba(255,255,255,0.1);
    position: relative;
    overflow: hidden;
}

.btn-glass:active {
    transform: scale(0.97);
    background: var(--glass-bg-active);
}

.btn-glass-primary {
    background: linear-gradient(135deg, rgba(234,179,8,0.25), rgba(234,179,8,0.1));
    border-color: rgba(234, 179, 8, 0.4);
    color: #EAB308;
}

.btn-glass-primary:active {
    background: linear-gradient(135deg, rgba(234,179,8,0.4), rgba(234,179,8,0.2));
}

/* ── Bottom nav glass ──────────────────────────────────────────── */
.bottom-nav-glass {
    background: rgba(2, 6, 23, 0.8);
    backdrop-filter: blur(24px) saturate(200%);
    -webkit-backdrop-filter: blur(24px) saturate(200%);
    border-top: 1px solid rgba(255, 255, 255, 0.08);
    box-shadow: 0 -4px 20px rgba(0, 0, 0, 0.3);
}

/* ── Header glass ──────────────────────────────────────────────── */
.header-glass {
    background: rgba(2, 6, 23, 0.75);
    backdrop-filter: blur(24px) saturate(200%);
    -webkit-backdrop-filter: blur(24px) saturate(200%);
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.2);
}

/* ── Inputs glass ──────────────────────────────────────────────── */
.input-glass {
    background: rgba(255, 255, 255, 0.05);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-md);
    color: #fff;
    padding: 12px 16px;
    font-size: 0.9rem;
    width: 100%;
    transition: all 0.2s ease;
    outline: none;
}

.input-glass:focus {
    background: rgba(255, 255, 255, 0.08);
    border-color: rgba(234, 179, 8, 0.5);
    box-shadow: 0 0 0 3px rgba(234, 179, 8, 0.1);
}

.input-glass::placeholder { color: rgba(255,255,255,0.3); }

/* ── Modal glass ───────────────────────────────────────────────── */
.modal-glass {
    background: rgba(10, 15, 30, 0.85);
    backdrop-filter: blur(30px) saturate(200%);
    -webkit-backdrop-filter: blur(30px) saturate(200%);
    border: 1px solid rgba(255, 255, 255, 0.12);
    border-top-color: rgba(255, 255, 255, 0.22);
    border-radius: var(--radius-xl);
    box-shadow:
        0 24px 60px rgba(0, 0, 0, 0.5),
        0 8px 24px rgba(0, 0, 0, 0.3),
        inset 0 1px 0 rgba(255, 255, 255, 0.15);
}

/* ── Pill badge glass ──────────────────────────────────────────── */
.badge-glass {
    background: rgba(255, 255, 255, 0.08);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    border: 1px solid rgba(255, 255, 255, 0.12);
    border-radius: var(--radius-pill);
    padding: 4px 12px;
    font-size: 0.7rem;
    font-weight: 700;
    letter-spacing: 0.5px;
}

/* ── Glow effects ──────────────────────────────────────────────── */
.glow-yellow { box-shadow: 0 0 20px rgba(234, 179, 8, 0.3), 0 0 40px rgba(234, 179, 8, 0.1); }
.glow-blue   { box-shadow: 0 0 20px rgba(59, 130, 246, 0.3), 0 0 40px rgba(59, 130, 246, 0.1); }
.glow-green  { box-shadow: 0 0 20px rgba(16, 185, 129, 0.3), 0 0 40px rgba(16, 185, 129, 0.1); }
.glow-red    { box-shadow: 0 0 20px rgba(239, 68, 68, 0.4),  0 0 40px rgba(239, 68, 68, 0.15); }

/* ── Animaciones ───────────────────────────────────────────────── */
@keyframes glass-appear {
    from { opacity: 0; transform: translateY(12px) scale(0.98); backdrop-filter: blur(0); }
    to   { opacity: 1; transform: translateY(0)    scale(1);    backdrop-filter: var(--glass-blur); }
}

.glass-appear {
    animation: glass-appear 0.3s cubic-bezier(0.34, 1.56, 0.64, 1) both;
}

/* ── Scrollbar glass ───────────────────────────────────────────── */
::-webkit-scrollbar { width: 4px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb {
    background: rgba(255, 255, 255, 0.15);
    border-radius: 4px;
}
::-webkit-scrollbar-thumb:hover { background: rgba(255, 255, 255, 0.25); }

/* ── Responsive: reduce blur en dispositivos lentos ────────────── */
@media (prefers-reduced-motion: reduce) {
    .glass, .glass-card, .btn-glass, .modal-glass {
        backdrop-filter: none;
        -webkit-backdrop-filter: none;
        background: rgba(15, 23, 42, 0.9);
    }
}