/* --- HYBRID DESIGN SYSTEM --- */

:root {
    /* Light Mode Variables */
    --ios-blur: blur(20px);
    --glass-bg: rgba(255, 255, 255, 0.9);
    --glass-border: 1px solid rgba(255, 255, 255, 0.5);
    --primary-gradient: linear-gradient(135deg, #2563eb, #4f46e5);
    --app-bg: #f8fafc; /* Slate-50 */
    --text-main: #0f172a; /* Slate-900 */
    --text-secondary: #64748b; /* Slate-500 */
    --card-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.05), 0 2px 4px -1px rgba(0, 0, 0, 0.03);

    /* Mesh Gradient Colors (Light) */
    --mesh-bg-color: #f8fafc;
    --mesh-blob-1: hsla(189,100%,56%,0.05);
    --mesh-blob-2: hsla(355,100%,93%,0.15);
    --mesh-blob-3: hsla(340,100%,76%,0.05);
    --mesh-blob-4: hsla(22,100%,77%,0.05);
    --mesh-blob-5: hsla(242,100%,70%,0.05);
    --mesh-blob-6: hsla(343,100%,76%,0.05);
}

/* Dark Mode Variables (Calm & Readable) */
.dark {
    /* Higher opacity surfaces, less glass */
    --glass-bg: rgba(30, 41, 59, 0.95); /* Slate-800 95% */
    --glass-border: 1px solid rgba(255, 255, 255, 0.08);
    --app-bg: #0f172a; /* Slate-900 */
    --text-main: #f1f5f9; /* Slate-100 */
    --text-secondary: #94a3b8; /* Slate-400 */
    --card-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.5), 0 2px 4px -1px rgba(0, 0, 0, 0.3);

    /* Muted Mesh Gradient (Very subtle) */
    --mesh-bg-color: #0f172a;
    --mesh-blob-1: hsla(220, 100%, 50%, 0.03);
    --mesh-blob-2: hsla(280, 100%, 50%, 0.03);
    --mesh-blob-3: hsla(320, 100%, 50%, 0.03);
    --mesh-blob-4: hsla(180, 100%, 50%, 0.03);
    --mesh-blob-5: hsla(260, 100%, 60%, 0.03);
    --mesh-blob-6: hsla(340, 100%, 60%, 0.03);
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    background-color: var(--app-bg);
    color: var(--text-main);
    -webkit-tap-highlight-color: transparent;
    transition: background-color 0.3s ease, color 0.3s ease;
}

/* Mesh Background */
.mesh-bg {
    position: fixed;
    top: 0; left: 0; width: 100vw; height: 100vh;
    background-color: var(--mesh-bg-color);
    background-image:
        radial-gradient(at 80% 0%, var(--mesh-blob-1) 0px, transparent 50%),
        radial-gradient(at 0% 50%, var(--mesh-blob-2) 0px, transparent 50%),
        radial-gradient(at 80% 50%, var(--mesh-blob-3) 0px, transparent 50%),
        radial-gradient(at 0% 100%, var(--mesh-blob-4) 0px, transparent 50%),
        radial-gradient(at 80% 100%, var(--mesh-blob-5) 0px, transparent 50%),
        radial-gradient(at 0% 0%, var(--mesh-blob-6) 0px, transparent 50%);
    z-index: -1;
    transition: background-color 0.5s ease;
    pointer-events: none;
}

/* Glass Card */
.glass-card {
    background: var(--glass-bg);
    backdrop-filter: var(--ios-blur);
    -webkit-backdrop-filter: var(--ios-blur);
    border: var(--glass-border);
    border-radius: 1rem;
    box-shadow: var(--card-shadow);
    transition: background 0.3s ease, border-color 0.3s ease, box-shadow 0.3s ease;
}

/* Inputs */
.input-premium {
    background-color: rgba(255, 255, 255, 1);
    border: 1px solid #cbd5e1; /* Slate-300 */
    border-radius: 0.75rem;
    transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    color: #1e293b; /* Slate-800 */
}
.dark .input-premium {
    background-color: rgba(15, 23, 42, 0.6); /* Slate-900 */
    border-color: rgba(255,255,255,0.15);
    color: #f1f5f9; /* Slate-100 */
}
.input-premium:focus {
    transform: translateY(-1px);
    border-color: #6366f1; /* Indigo-500 */
    box-shadow: 0 4px 12px rgba(99, 102, 241, 0.15);
    outline: none;
}
.dark .input-premium::placeholder {
    color: #64748b; /* Slate-500 */
}

/* Buttons */
.btn-primary {
    background: var(--primary-gradient);
    border-radius: 0.75rem;
    color: white;
    font-weight: 600;
    box-shadow: 0 4px 6px -1px rgba(37, 99, 235, 0.3);
    transition: transform 0.1s, box-shadow 0.2s;
}
.btn-primary:hover {
    box-shadow: 0 10px 15px -3px rgba(37, 99, 235, 0.4);
}
.btn-primary:active { transform: scale(0.98); }

.btn-secondary {
    background: white;
    border: 1px solid #e2e8f0;
    color: #475569;
    border-radius: 0.75rem;
    font-weight: 600;
    box-shadow: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    transition: background-color 0.2s;
}
.dark .btn-secondary {
    background: rgba(30, 41, 59, 0.8);
    border-color: rgba(255,255,255,0.1);
    color: #cbd5e1;
}
.btn-secondary:hover { background-color: #f1f5f9; }
.dark .btn-secondary:hover { background-color: rgba(255,255,255,0.15); }
.btn-secondary:active { transform: scale(0.98); }

/* Animations */
.tab-content { display: none; animation: fadeScale 0.3s cubic-bezier(0.4, 0, 0.2, 1); }
.tab-content.active { display: block; }

@keyframes fadeScale {
    from { opacity: 0; transform: scale(0.98); }
    to { opacity: 1; transform: scale(1); }
}

@keyframes slideIn {
    from { opacity: 0; transform: translateX(-10px); }
    to { opacity: 1; transform: translateX(0); }
}

.cart-item { animation: slideIn 0.3s ease-out; }

.custom-scroll::-webkit-scrollbar { width: 4px; }
.custom-scroll::-webkit-scrollbar-track { background: transparent; }
.custom-scroll::-webkit-scrollbar-thumb { background: #cbd5e1; border-radius: 10px; }
.dark .custom-scroll::-webkit-scrollbar-thumb { background: #475569; }

.animate-fade-in {
    animation: fadeIn 0.3s ease-in-out;
}
@keyframes fadeIn {
    from { opacity: 0; transform: translateY(-5px); }
    to { opacity: 1; transform: translateY(0); }
}

@media (min-width: 768px) {
    #tab-order.active, #tab-history.active, #tab-settings.active {
        display: grid;
    }
}

/* Header Scroll Effects */
.header-hidden {
    transform: translateY(-100%);
    transition: transform 0.3s ease-in-out;
}

.header-compact .glass-card {
    padding-top: 0.5rem !important;
    padding-bottom: 0.5rem !important;
    margin-top: 0 !important;
    margin-bottom: 0 !important;
    border-radius: 0 0 1rem 1rem !important;
    transition: all 0.3s ease-in-out;
}

/* Compact Navigation (Mobile) */
.nav-compact {
    transform: translateY(30%); /* Push down slightly or reduce height */
    padding-top: 0 !important;
    padding-bottom: 0 !important;
}
.nav-compact .nav-label {
    display: none; /* Hide labels */
}
.nav-compact .nav-icon-container {
    padding: 0.5rem !important; /* Smaller padding */
}

/* Ensure header stays above everything */
header {
    transition: transform 0.3s ease-in-out;
    width: 100%;
}