:root {
    --bg: #0a0f18;
    --glass: rgba(255, 255, 255, 0.05);
    --glass-border: rgba(255, 255, 255, 0.1);
    --text: #ffffff;
    --accent: #6366f1;
    --card-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.37);
    --safe: #22c55e;
    --warn: #eab308;
    --danger: #ef4444;
}

/* THEMES */
[data-theme="light"] {
    --bg: #f8fafc; --glass: rgba(0, 0, 0, 0.03); --glass-border: rgba(0, 0, 0, 0.1); --text: #0f172a; --accent: #2563eb;
}
[data-theme="synthwave"] {
    --bg: #1a0633; --glass: rgba(255, 0, 255, 0.1); --glass-border: #ff00ff; --text: #3fffd2; --accent: #ff00ff;
}
[data-theme="matrix"] {
    --bg: #000000; --glass: rgba(0, 255, 0, 0.05); --glass-border: #00ff41; --text: #00ff41; --accent: #008f11;
    font-family: 'Fira Code', monospace !important;
}
[data-theme="dracula"] {
    --bg: #282a36; --glass: rgba(68, 71, 90, 0.5); --glass-border: #6272a4; --text: #f8f8f2; --accent: #bd93f9;
}

* { box-sizing: border-box; -webkit-tap-highlight-color: transparent; }

body {
    background-color: var(--bg);
    color: var(--text);
    font-family: 'Outfit', sans-serif;
    margin: 0;
    min-height: 100vh;
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.app-container { max-width: 800px; margin: 0 auto; padding: 20px; }

header {
    position: sticky; top: 0; z-index: 100;
    background: var(--bg); padding-bottom: 10px;
}

.top-bar { display: flex; justify-content: space-between; align-items: center; margin-bottom: 20px; }

.logo { font-weight: 700; font-size: 1.5rem; letter-spacing: -1px; }
.logo span { color: var(--accent); }

select {
    background: var(--glass); color: var(--text); border: 1px solid var(--glass-border);
    padding: 8px; border-radius: 10px; outline: none;
}

.search-wrapper { position: relative; margin-bottom: 20px; }
#search-input {
    width: 100%; padding: 16px 20px; padding-left: 50px;
    background: var(--glass); border: 1px solid var(--glass-border);
    border-radius: 20px; color: var(--text); font-size: 1rem; backdrop-filter: blur(10px);
}

.search-icon { position: absolute; left: 20px; top: 50%; transform: translateY(-50%); opacity: 0.5; }

.filter-nav { display: flex; overflow-x: auto; gap: 10px; padding-bottom: 10px; scrollbar-width: none; }
.filter-nav::-webkit-scrollbar { display: none; }

.filter-btn {
    background: var(--glass); border: 1px solid var(--glass-border); color: var(--text);
    padding: 10px 20px; border-radius: 15px; white-space: nowrap; transition: 0.3s;
}

.filter-btn.active { background: var(--accent); color: white; border-color: var(--accent); }

/* GRID */
.substance-grid {
    display: grid; grid-template-columns: 1fr 1fr; gap: 15px; margin-top: 10px;
}

@media (max-width: 400px) { .substance-grid { grid-template-columns: 1fr; } }

.card {
    background: var(--glass); border: 1px solid var(--glass-border);
    padding: 20px; border-radius: 24px; backdrop-filter: blur(5px);
    transition: transform 0.2s, box-shadow 0.2s;
    animation: slideIn 0.5s ease-out;
}

.card:active { transform: scale(0.95); }

.card .tag { font-size: 0.65rem; text-transform: uppercase; letter-spacing: 1px; color: var(--accent); font-weight: 700; }
.card h3 { margin: 8px 0; font-size: 1.1rem; }

/* MODAL */
.modal {
    display: none; position: fixed; inset: 0; z-index: 1000;
}

.modal-overlay {
    position: absolute; inset: 0; background: rgba(0,0,0,0.7); backdrop-filter: blur(8px);
}

.modal-content {
    position: absolute; bottom: 0; left: 0; right: 0;
    background: var(--bg); border-top: 1px solid var(--glass-border);
    border-radius: 30px 30px 0 0; padding: 30px;
    max-height: 90vh; overflow-y: auto;
    transform: translateY(100%); transition: transform 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}

.modal.active { display: block; }
.modal.active .modal-content { transform: translateY(0); }

.handle { width: 40px; height: 5px; background: var(--glass-border); margin: -10px auto 20px; border-radius: 10px; }

.dose-row { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 10px; margin: 20px 0; }
.dose-box { padding: 12px; border-radius: 15px; background: var(--glass); text-align: center; font-size: 0.85rem; }
.dose-box span { display: block; font-weight: 700; margin-bottom: 4px; }

.box-weak { border-bottom: 3px solid var(--safe); }
.box-med { border-bottom: 3px solid var(--warn); }
.box-strong { border-bottom: 3px solid var(--danger); }

.info-section { margin-top: 20px; }
.info-section h4 { font-size: 0.9rem; margin-bottom: 8px; opacity: 0.6; text-transform: uppercase; }
.info-section p { line-height: 1.5; font-size: 0.95rem; }

.close-btn { float: right; cursor: pointer; font-size: 1.5rem; }

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