/* ===================================================================
   1. GLOBAL VARIABLES & RESET
   ================================================================= */
:root {
    --bg-deep-dark: #0a192f;
    --bg-medium-dark: #172a46;
    --bg-light-dark: #2c3e50;
    --text-bright: #ccd6f6;
    --text-normal: #bdc3c7;
    --text-muted: #8892b0;
    --accent-primary: #64ffda;
    --accent-primary-darker: #52d3b4;
    --accent-primary-text: #0a192f;
    --border-color: #304a6e;
    --card-shadow: 0 10px 30px -15px rgba(2, 12, 27, 0.7);
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    background-color: var(--bg-deep-dark);
    color: var(--text-normal);
    line-height: 1.6;
    font-size: 16px;
    background-image: linear-gradient(rgba(10, 25, 47, 0.9), rgba(10, 25, 47, 0.9)),
                      url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" width="40" height="40" viewBox="0 0 40 40"><path fill="%23172a46" fill-opacity="0.3" d="M0 0 H40 V40 H0 Z M20 0 V40 M0 20 H40"></path></svg>');
    background-size: 40px 40px;
    background-repeat: repeat;
    overflow-x: hidden;
}

a {
    text-decoration: none;
    color: inherit;
    transition: color 0.3s;
}

/* ===================================================================
   2. HEADER & NAVIGATION (Responsive)
   ================================================================= */
header {
    background-color: rgba(10, 25, 47, 0.95);
    padding: 1rem 5%;
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 0;
    z-index: 1000;
    backdrop-filter: blur(10px);
}

nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    max-width: 1200px;
    margin: 0 auto;
    flex-wrap: wrap;
}

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

nav ul {
    list-style: none;
    display: flex;
    gap: 1.5rem;
}

nav a {
    color: var(--text-normal);
    font-weight: 500;
    padding: 0.5rem 0;
    font-size: 0.95rem;
}

nav a:hover, nav a.active {
    color: var(--accent-primary);
    border-bottom: 2px solid var(--accent-primary);
}

/* ===================================================================
   3. HERO & SEARCH LAYOUT
   ================================================================= */
main {
    max-width: 1100px;
    margin: 2rem auto;
    padding: 0 5%;
}

.hero {
    background-color: var(--bg-medium-dark);
    padding: 2.5rem;
    border-radius: 12px;
    box-shadow: var(--card-shadow);
    text-align: center;
    border: 1px solid var(--border-color);
}

.hero h1 {
    color: var(--text-bright);
    margin-bottom: 0.5rem;
    font-size: 2rem;
}

.hero p {
    color: var(--text-muted);
    font-size: 1.1rem;
    margin-bottom: 2rem;
}

/* --- The Search Container (Flexbox) --- */
.search-container {
    display: flex;
    align-items: stretch; /* Make both boxes same height */
    justify-content: center;
    margin-top: 2rem;
    gap: 20px;
}

.search-form {
    flex: 1;
    background: var(--bg-light-dark);
    padding: 2rem;
    border-radius: 8px;
    border: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    justify-content: center;
    transition: transform 0.2s, box-shadow 0.2s;
}

.search-form:hover {
    transform: translateY(-5px);
    box-shadow: 0 5px 15px rgba(0,0,0,0.3);
    border-color: var(--accent-primary);
}

.search-form h2 {
    font-size: 1.25rem;
    color: var(--accent-primary);
    margin-bottom: 1.5rem;
    text-align: center;
}

.or-divider {
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: bold;
    color: var(--text-bright);
    font-size: 1.1rem;
    background: var(--bg-deep-dark);
    width: 50px;
    height: 50px;
    border-radius: 50%;
    border: 2px solid var(--border-color);
    align-self: center;
    flex-shrink: 0; /* Prevent shrinking */
    z-index: 2;
}

/* ===================================================================
   4. FORM ELEMENTS
   ================================================================= */
.form-group {
    margin-bottom: 1.5rem;
    width: 100%;
    position: relative;
}

input[type="text"] {
    width: 100%;
    padding: 1rem;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    font-size: 1rem;
    background-color: var(--bg-medium-dark);
    color: var(--text-bright);
    transition: border-color 0.3s;
}

input:focus {
    outline: none;
    border-color: var(--accent-primary);
    box-shadow: 0 0 0 2px rgba(100, 255, 218, 0.1);
}

button[type="submit"] {
    width: 100%;
    padding: 1rem;
    background-color: var(--accent-primary);
    color: var(--accent-primary-text);
    border: none;
    border-radius: 6px;
    font-size: 1rem;
    font-weight: bold;
    cursor: pointer;
    transition: background-color 0.3s;
}

button[type="submit"]:hover {
    background-color: var(--accent-primary-darker);
}

/* --- Autocomplete Dropdown --- */
.autocomplete-container {
    position: relative;
}

.suggestions-box {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    z-index: 100;
    background-color: var(--bg-light-dark);
    border: 1px solid var(--accent-primary);
    border-top: none;
    max-height: 200px;
    overflow-y: auto;
    border-radius: 0 0 6px 6px;
    display: none;
    box-shadow: 0 10px 20px rgba(0,0,0,0.5);
    text-align: left;
}

.suggestion-item {
    padding: 12px 15px;
    cursor: pointer;
    transition: background-color 0.2s;
    color: var(--text-normal);
    border-bottom: 1px solid var(--border-color);
}

.suggestion-item:last-child { border-bottom: none; }

.suggestion-item:hover {
    background-color: var(--bg-medium-dark);
    color: var(--accent-primary);
}

/* ===================================================================
   5. RESULTS SECTION
   ================================================================= */
#results-section {
    margin-top: 3rem;
}

.hidden {
    display: none !important;
}

#results-section h2 {
    color: var(--text-bright);
    margin-bottom: 1.5rem;
    font-size: 1.5rem;
    border-left: 4px solid var(--accent-primary);
    padding-left: 1rem;
}

#results-section h3 {
    color: var(--text-normal);
    margin: 2rem 0 1rem 0;
}

#results-section h3 span {
    color: var(--accent-primary);
    font-style: italic;
}

/* Primary Drug Card */
#primary-drug-info {
    margin-bottom: 3rem;
    padding: 2rem;
    background: var(--bg-medium-dark);
    border-radius: 12px;
    border: 1px solid var(--border-color);
}

.drug-card {
    background-color: var(--bg-light-dark);
    padding: 1.5rem;
    border-radius: 8px;
    box-shadow: var(--card-shadow);
    border: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    transition: transform 0.2s;
}

.drug-card:hover {
    border-color: var(--accent-primary);
}

.drug-card.primary {
    border-left: 5px solid var(--accent-primary);
}

.drug-name {
    font-size: 1.4rem;
    font-weight: bold;
    color: var(--accent-primary);
    margin-bottom: 1rem;
    display: block;
}

.drug-card strong {
    color: var(--text-bright);
    display: block;
    margin-top: 0.5rem;
}

.side-effects-list {
    margin-top: 0.5rem;
    padding-left: 1.2rem;
    color: var(--text-normal);
    font-size: 0.95rem;
}

.side-effects-list li {
    margin-bottom: 0.25rem;
}

/* Alternatives Grid */
.results-grid {
    display: grid;
    /* Responsive Grid Logic */
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 1.5rem;
}

/* ===================================================================
   6. RESPONSIVE MEDIA QUERIES
   ================================================================= */

/* Tablet & Mobile Navigation */
@media (max-width: 900px) {
    header { padding: 1rem; }
    
    nav {
        flex-direction: column;
        gap: 1rem;
    }

    nav ul {
        flex-wrap: wrap;
        justify-content: center;
        width: 100%;
        gap: 1rem;
    }
}

/* Mobile Layout */
@media (max-width: 768px) {
    .hero {
        padding: 1.5rem;
    }

    .hero h1 { font-size: 1.75rem; }

    /* Stack the search forms */
    .search-container {
        flex-direction: column;
        gap: 1rem;
        align-items: stretch;
    }

    .or-divider {
        margin: 0.5rem auto; /* Center horizontally */
        transform: scale(0.8); /* Slightly smaller on mobile */
    }

    .search-form {
        width: 100%;
        padding: 1.5rem;
    }

    /* Adjust Grid for smaller phones */
    .results-grid {
        grid-template-columns: 1fr; /* Single column on phones */
    }
}

/* ===================================================================
   7. FOOTER
   ================================================================= */
footer {
    text-align: center;
    padding: 2rem 5%;
    margin-top: 4rem;
    background-color: var(--bg-medium-dark);
    color: var(--text-muted);
    font-size: 0.9rem;
    border-top: 1px solid var(--border-color);
}