/* ===================================================================
   Global Styles & Variables
   ================================================================= */
: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;
    --shadow-color: rgba(0, 0, 0, 0.5);
    --card-shadow: 0 10px 30px -15px rgba(2, 12, 27, 0.7);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}

body {
    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: var(--accent-primary);
    transition: color 0.3s;
}

a:hover {
    color: var(--accent-primary-darker);
}

/* ===================================================================
   Header & Navigation
   ================================================================= */
header {
    background-color: rgba(10, 25, 47, 0.95);
    box-shadow: 0 2px 8px rgba(0,0,0,0.3);
    padding: 1rem 5%;
    backdrop-filter: blur(10px);
    position: sticky;
    top: 0;
    z-index: 1000;
    border-bottom: 1px solid var(--border-color);
}

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;
    margin: 0;
    padding: 0;
}

nav a {
    color: var(--text-normal);
    font-weight: 500;
    transition: color 0.3s;
    padding: 0.5rem 0;
    display: inline-block;
}

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

@media (max-width: 768px) {
    header { padding: 1rem; }
    nav { flex-direction: column; gap: 1rem; }
    nav ul { flex-wrap: wrap; justify-content: center; gap: 1rem; width: 100%; }
    nav a { font-size: 0.9rem; padding: 0.25rem 0; }
}

/* ===================================================================
   Main Content & Hero
   ================================================================= */
main {
    padding: 2rem 5%;
    max-width: 1000px;
    margin: 0 auto;
    width: 100%;
}

.hero {
    text-align: center;
    padding: 2.5rem;
    background-color: var(--bg-medium-dark);
    border-radius: 8px;
    box-shadow: var(--card-shadow);
    border: 1px solid var(--border-color);
    margin-bottom: 2rem;
}

.hero h1 {
    margin-bottom: 0.5rem;
    color: var(--text-bright);
    font-size: 2.5rem;
    font-weight: 600;
    line-height: 1.2;
}

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

@media (max-width: 600px) {
    main { padding: 1rem; }
    .hero { padding: 1.5rem 1rem; }
    .hero h1 { font-size: 1.8rem; }
    .hero p { font-size: 1rem; margin-bottom: 1.5rem; }
}

/* ===================================================================
   Prediction Form
   ================================================================= */
#drug-search-form {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
    text-align: left;
}

#drug-search-form fieldset {
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 1.5rem;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr)); 
    gap: 1.25rem;
    width: 100%;
}

#drug-search-form legend {
    color: var(--accent-primary);
    font-weight: 600;
    font-size: 1.1rem;
    padding: 0 0.5rem;
    margin-left: 0.5rem;
}

/* FIX: Changed selector to be direct child only. 
   This prevents it from targeting the inner dropdown divs. */
#drug-search-form fieldset > div {
    display: flex;
    flex-direction: column;
    position: relative; 
}

/* NEW FIX: Z-Index Stacking Context
   This ensures that when a user clicks a field (focus-within),
   that specific field's container rises above its siblings.
   This prevents the dropdown from being hidden behind the next row's inputs. */
#drug-search-form fieldset > div:focus-within {
    z-index: 100;
}

#drug-search-form label {
    font-size: 0.9rem;
    color: var(--text-normal);
    margin-bottom: 0.35rem;
    font-weight: 500;
}

#drug-search-form input, 
#drug-search-form select {
    width: 100%;
    padding: 0.75rem;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    font-size: 1rem; 
    background-color: var(--bg-light-dark);
    color: var(--text-bright);
    transition: border-color 0.3s, box-shadow 0.3s;
    appearance: none; 
}

#drug-search-form select {
    background-image: url("data:image/svg+xml;charset=UTF-8,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%23ccd6f6' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3e%3cpolyline points='6 9 12 15 18 9'%3e%3c/polyline%3e%3c/svg%3e");
    background-repeat: no-repeat;
    background-position: right 1rem center;
    background-size: 1em;
    padding-right: 2.5rem; 
}

#drug-search-form input:focus, 
#drug-search-form select:focus {
    outline: none;
    border-color: var(--accent-primary);
    box-shadow: 0 0 0 3px rgba(100, 255, 218, 0.1);
}

#drug-search-form input::placeholder {
    color: var(--text-muted);
}

/* --- Autocomplete --- */
.autocomplete-container {
    position: relative;
    width: 100%;
}

/* Added ID to increase specificity over any generic rules */
#drug-search-form .suggestions-box {
    display: none; 
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background-color: var(--bg-light-dark);
    border: 1px solid var(--accent-primary);
    border-top: none;
    border-radius: 0 0 4px 4px;
    max-height: 200px;
    overflow-y: auto;
    z-index: 9999; /* Increased z-index */
    box-shadow: 0 5px 15px rgba(0,0,0,0.5);
}

.suggestion-item {
    padding: 12px 10px;
    color: var(--text-normal);
    cursor: pointer;
    transition: background-color 0.2s;
    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);
}

/* --- Submit Button --- */
button[type="submit"] {
    padding: 1rem 1.5rem;
    background-color: var(--accent-primary);
    color: var(--accent-primary-text);
    border: none;
    border-radius: 4px;
    font-size: 1.1rem;
    font-weight: bold;
    letter-spacing: 0.5px;
    cursor: pointer;
    transition: background-color 0.3s, transform 0.2s;
    width: 100%;
    max-width: 300px;
    align-self: center;
    margin-top: 1rem;
}

button[type="submit"]:hover {
    background-color: var(--accent-primary-darker);
    transform: translateY(-2px);
    box-shadow: 0 4px 10px rgba(100, 255, 218, 0.1);
}

@media (max-width: 480px) {
    #drug-search-form fieldset {
        grid-template-columns: 1fr;
        padding: 1rem;
    }
}

/* ===================================================================
   Results Section
   ================================================================= */
.results-container {
    display: grid;
    grid-template-columns: 1fr;
    gap: 2rem;
    margin-top: 2.5rem;
    padding: 2.5rem;
    background-color: var(--bg-medium-dark);
    border-radius: 8px;
    box-shadow: var(--card-shadow);
    border: 1px solid var(--border-color);
}

@media (min-width: 768px) {
    .results-container {
        grid-template-columns: 1fr 1fr;
    }
}

@media (max-width: 600px) {
    .results-container {
        padding: 1.5rem;
        margin-top: 1.5rem;
    }
}

.results-container.hidden {
    display: none;
}

.result-box h3 {
    color: var(--accent-primary);
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 0.75rem;
    margin-bottom: 1rem;
    font-size: 1.25rem;
}

#risk-profile-list,
#side-effects-list {
    list-style-type: none;
    padding-left: 0;
    color: var(--text-bright);
}

#risk-profile-list li,
#side-effects-list li {
    margin-bottom: 0.75rem;
    position: relative;
    padding-left: 1.5rem;
    line-height: 1.5;
}

#risk-profile-list li::before,
#side-effects-list li::before {
    content: '»';
    position: absolute;
    left: 0;
    color: var(--accent-primary);
    font-weight: bold;
    top: -2px;
}

/* ===================================================================
   Footer
   ================================================================= */
footer {
    text-align: center;
    padding: 2rem 5%;
    margin-top: 3rem;
    background-color: var(--bg-medium-dark);
    color: var(--text-muted);
    font-size: 0.9rem;
    border-top: 1px solid var(--border-color);
}