@import url('https://fonts.googleapis.com/css2?family=Space+Mono&display=swap');

/* Base Variables - Hacker Theme */
:root {
    /* core palette */
    --bg-color: #000000;                        /* pure black */
    --card-bg: rgba(0, 0, 0, 0.8);              /* translucent terminal window */
    --text-main: #00ff00;                       /* bright green text */
    --text-muted: #008800;                      /* darker green for secondary text */
    --primary: #00ff00;                         /* use green as primary highlight */
    --primary-hover: #33ff33;
    --border-color: #005500;                    /* dark green border */

    /* Status Colors stay but tinted greenish */
    --success: #00bb00;
    --warning: #aaff00;
    --danger: #ff0066;
    --info: #00aaff;

    --border-radius: 4px;
    --transition: all 0.2s ease;
}

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

body {
    background-color: var(--bg-color);
    color: var(--text-main);
    line-height: 1.6;
    font-family: "Space Mono", "Courier New", monospace;
    background-image: linear-gradient(0deg, #000000 50%, #0e0e0e 50%);
    background-size: 10px 10px;
}
a { color: var(--primary); text-decoration: none; }
ul { list-style: none; }

/* Layouts */
.center-layout { display: flex; flex-direction: column; align-items: center; justify-content: center; min-height: 100vh; text-align: center; }
.container { max-width: 1200px; margin: 0 auto; padding: 20px; }
.mt-4 { margin-top: 2rem; }

/* Navbar */
.navbar { background-color: var(--card-bg); border-bottom: 1px solid var(--border-color); padding: 1rem 2rem; display: flex; justify-content: space-between; align-items: center; position: relative; flex-wrap: wrap; }
.nav-brand a { font-size: 1.5rem; font-weight: bold; color: var(--text-main); }
.nav-links {
    display: flex;
    align-items: center;
    transition: max-height 0.3s ease;
}
.nav-links a { margin-left: 1.5rem; color: var(--text-muted); font-weight: 500; transition: var(--transition); }
.nav-links a:hover, .nav-links a.active { color: var(--text-main); }

/* hamburger toggle */
.nav-toggle { display: none; flex-direction: column; justify-content: center; cursor: pointer; }
.nav-toggle span { display: block; width: 25px; height: 3px; background: var(--text-main); margin: 4px 0; transition: var(--transition); }

/* Mobile behaviour */
@media (max-width: 768px) {
    .nav-links { 
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: var(--card-bg);
        flex-direction: column;
        overflow: hidden;
        max-height: 0;
    }
    .nav-links.active { max-height: 300px; /* enough for links */ }
    .nav-links a { margin: 10px 0; padding: 10px 20px; }
    .nav-toggle { display: flex; }
    .theme-switch-wrapper { order: 1; }
}

/* Cards */
.card { background-color: var(--card-bg); border-radius: var(--border-radius); padding: 20px; border: 1px solid var(--border-color); box-shadow: 0 4px 6px rgba(0,0,0,0.1); margin-bottom: 20px; }
.card h2, .card h3 { margin-bottom: 15px; color: var(--text-main); }

/* Search Component */
.search-container { width: 100%; max-width: 500px; background: rgba(0,0,0,0.7); padding: 30px; border: 1px solid var(--border-color); border-radius: var(--border-radius); box-shadow: 0 0 10px var(--primary); }
@media (max-width: 600px) {
    .search-container { max-width: 90%; padding: 20px; }
}

/* make course table scroll on narrow screens */
.table-responsive { overflow-x: auto; }

/* smaller, spaced extra course button */
#addOptionalBtn {
    padding: 8px 16px;
    font-size: 0.9rem;
    margin-top: 15px;
}

/* Calculator input styling */
.target-cgpa-card input[type="number"] {
    width: 100%;
    padding: 10px 12px;
    margin: 10px 0;
    background: var(--bg-color);
    border: 1px solid var(--border-color);
    color: var(--text-main);
    border-radius: var(--border-radius);
    font-size: 1rem;
    outline: none;
    transition: var(--transition);
    box-sizing: border-box;
}
.target-cgpa-card input[type="number"]:focus {
    border-color: var(--primary);
    box-shadow: 0 0 4px rgba(255, 161, 22, 0.3);
}
.target-cgpa-card p { margin: 8px 0; }
.target-cgpa-card small { display: block; margin-top: 10px; color: var(--text-muted); }
.target-cgpa-card #requiredSgpaResult {
    margin-top: 12px;
    padding: 10px;
    background: rgba(255, 161, 22, 0.1);
    border-left: 3px solid var(--primary);
    border-radius: 4px;
    color: var(--text-main);
    font-weight: 500;
}
.search-container h1 { font-size: 2.5rem; margin-bottom: 10px; }
.search-container p { color: var(--text-muted); margin-bottom: 20px; }
.search-box { display: flex; position: relative; width: 100%; margin-bottom: 20px; }
.search-box input { flex: 1; padding: 12px 15px; background: var(--bg-color); border: 1px solid var(--border-color); color: var(--text-main); border-radius: var(--border-radius) 0 0 var(--border-radius); font-size: 1rem; outline: none; transition: var(--transition); }
.search-box input:focus { border-color: var(--primary); }
.search-box button { padding: 12px 20px; background: var(--primary); color: #fff; border: none; font-weight: bold; border-radius: 0 var(--border-radius) var(--border-radius) 0; cursor: pointer; transition: var(--transition); }
.search-box button:hover { background: var(--primary-hover); }

/* Dropdown Results */
.dropdown-results { position: absolute; top: 100%; left: 0; right: 0; background: var(--card-bg); border: 1px solid var(--border-color); border-radius: 0 0 var(--border-radius) var(--border-radius); max-height: 200px; overflow-y: auto; z-index: 10; display: none; text-align: left; }
.dropdown-item { padding: 10px 15px; cursor: pointer; border-bottom: 1px solid var(--border-color); transition: background 0.2s; }
.dropdown-item:hover { background: var(--border-color); }
.dropdown-item:last-child { border-bottom: none; }

/* placeholder color */
input::placeholder { color: var(--text-muted); opacity: 0.7; }

.btn, .link-btn { display: inline-block; padding: 10px 20px; background: var(--card-bg); border: 1px solid var(--border-color); color: var(--text-main); border-radius: var(--border-radius); transition: var(--transition); cursor: pointer; }
.btn:hover, .link-btn:hover { background: var(--border-color); border-color: var(--primary); }

/* Dashboard Grid */
.dashboard-grid { display: grid; grid-template-columns: 1fr 2fr; gap: 20px; }
@media (max-width: 768px) { .dashboard-grid { grid-template-columns: 1fr; } }

/* Profile & Stats */
.subtitle { color: var(--text-muted); margin-bottom: 10px; font-family: monospace; }
.badge { display: inline-block; padding: 5px 12px; border-radius: 20px; font-size: 0.85rem; font-weight: bold; }
.badge.excellent { background: rgba(44, 187, 93, 0.2); color: var(--success); }
.badge.very-good { background: rgba(10, 132, 255, 0.2); color: var(--info); }
.badge.good { background: rgba(255, 192, 30, 0.2); color: var(--warning); }
.badge.needs-improvement { background: rgba(239, 71, 67, 0.2); color: var(--danger); }

.stat-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 15px; margin-bottom: 20px; }
.stat-item { background: var(--bg-color); padding: 15px; border-radius: var(--border-radius); text-align: center; border: 1px solid var(--border-color); }
.stat-label { display: block; font-size: 0.85rem; color: var(--text-muted); text-transform: uppercase; letter-spacing: 0.5px; }
.stat-value { display: block; font-size: 1.5rem; font-weight: bold; margin-top: 5px; }
.stat-value.highlight { color: var(--primary); }

/* Progress Bar */
.progress-section { margin-top: 20px; }
.progress-header { display: flex; justify-content: space-between; font-size: 0.9rem; margin-bottom: 8px; color: var(--text-muted); }
.progress-bar-bg { width: 100%; height: 8px; background: var(--bg-color); border-radius: 4px; overflow: hidden; }
.progress-bar-fill { height: 100%; background: var(--primary); border-radius: 4px; width: 0%; transition: width 1s ease-in-out; }

/* Insights List */
#insightsList li { margin-bottom: 10px; padding-left: 20px; position: relative; }
#insightsList li::before { content: '•'; position: absolute; left: 0; color: var(--primary); font-size: 1.2rem; line-height: 1; }
.insight-pos { color: var(--success); font-weight: bold; }
.insight-neg { color: var(--danger); font-weight: bold; }

/* Hacker-theme extras */
/* flicker effect for headings */
@keyframes flicker {
    0%,18%,22%,25%,53%,57%,100% { opacity: 1; }
    20%,24%,55% { opacity: 0.4; }
}
h1, h2, h3, .nav-brand a, .card h2, .card h3 { animation: flicker 3s infinite; }

/* shuffled text hover reveal */
.shuffle-title { cursor: pointer; display: inline-block; }

/* hidden reveal style copied from snippet */
.hidden { opacity: 0%; transition: opacity 0.3s; }
.hidden:hover { opacity: 100%; }

/* inputs and buttons neon glow */
input, button, .search-box input, .search-box button {
    background: #000;
    border: 1px solid var(--border-color);
    color: var(--text-main);
}
input:focus, .search-box input:focus {
    border-color: var(--primary);
    box-shadow: 0 0 10px var(--primary);
}
button:hover, .search-box button:hover {
    background: var(--border-color);
    border-color: var(--primary);
    box-shadow: 0 0 8px var(--primary);
}

/* table and cards border glow */
table, th, td, .card {
    border-color: var(--border-color);
}

/* Charts */
.charts-row { display: flex; gap: 20px; }
.half-width { flex: 1; }
@media (max-width: 900px) { .charts-row { flex-direction: column; } }
.chart-card { position: relative; width: 100%; }
canvas { max-width: 100%; }

/* Table */
.leaderboard-header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 20px; flex-wrap: wrap; gap: 10px; }
.leaderboard-header input { padding: 8px 12px; border-radius: var(--border-radius); border: 1px solid var(--border-color); background: var(--bg-color); color: var(--text-main); outline: none; }
.leaderboard-header input:focus { border-color: var(--primary); }
.table-responsive { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; text-align: left; }
th, td { padding: 12px 15px; border-bottom: 1px solid var(--border-color); }
th { background: var(--bg-color); font-weight: 600; cursor: pointer; white-space: nowrap; user-select: none; transition: background 0.2s; }
th:hover { background: var(--border-color); }
tr:hover { background: rgba(255, 255, 255, 0.02); }

/* Light mode removed — app uses dark hacker theme only */

/* course section specific styles */
.course-table input {
    width: 100%;
    padding: 4px 6px;
    background: var(--bg-color);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    color: var(--text-main);
    box-sizing: border-box;
    font-size: 0.9rem;
}

/* pointer inputs should be narrower */
.course-table .pointer-input {
    width: 60px;
}
#courseSection { margin-top: 40px; }

/* Theme toggle removed from CSS */