@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600&family=Outfit:wght@500;700;800&display=swap');

:root {
    --bg-color: #121212;
    --text-primary: #FFFFFF;
    --text-secondary: #94A3B8;
    --accent-color: #FFFFFF;
    --card-bg: rgba(25, 25, 25, 0.9);
    --card-border: rgba(255, 255, 255, 0.15);
    --input-bg: rgba(255, 255, 255, 0.05);
    --sidebar-w: 260px;
    --shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.3);
    --blur: blur(12px);
    --admin-color: #FF4757;
}

body.light-mode {
    --bg-color: #F8FAFC;
    --text-primary: #000000;
    --text-secondary: #64748B;
    --accent-color: #000000;
    --card-bg: rgba(245, 245, 245, 0.9);
    --card-border: rgba(0, 0, 0, 0.1);
    --input-bg: rgba(0, 0, 0, 0.05);
    --shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.1);
}

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

/* Custom Scrollbar for the entire system */
::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: var(--bg-color); }
::-webkit-scrollbar-thumb { background: rgba(148, 163, 184, 0.3); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: rgba(148, 163, 184, 0.6); }

body {
    font-family: 'Inter', sans-serif;
    background-color: var(--bg-color);
    color: var(--text-primary);
    transition: background-color 0.4s ease, color 0.4s ease;
    overflow-x: hidden;
}

h1, h2, h3, h4, h5, h6, .logo {
    font-family: 'Outfit', sans-serif;
}

/* Auth Page */
#auth-page { height: 100vh; display: flex; align-items: center; justify-content: center; position: relative; z-index: 10; padding: 20px; overflow: hidden; }
.auth-card {
    background: var(--card-bg); backdrop-filter: var(--blur); -webkit-backdrop-filter: var(--blur);
    border: 1px solid var(--card-border); padding: 30px; border-radius: 20px; width: 100%; max-width: 650px;
    box-shadow: var(--shadow); text-align: center;
}
.auth-card h1 { font-size: 2rem; margin-bottom: 20px; font-weight: 800; color: var(--text-primary); }
.auth-card p { margin-top: 15px; font-size: 0.9rem; color: var(--text-secondary); cursor: pointer; transition: color 0.3s; }
.auth-card p:hover { color: var(--text-primary); }

/* Form Elements */
input, textarea, select {
    width: 100%; padding: 12px; background: var(--input-bg); border: 1px solid var(--card-border);
    color: var(--text-primary); border-radius: 10px; font-family: 'Inter', sans-serif; font-size: 0.95rem;
    outline: none; transition: all 0.3s ease;
}
input:focus, textarea:focus, select:focus { border-color: var(--text-primary); }
input::placeholder, textarea::placeholder { color: var(--text-secondary); }
input[type="date"], input[type="time"] { color-scheme: dark; text-transform: uppercase; }
body.light-mode input[type="date"], body.light-mode input[type="time"] { color-scheme: light; }
select option { background: var(--bg-color); color: var(--text-primary); }

.btn-main {
    background: var(--text-primary); color: var(--bg-color); border: none; padding: 12px 20px; border-radius: 10px;
    font-weight: 600; font-family: 'Inter', sans-serif; font-size: 0.95rem; cursor: pointer; width: 100%;
    transition: transform 0.2s, box-shadow 0.2s; display: flex; align-items: center; justify-content: center; gap: 8px;
}
.btn-main:hover { transform: translateY(-2px); box-shadow: 0 8px 20px rgba(255, 255, 255, 0.1); }
body.light-mode .btn-main:hover { box-shadow: 0 8px 20px rgba(0, 0, 0, 0.1); }
.btn-main:active { transform: translateY(0); }

/* Navigation */
.top-nav {
    height: 65px; background: var(--card-bg); backdrop-filter: var(--blur); -webkit-backdrop-filter: var(--blur);
    border-bottom: 1px solid var(--card-border); display: flex; align-items: center; justify-content: space-between;
    padding: 0 25px; position: fixed; top: 0; width: 100%; z-index: 1000;
}
.logo { font-size: 1.4rem; font-weight: 800; letter-spacing: 1px; color: var(--text-primary); }
.menu-btn { cursor: pointer; font-size: 1.5rem; color: var(--text-primary); transition: 0.2s; display: none; }
.nav-icons { display: flex; gap: 15px; font-size: 1.2rem; }
.nav-icons span { cursor: pointer; transition: transform 0.2s; display: flex; align-items: center; justify-content: center; width: 36px; height: 36px; border-radius: 50%; background: var(--input-bg); }
.nav-icons span:hover { transform: scale(1.1); background: var(--card-border); }

/* Sidebar */
.sidebar {
    position: fixed; top: 65px; left: 0; width: var(--sidebar-w); height: calc(100vh - 65px);
    background: var(--card-bg); backdrop-filter: var(--blur); -webkit-backdrop-filter: var(--blur);
    border-right: 1px solid var(--card-border); transition: 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    padding: 20px 15px; z-index: 999; overflow-y: auto;
}
.user-info-side { display: flex; align-items: center; gap: 12px; padding-bottom: 15px; margin-bottom: 15px; border-bottom: 1px solid var(--card-border); }
.avatar { width: 40px; height: 40px; border-radius: 50%; background: var(--text-primary); display: flex; align-items: center; justify-content: center; font-size: 1.2rem; color: var(--bg-color); }
.user-info-side p { font-weight: 600; font-size: 1rem; }

.nav-item {
    padding: 12px 15px; margin-bottom: 4px; border-radius: 10px; cursor: pointer; transition: all 0.3s;
    color: var(--text-secondary); display: flex; align-items: center; gap: 12px; font-weight: 500; font-size: 0.9rem;
}
.nav-item i { font-size: 1.1rem; width: 20px; text-align: center; }
.nav-item:hover { background: var(--card-border); color: var(--text-primary); transform: translateX(5px); }
.nav-item.active-nav { background: var(--text-primary); color: var(--bg-color); }
.admin-link i { color: var(--admin-color); }

/* Content Area */
.content { padding: 80px 20px 20px calc(var(--sidebar-w) + 20px); max-width: 1400px; margin: 0 auto; min-height: 100vh; transition: 0.3s; }
.page { display: none; animation: fadeIn 0.4s ease forwards; opacity: 0; transform: translateY(10px); }
.page.active { display: block; }
@keyframes fadeIn { to { opacity: 1; transform: translateY(0); } }
.page h2 { font-size: 1.6rem; margin-bottom: 15px; font-weight: 700; color: var(--text-primary); }

/* Cards & Stats */
.card {
    background: var(--card-bg); backdrop-filter: var(--blur); -webkit-backdrop-filter: var(--blur);
    border: 1px solid var(--card-border); padding: 20px; border-radius: 16px; margin-bottom: 15px;
    box-shadow: var(--shadow); transition: transform 0.3s ease, box-shadow 0.3s ease;
}
.card h3 { margin-bottom: 15px; font-size: 1.15rem; display: flex; align-items: center; gap: 8px; color: var(--text-primary); }

.stats-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 15px; margin-bottom: 15px; }
.stat-card {
    background: var(--card-bg); backdrop-filter: var(--blur); border: 1px solid var(--card-border);
    padding: 20px; border-radius: 16px; display: flex; flex-direction: column; justify-content: center;
    box-shadow: var(--shadow); position: relative; overflow: hidden;
}
.stat-card::before { content: ''; position: absolute; top: 0; left: 0; width: 4px; height: 100%; background: var(--text-primary); }
.stat-card h3 { font-size: 0.95rem; color: var(--text-secondary); margin-bottom: 8px; display:flex; align-items:center; gap:8px; }
.stat-card p { font-size: 1.8rem; font-weight: 800; font-family: 'Outfit', sans-serif; color: var(--text-primary); }

/* Dashboard Carousel */
.carousel-container { display: flex; overflow-x: auto; gap: 15px; padding-bottom: 10px; scroll-snap-type: x mandatory; }
.carousel-card { min-width: 200px; background: var(--input-bg); border: 1px solid var(--card-border); padding: 15px; border-radius: 12px; scroll-snap-align: start; flex-shrink: 0; transition: transform 0.3s; }
.carousel-card:hover { transform: translateY(-5px); }

/* Timetable (Static Grid) */
.timetable-container { overflow-x: auto; padding-bottom: 10px; }
.timetable { display: grid; grid-template-columns: 100px repeat(5, minmax(120px, 1fr)); gap: 10px; min-width: 650px; }
.tt-header { font-weight: 700; text-align: center; padding: 10px; border-bottom: 2px solid var(--card-border); color: var(--text-secondary); font-size: 0.9rem; }
.tt-time { text-align: center; padding: 12px 5px; color: var(--text-secondary); border-right: 1px solid var(--card-border); display: flex; align-items: center; justify-content: center; font-size: 0.85rem; font-weight: 600; }
.tt-slot { padding: 12px; border-radius: 10px; text-align: center; font-weight: 600; font-size: 0.85rem; transition: transform 0.2s, box-shadow 0.2s; display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 5px; border: 1px solid var(--card-border); background: var(--input-bg); color: var(--text-primary); }
.tt-slot:hover { transform: translateY(-3px); box-shadow: 0 5px 15px rgba(0,0,0,0.1); }
.tt-slot small { font-size: 0.75rem; font-weight: 400; opacity: 0.8; }
.tt-slot.free { border: 1px dashed var(--card-border); color: var(--text-secondary); background: transparent; }

/* Exams Grid */
.exams-grid { display: grid; grid-template-columns: 1fr; gap: 15px; margin-top: 15px; }

/* Cafeteria Menu */
.cafe-menu { list-style: none; }
.cafe-menu li { padding: 10px 15px; border-bottom: 1px solid var(--card-border); display: flex; align-items: center; gap: 10px; font-size: 0.95rem;}
.cafe-menu li:last-child { border-bottom: none; }
.cafe-menu li i { color: var(--text-primary); font-size: 1.1rem; }

/* Dashboard Two Col */
.dash-two-col { display: grid; grid-template-columns: 1fr 1fr; gap: 15px; }

/* Table & Todos */
table { width: 100%; border-collapse: collapse; margin-top: 10px; }
th, td { padding: 12px; text-align: left; border-bottom: 1px solid var(--card-border); color: var(--text-primary); font-size: 0.95rem;}
th { font-weight: 600; color: var(--text-secondary); }
tr:hover td { background: var(--input-bg); }
.del-btn { background: rgba(255, 71, 87, 0.1); color: #FF4757; border: 1px solid rgba(255, 71, 87, 0.2); padding: 6px 12px; border-radius: 8px; cursor: pointer; transition: 0.2s; font-weight: 600; display:flex; align-items:center; gap:5px; font-size: 0.85rem;}
.del-btn:hover { background: #FF4757; color: #fff; }

.todo-input-group { display: flex; gap: 10px; margin-bottom: 20px; }
#todo-list { list-style: none; }
#todo-list li { display: flex; justify-content: space-between; align-items: center; padding: 12px 15px; background: var(--input-bg); border: 1px solid var(--card-border); margin-bottom: 8px; border-radius: 10px; transition: all 0.3s ease; }
#todo-list li:hover { border-color: var(--text-secondary); }
.todo-text { font-size: 0.95rem; display:flex; align-items:center; gap:10px; color: var(--text-primary); }
.todo-text.done { text-decoration: line-through; color: var(--text-secondary); }
.todo-actions { display: flex; gap: 8px; }
.icon-btn { background: none; border: none; font-size: 1.1rem; cursor: pointer; transition: 0.2s; color: var(--text-secondary); display:flex; align-items:center; justify-content: center;}
.icon-btn:hover { color: var(--text-primary); transform: scale(1.1); }
.icon-btn.delete:hover { color: var(--admin-color); }

/* FAQ Styles */
.faq-item { border-bottom: 1px solid var(--card-border); padding: 12px 0; }
.faq-item:last-child { border-bottom: none; }
.faq-q { cursor: pointer; display: flex; justify-content: space-between; align-items: center; font-size: 0.95rem; color: var(--text-primary); transition: color 0.3s; margin-bottom: 0 !important; font-weight: 600; }
.faq-q:hover { color: var(--text-secondary); }
.faq-q i { transition: transform 0.3s ease; }
.faq-a { max-height: 0; overflow: hidden; transition: max-height 0.3s ease, margin-top 0.3s ease; color: var(--text-secondary); line-height: 1.4; font-size: 0.85rem; }
.faq-item.active .faq-a { max-height: 200px; margin-top: 8px; }
.faq-item.active .faq-q i { transform: rotate(180deg); color: var(--text-primary); }

/* Profile Page */
.profile-card { background: var(--input-bg); padding: 25px; border-radius: 16px; border: 1px solid var(--card-border); margin-bottom: 15px; }

/* Responsive */
@media (max-width: 992px) {
    .sidebar { left: calc(-1 * var(--sidebar-w)); }
    .sidebar.active { left: 0; }
    .content { padding-left: 20px; }
    .menu-btn { display: block; }
    .dash-two-col { grid-template-columns: 1fr; }
}

@media (max-width: 768px) {
    .content { padding: 75px 15px 15px 15px; }
    .stats-grid { grid-template-columns: 1fr; }
    .todo-input-group { flex-direction: column; }
    .auth-card { margin: 15px; padding: 20px; }
    .auth-card .reg-grid { grid-template-columns: 1fr !important; }
    .auth-card .reg-grid input[type="password"] { grid-column: span 1 !important; }
}
.hidden { display: none !important; }