/* =========================================
   SABI OS v3.0: MASTER GLOBAL STYLES
   Theme: OLED Midnight / Neon Blue
========================================= */

:root {
    --sabi-blue: #3D8EFF;
    --sabi-blue-glow: rgba(61, 142, 255, 0.3);
    --sabi-green: #10B981;
    --sabi-red: #EF4444;
    --zinc-900: #0A0A0A;
    --zinc-800: #18181B;
    --zinc-700: #27272A;
    --zinc-400: #A1A1AA;
    --zinc-100: #FAFAFA;
}

* {
    margin: 0; padding: 0; box-sizing: border-box;
    font-family: 'Outfit', sans-serif;
    -webkit-tap-highlight-color: transparent;
}

body {
    background-color: #000000; /* Pure Black */
    color: var(--zinc-100);
    line-height: 1.6;
    overflow-x: hidden;
    min-height: 100vh;
    padding-bottom: 100px; /* Space for the Floating Dock */
}

/* --- 1. GLOBAL ANIMATIONS --- */
.page-transition-wrapper {
    animation: sabiPageEnter 0.5s cubic-bezier(0.215, 0.61, 0.355, 1) forwards;
    opacity: 0;
}

@keyframes sabiPageEnter {
    from { opacity: 0; transform: translateY(15px); }
    to { opacity: 1; transform: translateY(0); }
}

@keyframes activeFloat {
    0%, 100% { transform: translateY(-3px); }
    50% { transform: translateY(-6px); }
}

/* --- 2. HOME SCREEN (INDEX.HTML) STYLES --- */
.home-header { padding: 30px 20px; display: flex; justify-content: space-between; align-items: center; }
.main-logo { font-size: 24px; font-weight: 900; letter-spacing: -1px; }
.blue-text { color: var(--sabi-blue); }
.brand-tag { font-size: 10px; font-weight: 800; color: var(--zinc-400); display: block; text-transform: uppercase; }

.welcome-card { background: var(--zinc-900); border: 1px solid var(--zinc-700); border-radius: 20px; padding: 25px; margin: 0 20px 25px; }
.welcome-card h2 { font-size: 20px; margin-bottom: 8px; font-weight: 800; }
.welcome-card p { font-size: 14px; color: var(--zinc-400); }

.mode-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 15px; padding: 0 20px; margin-bottom: 30px; }
.mode-card { background: var(--zinc-900); border: 1px solid var(--zinc-700); border-radius: 16px; padding: 20px; text-align: center; transition: 0.3s; cursor: pointer; }
.mode-card.active { border-color: var(--sabi-blue); background: rgba(61, 142, 255, 0.05); }
.mode-icon { font-size: 24px; display: block; margin-bottom: 10px; }

.subject-section { padding: 0 20px; }
.section-head { display: flex; justify-content: space-between; margin-bottom: 15px; align-items: center; }
.count-tag { font-size: 12px; font-weight: 800; color: var(--sabi-blue); background: rgba(61, 142, 255, 0.1); padding: 4px 10px; border-radius: 20px; }
.subject-chips { display: flex; flex-wrap: wrap; gap: 10px; }
.chip { background: var(--zinc-800); border: 1px solid var(--zinc-700); padding: 10px 18px; border-radius: 30px; font-size: 13px; font-weight: 600; cursor: pointer; transition: 0.2s; }
.chip.active { background: var(--sabi-blue); border-color: var(--sabi-blue); color: white; }

.launch-btn { 
    display: block; width: calc(100% - 40px); margin: 30px 20px; padding: 18px; 
    background: var(--sabi-blue); border: none; border-radius: 16px; color: white; 
    font-weight: 900; font-size: 16px; box-shadow: 0 10px 20px var(--sabi-blue-glow); cursor: pointer;
}

/* --- 3. EXAM ROOM (TEST-ROOM.HTML) STYLES --- */
.exam-header { background: var(--zinc-900); display: flex; justify-content: space-between; align-items: center; padding: 15px 20px; border-bottom: 1px solid var(--zinc-700); position: sticky; top: 0; z-index: 100; }
.subject-tabs { display: flex; background: var(--zinc-900); padding: 0 20px; gap: 20px; overflow-x: auto; border-bottom: 1px solid var(--zinc-700); scrollbar-width: none; }
.sub-tab { padding: 15px 5px; font-weight: 700; font-size: 14px; color: var(--zinc-400); cursor: pointer; white-space: nowrap; border-bottom: 3px solid transparent; transition: 0.3s; }
.sub-tab.active { color: var(--sabi-blue); border-bottom: 3px solid var(--sabi-blue); }

.question-container { padding: 25px 20px; max-width: 800px; margin: 0 auto; }
#q-text-display { font-size: 18px; font-weight: 600; line-height: 1.5; margin-bottom: 25px; }

.option-card { background: var(--zinc-900); border: 2px solid var(--zinc-700); border-radius: 14px; padding: 16px; display: flex; align-items: center; gap: 15px; cursor: pointer; transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1); margin-bottom: 12px; }
.option-card.selected { border-color: var(--sabi-blue); background: rgba(61, 142, 255, 0.08); }
.option-card.correct { border-color: var(--sabi-green); background: rgba(16, 185, 129, 0.08); }
.option-card.wrong { border-color: var(--sabi-red); background: rgba(239, 68, 68, 0.08); }

.opt-circle { width: 34px; height: 34px; border-radius: 50%; background: var(--zinc-800); display: flex; justify-content: center; align-items: center; font-weight: 800; border: 1px solid var(--zinc-700); flex-shrink: 0; }
.option-card.selected .opt-circle { background: var(--sabi-blue); border-color: var(--sabi-blue); color: white; }

/* Question Grid Sheet */
.grid-bottom-sheet { position: fixed; bottom: 0; left: 0; width: 100%; background: var(--zinc-900); border-radius: 24px 24px 0 0; z-index: 1100; padding: 25px 20px; border-top: 1px solid var(--zinc-700); transition: transform 0.4s cubic-bezier(0.4, 0, 0.2, 1); box-shadow: 0 -10px 40px rgba(0,0,0,0.8); }
.grid-bottom-sheet.hidden { transform: translateY(100%); }
.grid-container { display: grid; grid-template-columns: repeat(auto-fill, minmax(45px, 1fr)); gap: 12px; max-height: 50vh; overflow-y: auto; padding-bottom: 20px; }
.q-bubble { width: 45px; height: 45px; border-radius: 50%; display: flex; justify-content: center; align-items: center; font-weight: 700; border: 2px solid var(--zinc-700); background: var(--zinc-800); color: var(--zinc-400); cursor: pointer; }
.q-bubble.answered { background: var(--sabi-blue); color: white; border-color: var(--sabi-blue); }
.q-bubble.active { border-color: var(--sabi-green); border-width: 3px; }

/* --- 4. ANALYTICS (RESULTS.HTML) STYLES --- */
.score-card { background: var(--zinc-900); border: 1px solid var(--zinc-700); border-radius: 20px; padding: 40px 20px; text-align: center; margin: 20px; }
.score-display { display: flex; justify-content: center; align-items: baseline; gap: 8px; margin: 15px 0; }
.score-number { font-size: 72px; font-weight: 900; line-height: 1; }
.score-max { font-size: 24px; font-weight: 700; color: var(--zinc-400); }
.badge-box { display: inline-flex; align-items: center; gap: 8px; padding: 10px 20px; border-radius: 30px; margin-bottom: 15px; border: 1px solid transparent; }
.stats-row { display: grid; grid-template-columns: 1fr 1fr; gap: 15px; padding: 0 20px; }
.stat-box { background: var(--zinc-900); border: 1px solid var(--zinc-700); border-radius: 16px; padding: 20px; text-align: center; }
.breakdown-grid { display: flex; flex-direction: column; gap: 12px; padding: 20px; }
.sub-card { background: var(--zinc-900); border: 1px solid var(--zinc-700); border-radius: 14px; padding: 18px; display: flex; justify-content: space-between; align-items: center; }

/* --- 5. THE NEON FLOATING DOCK (BOTTOM NAV) --- */
.app-bottom-nav {
    position: fixed; bottom: 25px; left: 50%; transform: translateX(-50%);
    width: 90%; max-width: 380px; background: rgba(10, 10, 10, 0.85);
    backdrop-filter: blur(15px); -webkit-backdrop-filter: blur(15px);
    border: 1px solid rgba(255, 255, 255, 0.1); border-radius: 24px;
    display: flex; padding: 8px; z-index: 1200; box-shadow: 0 15px 35px rgba(0, 0, 0, 0.8);
}

.nav-indicator {
    position: absolute; height: calc(100% - 16px); top: 8px;
    background: rgba(61, 142, 255, 0.15); border-radius: 18px;
    transition: all 0.5s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    box-shadow: 0 0 15px var(--sabi-blue-glow); z-index: 0;
}

.nav-item {
    position: relative; flex: 1; display: flex; flex-direction: column;
    align-items: center; text-decoration: none; color: #52525B;
    padding: 10px 0; z-index: 2; transition: color 0.4s ease;
}

.nav-item.active { color: var(--sabi-blue); }
.nav-svg { width: 22px; height: 22px; stroke: currentColor; transition: 0.3s; }
.nav-item.active .nav-svg { filter: drop-shadow(0 0 8px var(--sabi-blue)); transform: translateY(-3px); animation: activeFloat 3s ease-in-out infinite; }
.nav-label { font-size: 9px; font-weight: 800; text-transform: uppercase; margin-top: 5px; letter-spacing: 0.5px; }

/* --- 6. UTILITIES --- */
.hidden { display: none !important; }
.blue-text { color: var(--sabi-blue); }