/* CSS Design System for Tarcin Robotic BMC */
:root {
    --primary: #00d2ff;
    --secondary: #3a7bd5;
    --accent: #7f00ff;
    --bg-dark: #05070a;
    --bg-card: rgba(15, 20, 30, 0.7);
    --text-white: #ffffff;
    --text-gray: #94a3b8;
    --glass: rgba(255, 255, 255, 0.03);
    --glass-border: rgba(255, 255, 255, 0.08);
    --transition: all 0.4s cubic-bezier(0.23, 1, 0.32, 1);
}

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

body {
    background-color: var(--bg-dark);
    color: var(--text-white);
    font-family: 'Outfit', sans-serif;
    overflow-x: hidden;
    line-height: 1.6;
}

/* Custom Scrollbar */
::-webkit-scrollbar { width: 8px; }
::-webkit-scrollbar-track { background: var(--bg-dark); }
::-webkit-scrollbar-thumb { 
    background: linear-gradient(var(--primary), var(--secondary));
    border-radius: 10px;
}

.app-container {
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

/* Header & Navigation */
header {
    padding: 1.5rem 5%;
    display: flex;
    justify-content: space-between;
    align-items: center;
    backdrop-filter: blur(20px);
    background: rgba(5, 7, 10, 0.8);
    position: sticky;
    top: 0;
    z-index: 1000;
    border-bottom: 1px solid var(--glass-border);
}

.logo {
    font-size: 1.5rem;
    font-weight: 800;
    letter-spacing: -0.5px;
    background: linear-gradient(to right, #fff, var(--primary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.nav-links {
    display: flex;
    gap: 2rem;
}

.nav-btn {
    background: none;
    border: none;
    color: var(--text-gray);
    font-weight: 600;
    cursor: pointer;
    font-size: 0.9rem;
    position: relative;
    padding: 0.5rem 0;
    transition: var(--transition);
}

.nav-btn.active {
    color: var(--primary);
}

.nav-btn::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--primary);
    transition: var(--transition);
}

.nav-btn.active::after {
    width: 100%;
}

/* Hero Section */
.hero {
    padding: 100px 5%;
    text-align: center;
    background: radial-gradient(circle at top right, rgba(0, 210, 255, 0.1), transparent 40%),
                radial-gradient(circle at bottom left, rgba(127, 0, 255, 0.1), transparent 40%);
    position: relative;
}

.hero h1 {
    font-size: clamp(2.5rem, 8vw, 5rem);
    font-weight: 800;
    line-height: 1.1;
    margin-bottom: 1.5rem;
    letter-spacing: -2px;
}

.hero p {
    color: var(--text-gray);
    font-size: 1.25rem;
    max-width: 700px;
    margin: 0 auto 3rem;
}

/* BMC Grid */
.bmc-view {
    padding: 0 5% 100px;
    display: grid;
    grid-template-columns: repeat(10, 1fr);
    grid-template-rows: repeat(2, auto);
    gap: 1.5rem;
}

.glass-card {
    background: var(--glass);
    border: 1px solid var(--glass-border);
    border-radius: 24px;
    padding: 2rem;
    backdrop-filter: blur(10px);
    transition: var(--transition);
}

.glass-card:hover {
    background: rgba(255, 255, 255, 0.05);
    border-color: var(--primary);
    transform: translateY(-5px);
}

.glass-card h3 {
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 2px;
    color: var(--primary);
    margin-bottom: 1.5rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

/* Specific Grid Layout for BMC */
.card-kp { grid-column: span 2; }
.card-ka { grid-column: span 2; }
.card-vp { grid-column: span 2; grid-row: span 2; border-color: rgba(0, 210, 255, 0.3); }
.card-cr { grid-column: span 2; }
.card-cs { grid-column: span 2; }
.card-kr { grid-column: span 2; }
.card-ch { grid-column: span 2; }
.card-ct { grid-column: span 5; }
.card-rs { grid-column: span 5; }

.item-list {
    list-style: none;
}

.item-list li {
    margin-bottom: 1rem;
    font-size: 0.95rem;
    color: var(--text-gray);
    display: flex;
    align-items: flex-start;
    gap: 0.75rem;
}

.item-list li i {
    color: var(--primary);
    margin-top: 0.2rem;
}

/* Curricula View */
.curricula-view {
    padding: 0 5% 100px;
    display: none;
}

.board-navigator {
    display: flex;
    justify-content: center;
    gap: 1rem;
    margin-bottom: 4rem;
}

.board-tab {
    padding: 1rem 2rem;
    border-radius: 100px;
    border: 1px solid var(--glass-border);
    background: var(--glass);
    color: var(--text-gray);
    cursor: pointer;
    font-weight: 700;
    transition: var(--transition);
}

.board-tab.active {
    background: var(--primary);
    color: var(--bg-dark);
    border-color: var(--primary);
}

.curriculum-container {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
    animation: slideUp 0.6s ease;
}

@keyframes slideUp {
    from { opacity: 0; transform: translateY(30px); }
    to { opacity: 1; transform: translateY(0); }
}

.level-card {
    background: var(--glass);
    border: 1px solid var(--glass-border);
    border-radius: 30px;
    padding: 3rem;
    text-align: center;
}

.level-icon {
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    border-radius: 20px;
    margin: 0 auto 2rem;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    color: var(--bg-dark);
}

.level-card h2 {
    margin-bottom: 1rem;
    font-size: 1.5rem;
}

.level-card p {
    color: var(--text-gray);
    margin-bottom: 2rem;
}

.module-box {
    text-align: left;
    background: rgba(0, 0, 0, 0.2);
    border-radius: 20px;
    padding: 1.5rem;
    margin-bottom: 1rem;
    border: 1px solid transparent;
    transition: var(--transition);
}

.module-box:hover {
    border-color: var(--glass-border);
    background: rgba(0, 0, 0, 0.4);
}

.module-box h4 {
    color: var(--primary);
    font-size: 0.9rem;
    margin-bottom: 0.5rem;
}

.module-box ul {
    list-style: none;
    font-size: 0.85rem;
    color: var(--text-gray);
}

/* Footer */
footer {
    padding: 4rem 5%;
    border-top: 1px solid var(--glass-border);
    display: flex;
    justify-content: space-between;
    align-items: center;
    color: var(--text-gray);
    font-size: 0.9rem;
}

/* Responsive */
@media (max-width: 1100px) {
    .bmc-view {
        grid-template-columns: repeat(2, 1fr);
    }
    .card-kp, .card-ka, .card-vp, .card-cr, .card-cs, .card-kr, .card-ch, .card-ct, .card-rs {
        grid-column: span 1;
        grid-row: span 1;
    }
    .curriculum-container {
        grid-template-columns: 1fr;
    }
}