/* ===== DESIGN SYSTEM ===== */
:root {
    /* Colors */
    --bg-primary: #0a0e1a;
    --bg-secondary: #111827;
    --bg-card: rgba(17, 24, 39, 0.8);
    --bg-glass: rgba(255, 255, 255, 0.04);
    --border-glass: rgba(255, 255, 255, 0.08);

    --text-primary: #f1f5f9;
    --text-secondary: #94a3b8;
    --text-muted: #64748b;

    --accent-green: #10b981;
    --accent-emerald: #059669;
    --accent-teal: #14b8a6;
    --accent-gold: #f59e0b;
    --accent-red: #ef4444;
    --accent-blue: #3b82f6;
    --accent-orange: #f97316;

    --gradient-primary: linear-gradient(135deg, #059669, #14b8a6);
    --gradient-hero: linear-gradient(160deg, #0a0e1a 0%, #162032 40%, #0f2922 100%);
    --gradient-gold: linear-gradient(135deg, #f59e0b, #d97706);

    /* Typography */
    --font-body: 'Inter', system-ui, sans-serif;
    --font-heading: 'Outfit', system-ui, sans-serif;

    /* Spacing */
    --section-py: 5rem;
    --card-padding: 2rem;
    --radius: 16px;
    --radius-sm: 10px;
    --radius-xs: 6px;

    /* Effects */
    --shadow-card: 0 8px 32px rgba(0,0,0,0.35);
    --shadow-glow-green: 0 0 40px rgba(16,185,129,0.12);
    --shadow-glow-gold: 0 0 40px rgba(245,158,11,0.12);
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ===== RESET & BASE ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: var(--font-body);
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4 { font-family: var(--font-heading); line-height: 1.2; }
a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
button { font-family: var(--font-body); cursor: pointer; border: none; }
input[type="number"] { font-family: var(--font-body); }

/* ===== NAV ===== */
.nav {
    position: fixed; top: 0; left: 0; right: 0; z-index: 100;
    display: flex; align-items: center; justify-content: space-between;
    padding: 1rem 2rem;
    background: rgba(10, 14, 26, 0.75);
    backdrop-filter: blur(16px);
    border-bottom: 1px solid var(--border-glass);
    transition: var(--transition);
}
.nav-logo {
    font-family: var(--font-heading);
    font-weight: 700; font-size: 1.25rem;
    background: var(--gradient-primary);
    -webkit-background-clip: text; -webkit-text-fill-color: transparent;
    background-clip: text;
}
.nav-links { display: flex; gap: 2rem; list-style: none; }
.nav-links a {
    font-size: 0.9rem; font-weight: 500;
    color: var(--text-secondary);
    transition: var(--transition);
    position: relative;
}
.nav-links a::after {
    content: ''; position: absolute; bottom: -4px; left: 0;
    width: 0; height: 2px;
    background: var(--gradient-primary);
    transition: width 0.3s ease;
}
.nav-links a:hover { color: var(--text-primary); }
.nav-links a:hover::after { width: 100%; }

/* ===== HERO ===== */
.hero {
    min-height: 100vh;
    display: flex; flex-direction: column;
    align-items: center; justify-content: center;
    text-align: center;
    padding: 6rem 2rem 4rem;
    background: var(--gradient-hero);
    position: relative;
    overflow: hidden;
}
.hero::before {
    content: '';
    position: absolute; inset: 0;
    background:
        radial-gradient(circle at 20% 50%, rgba(16,185,129,0.08) 0%, transparent 50%),
        radial-gradient(circle at 80% 30%, rgba(20,184,166,0.06) 0%, transparent 50%),
        radial-gradient(circle at 50% 80%, rgba(245,158,11,0.04) 0%, transparent 50%);
    pointer-events: none;
}
.hero-badge {
    display: inline-flex; align-items: center; gap: 0.5rem;
    padding: 0.4rem 1rem; margin-bottom: 1.5rem;
    border-radius: 50px;
    background: rgba(16,185,129,0.1);
    border: 1px solid rgba(16,185,129,0.25);
    font-size: 0.8rem; font-weight: 500;
    color: var(--accent-green);
    animation: fadeInUp 0.6s ease both;
}
.hero h1 {
    font-size: clamp(2.5rem, 6vw, 4.5rem);
    font-weight: 800;
    margin-bottom: 1rem;
    animation: fadeInUp 0.6s ease 0.1s both;
}
.hero h1 .highlight {
    background: var(--gradient-primary);
    -webkit-background-clip: text; -webkit-text-fill-color: transparent;
    background-clip: text;
}
.hero p {
    font-size: clamp(1rem, 2vw, 1.25rem);
    color: var(--text-secondary);
    max-width: 600px;
    margin-bottom: 2.5rem;
    animation: fadeInUp 0.6s ease 0.2s both;
}
.hero-buttons {
    display: flex; gap: 1rem; flex-wrap: wrap; justify-content: center;
    animation: fadeInUp 0.6s ease 0.3s both;
}
.btn {
    display: inline-flex; align-items: center; gap: 0.5rem;
    padding: 0.85rem 1.75rem;
    border-radius: 50px;
    font-weight: 600; font-size: 0.95rem;
    transition: var(--transition);
}
.btn-primary {
    background: var(--gradient-primary);
    color: #fff;
    box-shadow: 0 4px 20px rgba(5,150,105,0.3);
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 8px 30px rgba(5,150,105,0.4); }
.btn-secondary {
    background: var(--bg-glass);
    border: 1px solid var(--border-glass);
    color: var(--text-primary);
}
.btn-secondary:hover { background: rgba(255,255,255,0.08); transform: translateY(-2px); }

/* ===== SECTIONS ===== */
.section {
    padding: var(--section-py) 2rem;
    max-width: 1200px;
    margin: 0 auto;
}
.section-header {
    text-align: center;
    margin-bottom: 3rem;
}
.section-label {
    display: inline-flex; align-items: center; gap: 0.5rem;
    font-size: 0.8rem; font-weight: 600; text-transform: uppercase;
    letter-spacing: 0.1em;
    margin-bottom: 0.75rem;
}
.section-label.green { color: var(--accent-green); }
.section-label.gold { color: var(--accent-gold); }
.section-header h2 {
    font-size: clamp(1.8rem, 4vw, 2.5rem);
    font-weight: 700;
    margin-bottom: 0.75rem;
}
.section-header p {
    color: var(--text-secondary);
    max-width: 650px;
    margin: 0 auto;
    font-size: 1.05rem;
}

/* ===== GLASS CARD ===== */
.card {
    background: var(--bg-card);
    border: 1px solid var(--border-glass);
    border-radius: var(--radius);
    padding: var(--card-padding);
    box-shadow: var(--shadow-card);
    backdrop-filter: blur(8px);
}

/* ===== DLS MODULE ===== */
.dls-layout {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
}
.dls-controls { display: flex; flex-direction: column; gap: 1.5rem; }

.control-group label {
    display: block; font-size: 0.85rem; font-weight: 500;
    color: var(--text-secondary); margin-bottom: 0.5rem;
}
.slider-row {
    display: flex; align-items: center; gap: 1rem;
}
.slider-row input[type="range"] { flex: 1; }
.slider-value {
    min-width: 50px; text-align: center;
    font-weight: 700; font-size: 1.1rem;
    color: var(--accent-green);
    font-family: var(--font-heading);
}
.score-input {
    width: 100%;
    padding: 0.75rem 1rem;
    background: var(--bg-glass);
    border: 1px solid var(--border-glass);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    font-size: 1rem;
    transition: var(--transition);
}
.score-input:focus {
    outline: none;
    border-color: var(--accent-green);
    box-shadow: 0 0 0 3px rgba(16,185,129,0.15);
}

/* Range slider styling */
input[type="range"] {
    -webkit-appearance: none; appearance: none;
    height: 6px; border-radius: 3px;
    background: rgba(255,255,255,0.1);
    outline: none;
}
input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none; appearance: none;
    width: 20px; height: 20px;
    border-radius: 50%;
    background: var(--accent-green);
    cursor: pointer;
    box-shadow: 0 0 10px rgba(16,185,129,0.4);
    transition: var(--transition);
}
input[type="range"]::-webkit-slider-thumb:hover {
    transform: scale(1.2);
    box-shadow: 0 0 18px rgba(16,185,129,0.6);
}
input[type="range"]::-moz-range-thumb {
    width: 20px; height: 20px;
    border-radius: 50%; border: none;
    background: var(--accent-green);
    cursor: pointer;
    box-shadow: 0 0 10px rgba(16,185,129,0.4);
}

/* DLS Result Display */
.dls-result {
    text-align: center;
    padding: 1.5rem;
    background: linear-gradient(135deg, rgba(5,150,105,0.1), rgba(20,184,166,0.05));
    border: 1px solid rgba(16,185,129,0.2);
    border-radius: var(--radius);
}
.dls-result .label { font-size: 0.8rem; color: var(--text-muted); text-transform: uppercase; letter-spacing: 0.08em; margin-bottom: 0.25rem; }
.dls-result .target {
    font-family: var(--font-heading);
    font-size: 3rem; font-weight: 800;
    background: var(--gradient-primary);
    -webkit-background-clip: text; -webkit-text-fill-color: transparent;
    background-clip: text;
    line-height: 1;
}
.dls-result .sub {
    font-size: 0.9rem; color: var(--text-secondary);
    margin-top: 0.25rem;
}

/* Resource Gauge */
.gauge-container {
    margin-top: 1rem;
}
.gauge-bar-track {
    width: 100%; height: 12px;
    background: rgba(255,255,255,0.06);
    border-radius: 6px;
    overflow: hidden;
    position: relative;
}
.gauge-bar-fill {
    height: 100%;
    border-radius: 6px;
    background: var(--gradient-primary);
    transition: width 0.5s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
}
.gauge-bar-fill::after {
    content: '';
    position: absolute; right: 0; top: 0; bottom: 0; width: 20px;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.3));
    border-radius: 0 6px 6px 0;
}
.gauge-label {
    display: flex; justify-content: space-between;
    font-size: 0.8rem; color: var(--text-muted);
    margin-top: 0.4rem;
}

/* DLS Heatmap */
.heatmap-wrapper {
    margin-top: 2.5rem;
}
.heatmap-wrapper h3 {
    font-size: 1.1rem; font-weight: 600;
    margin-bottom: 1rem;
    color: var(--text-secondary);
}
.heatmap-scroll {
    overflow-x: auto;
    padding-bottom: 0.5rem;
}
.heatmap-table {
    border-collapse: separate;
    border-spacing: 3px;
    width: 100%;
    min-width: 700px;
}
.heatmap-table th {
    font-size: 0.7rem; font-weight: 600;
    color: var(--text-muted);
    padding: 0.4rem;
    text-align: center;
    white-space: nowrap;
}
.heatmap-table td {
    text-align: center;
    padding: 0.4rem 0.3rem;
    font-size: 0.72rem;
    font-weight: 500;
    border-radius: var(--radius-xs);
    transition: var(--transition);
    cursor: default;
    position: relative;
}
.heatmap-table td.active {
    outline: 2px solid #fff;
    outline-offset: 1px;
    z-index: 2;
    font-weight: 700;
    transform: scale(1.15);
}
.heatmap-table .row-header {
    background: transparent !important;
    color: var(--text-muted) !important;
    font-weight: 600;
    font-size: 0.7rem;
}

/* ===== LBW MODULE ===== */
.lbw-layout {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
    align-items: start;
}
.lbw-pitch-container {
    position: relative;
}
.pitch-instructions {
    text-align: center;
    margin-bottom: 1rem;
}
.step-indicator {
    display: inline-flex; align-items: center; gap: 0.5rem;
    padding: 0.5rem 1rem;
    border-radius: 50px;
    font-size: 0.85rem; font-weight: 500;
    background: rgba(245,158,11,0.1);
    border: 1px solid rgba(245,158,11,0.25);
    color: var(--accent-gold);
    transition: var(--transition);
}
.pitch-svg-wrap {
    position: relative;
    border-radius: var(--radius);
    overflow: hidden;
    box-shadow: var(--shadow-card);
    border: 1px solid var(--border-glass);
    cursor: crosshair;
}
.pitch-svg-wrap svg {
    display: block;
    width: 100%;
    height: auto;
}

/* LBW Controls */
.lbw-controls { display: flex; flex-direction: column; gap: 1.25rem; }

.toggle-group {
    display: flex; align-items: center; justify-content: space-between;
    padding: 0.75rem 1rem;
    background: var(--bg-glass);
    border: 1px solid var(--border-glass);
    border-radius: var(--radius-sm);
}
.toggle-group .toggle-label {
    font-size: 0.9rem; color: var(--text-secondary);
}
.toggle-switch {
    position: relative; width: 48px; height: 26px;
    background: rgba(255,255,255,0.1);
    border-radius: 13px;
    cursor: pointer;
    transition: var(--transition);
}
.toggle-switch.active {
    background: var(--accent-green);
}
.toggle-switch::after {
    content: '';
    position: absolute; top: 3px; left: 3px;
    width: 20px; height: 20px;
    background: #fff;
    border-radius: 50%;
    transition: var(--transition);
}
.toggle-switch.active::after {
    left: 25px;
}

/* LBW Verdict */
.verdict-panel {
    padding: 1.5rem;
    border-radius: var(--radius);
    text-align: center;
    transition: var(--transition);
    min-height: 120px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
}
.verdict-panel.out {
    background: linear-gradient(135deg, rgba(239,68,68,0.12), rgba(239,68,68,0.04));
    border: 1px solid rgba(239,68,68,0.3);
}
.verdict-panel.notout {
    background: linear-gradient(135deg, rgba(16,185,129,0.12), rgba(16,185,129,0.04));
    border: 1px solid rgba(16,185,129,0.3);
}
.verdict-panel.umpires-call {
    background: linear-gradient(135deg, rgba(245,158,11,0.12), rgba(245,158,11,0.04));
    border: 1px solid rgba(245,158,11,0.3);
}
.verdict-panel.waiting {
    background: var(--bg-glass);
    border: 1px solid var(--border-glass);
}
.verdict-decision {
    font-family: var(--font-heading);
    font-size: 1.8rem; font-weight: 800;
    margin-bottom: 0.5rem;
}
.verdict-decision.out { color: var(--accent-red); }
.verdict-decision.notout { color: var(--accent-green); }
.verdict-decision.umpires-call { color: var(--accent-gold); }

/* LBW Explanation Steps */
.explanation-steps {
    text-align: left;
    margin-top: 1rem;
}
.explanation-step {
    display: flex; align-items: flex-start; gap: 0.6rem;
    padding: 0.5rem 0;
    font-size: 0.85rem;
    color: var(--text-secondary);
    border-bottom: 1px solid rgba(255,255,255,0.04);
}
.explanation-step:last-child { border-bottom: none; }
.step-icon {
    flex-shrink: 0;
    width: 22px; height: 22px;
    border-radius: 50%;
    display: flex; align-items: center; justify-content: center;
    font-size: 0.7rem;
    margin-top: 1px;
}
.step-icon.pass { background: rgba(16,185,129,0.15); color: var(--accent-green); }
.step-icon.fail { background: rgba(239,68,68,0.15); color: var(--accent-red); }
.step-icon.warn { background: rgba(245,158,11,0.15); color: var(--accent-gold); }

/* Preset Scenarios */
.presets {
    display: flex; flex-wrap: wrap; gap: 0.5rem;
    margin-top: 0.25rem;
}
.preset-btn {
    padding: 0.45rem 0.9rem;
    border-radius: 50px;
    font-size: 0.78rem; font-weight: 500;
    background: var(--bg-glass);
    border: 1px solid var(--border-glass);
    color: var(--text-secondary);
    transition: var(--transition);
}
.preset-btn:hover {
    background: rgba(245,158,11,0.1);
    border-color: rgba(245,158,11,0.3);
    color: var(--accent-gold);
}

.btn-reset {
    width: 100%;
    padding: 0.75rem;
    border-radius: var(--radius-sm);
    font-weight: 600; font-size: 0.9rem;
    background: rgba(239,68,68,0.1);
    border: 1px solid rgba(239,68,68,0.2);
    color: var(--accent-red);
    transition: var(--transition);
}
.btn-reset:hover {
    background: rgba(239,68,68,0.18);
}

/* ===== FOOTER ===== */
.footer {
    text-align: center;
    padding: 3rem 2rem;
    border-top: 1px solid var(--border-glass);
    color: var(--text-muted);
    font-size: 0.85rem;
}
.footer a { color: var(--accent-green); }
.footer a:hover { text-decoration: underline; }

/* ===== ANIMATIONS ===== */
@keyframes fadeInUp {
    from { opacity: 0; transform: translateY(24px); }
    to { opacity: 1; transform: translateY(0); }
}
@keyframes pulse-glow {
    0%, 100% { box-shadow: 0 0 15px rgba(16,185,129,0.2); }
    50% { box-shadow: 0 0 30px rgba(16,185,129,0.4); }
}
.animate-in {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}
.animate-in.visible {
    opacity: 1;
    transform: translateY(0);
}

/* ===== RESPONSIVE ===== */
@media (max-width: 900px) {
    .dls-layout, .lbw-layout {
        grid-template-columns: 1fr;
    }
    .nav-links { gap: 1rem; }
}
@media (max-width: 600px) {
    .nav { padding: 0.75rem 1rem; }
    .nav-links { gap: 0.75rem; }
    .nav-links a { font-size: 0.8rem; }
    .section { padding: 3rem 1rem; }
    .card { padding: 1.25rem; }
    .hero { padding: 5rem 1rem 3rem; }
    .dls-result .target { font-size: 2.2rem; }
}