/* My Moving Speed - Premium Glassmorphism 2.0 CSS */
:root {
    --primary: #5856d6; /* Vibrant Blue-Indigo */
    --primary-alt: #ff3b30; /* Accent Red */
    --accent-gradient: linear-gradient(135deg, #5856d6 0%, #af52de 100%);
    
    --bg-light: #f5f5f7;
    --card-light: rgba(255, 255, 255, 0.72);
    --text-light: #1d1d1f;
    --text-dim-light: #6e6e73;
    
    --bg-dark: #000000;
    --card-dark: rgba(28, 28, 30, 0.72);
    --text-dark: #f5f5f7;
    --text-dim-dark: #86868b;
    
    --glass-blur: 20px;
    --border-radius: 28px;
    --transition: all 0.4s cubic-bezier(0.16, 1, 0.3, 1);
    --shadow-premium: 0 20px 40px rgba(0,0,0,0.1);
}

[data-theme="dark"] {
    --bg: var(--bg-dark);
    --card: var(--card-dark);
    --text: var(--text-dark);
    --text-dim: var(--text-dim-dark);
    --border: rgba(255, 255, 255, 0.08);
    --shadow: 0 30px 60px rgba(0,0,0,0.4);
}

[data-theme="light"] {
    --bg: var(--bg-light);
    --card: var(--card-light);
    --text: var(--text-light);
    --text-dim: var(--text-dim-light);
    --border: rgba(0, 0, 0, 0.04);
    --shadow: 0 20px 40px rgba(0,0,0,0.06);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, "SF Pro Text", sans-serif;
    -webkit-font-smoothing: antialiased;
}

body {
    background-color: var(--bg);
    color: var(--text);
    transition: background-color 0.5s ease;
    line-height: 1.5;
    overflow-x: hidden;
}

.container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 24px;
}

/* Header */
header {
    height: 72px;
    display: flex;
    align-items: center;
    position: sticky;
    top: 0;
    z-index: 1000;
    background: var(--card);
    backdrop-filter: blur(var(--glass-blur));
    border-bottom: 1px solid var(--border);
    transition: var(--transition);
}

.logo {
    display: flex;
    align-items: center;
    gap: 4px;
    font-size: 1.6rem;
    font-weight: 800;
    text-decoration: none;
    letter-spacing: -0.03em;
    color: var(--text);
}

.logo span.red { color: var(--primary-alt); }

.nav-links { display: flex; gap: 32px; flex: 1; justify-content: center; }
.nav-links a {
    text-decoration: none;
    color: var(--text-dim);
    font-weight: 600;
    font-size: 0.9rem;
    transition: var(--transition);
}
.nav-links a:hover { color: var(--text); }

.controls { display: flex; gap: 12px; }
.theme-toggle, .lang-select {
    background: var(--border);
    border: 1px solid var(--border);
    color: var(--text);
    padding: 8px 12px;
    border-radius: 14px;
    cursor: pointer;
    font-size: 0.85rem;
    font-weight: 600;
    transition: var(--transition);
}
.theme-toggle:hover { transform: scale(1.05); }

/* Hero */
.hero { padding: 80px 0; text-align: center; }
.hero h1 {
    font-size: clamp(2.5rem, 8vw, 4rem);
    font-weight: 800;
    letter-spacing: -0.04em;
    margin-bottom: 16px;
    background: linear-gradient(180deg, var(--text) 0%, var(--text-dim) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}
.hero .sub-heading {
    color: var(--text-dim);
    font-size: 1.15rem;
    max-width: 600px;
    margin: 0 auto 60px;
}

/* Tool Card */
.tool-card {
    background: var(--card);
    backdrop-filter: blur(30px);
    border: 1px solid var(--border);
    border-radius: 48px;
    padding: 60px 40px;
    max-width: 580px;
    margin: 0 auto;
    box-shadow: var(--shadow);
    transition: var(--transition);
    position: relative;
}

.tool-card::before {
    content: '';
    position: absolute;
    inset: 0;
    border-radius: 48px;
    padding: 2px;
    background: linear-gradient(135deg, rgba(255,255,255,0.2) 0%, rgba(255,255,255,0) 50%, rgba(255,255,255,0.1) 100%);
    -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
    -webkit-mask-composite: xor;
    mask-composite: exclude;
    pointer-events: none;
}

.tool-card.is-moving {
    border-color: rgba(88, 86, 214, 0.3);
    box-shadow: 0 0 80px rgba(88, 86, 214, 0.15), var(--shadow);
}

/* Modes Toggle */
.mode-toggle {
    display: inline-flex;
    background: var(--border);
    padding: 6px;
    border-radius: 20px;
    margin-bottom: 40px;
}

.btn-toggle {
    border: none;
    background: transparent;
    color: var(--text-dim);
    padding: 10px 24px;
    border-radius: 16px;
    font-weight: 700;
    font-size: 0.8rem;
    letter-spacing: 0.05em;
    cursor: pointer;
    transition: var(--transition);
}

.btn-toggle.active {
    background: var(--text);
    color: var(--bg);
    box-shadow: 0 4px 12px rgba(0,0,0,0.1);
}

/* Speed Display */
.speed-display { margin-bottom: 40px; }
.digital-speed {
    font-size: 9rem;
    font-weight: 800;
    letter-spacing: -0.05em;
    line-height: 0.9;
    font-variant-numeric: tabular-nums;
}
.unit-label {
    font-size: 1.4rem;
    font-weight: 700;
    color: var(--text-dim);
    text-transform: uppercase;
    letter-spacing: 0.1em;
}

/* Analog */
.analog-container {
    width: 100%;
    max-width: 380px;
    margin: 0 auto;
    position: relative;
    display: none;
}
.analog-dial { width: 100%; height: auto; overflow: visible; }
.dial-bg { fill: none; }
.dial-dot { fill: var(--text-dim); opacity: 0.2; }
.dial-dot.major { fill: var(--text); opacity: 0.6; }
.dial-text {
    font-size: 12px;
    font-weight: 700;
    fill: var(--text-dim);
    font-family: 'Inter', sans-serif;
}
.dial-text.red { fill: var(--primary-alt); font-size: 14px; }

.needle {
    stroke: var(--primary-alt);
    stroke-width: 6;
    stroke-linecap: round;
    transform-origin: 150px 150px;
    transition: transform 0.3s cubic-bezier(0.1, 0, 0.1, 1);
    filter: drop-shadow(0 4px 6px rgba(0,0,0,0.3));
}
.needle-center { fill: var(--text); stroke: var(--bg); stroke-width: 4; }

.analog-footer {
    position: absolute;
    bottom: 20px;
    left: 0;
    right: 0;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.analog-digital-overlay span {
    font-size: 3.5rem;
    font-weight: 800;
    letter-spacing: -0.03em;
}
.analog-digital-overlay small {
    display: block;
    font-weight: 800;
    letter-spacing: 0.1em;
    color: var(--text-dim);
}

/* Controls */
.unit-selector { display: flex; justify-content: center; gap: 24px; margin-bottom: 40px; }
.unit-btn {
    background: none;
    border: none;
    color: var(--text-dim);
    font-weight: 700;
    font-size: 0.9rem;
    cursor: pointer;
    padding-bottom: 4px;
    border-bottom: 2px solid transparent;
    transition: var(--transition);
}
.unit-btn.active { color: var(--primary); border-color: var(--primary); }

.btn-main {
    background: var(--text);
    color: var(--bg);
    width: 100%;
    max-width: 240px;
    padding: 20px;
    border-radius: 20px;
    border: none;
    font-size: 1.2rem;
    font-weight: 800;
    cursor: pointer;
    transition: var(--transition);
    box-shadow: 0 10px 20px rgba(0,0,0,0.1);
}
.btn-main:hover { transform: translateY(-2px); box-shadow: 0 15px 30px rgba(0,0,0,0.15); }
.btn-main.stop { background: var(--primary-alt); color: white; }

.status-info { margin-top: 24px; font-size: 0.85rem; color: var(--text-dim); font-weight: 600; }
.accuracy-indicator {
    display: inline-block;
    width: 8px;
    height: 8px;
    background: #ffcc00;
    border-radius: 50%;
    margin-right: 6px;
}
.accuracy-good { background: #34c759; box-shadow: 0 0 10px rgba(52, 199, 89, 0.4); }

/* Tools Grid */
.tools-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 32px;
    margin-top: 48px;
}
.tool-item-card {
    background: var(--card);
    border: 1px solid var(--border);
    padding: 40px;
    border-radius: 32px;
    text-decoration: none;
    color: inherit;
    transition: var(--transition);
}
.tool-item-card:hover {
    transform: translateY(-8px);
    border-color: var(--primary);
    box-shadow: var(--shadow);
}
.tool-icon-circle {
    font-size: 2.5rem;
    margin-bottom: 24px;
    display: inline-block;
}

/* Footer */
footer { padding: 60px 0; background: var(--bg-body); border-top: 1px solid var(--border); color: var(--text); }
.footer-links ul { list-style: none; display: flex; gap: 24px; justify-content: center; margin-bottom: 24px; flex-wrap: wrap; }
.footer-links a { color: var(--text); opacity: 0.6; text-decoration: none; font-weight: 500; font-size: 0.95rem; }
.footer-links a:hover { opacity: 1; color: var(--primary); }
.copyright { text-align: center; opacity: 0.5; font-size: 0.85rem; margin-top: 24px; }

/* Responsive */
@media (max-width: 768px) {
    .nav-links { display: none; }
    .hero { padding: 40px 0; }
    .digital-speed { font-size: 7rem; }
    .tool-card { padding: 40px 24px; border-radius: 32px; }
}