:root {
    --bg: #0a0a0f;
    --surface: #111118;
    --surface-2: #1a1a24;
    --border: rgba(255, 255, 255, 0.07);
    --border-hover: rgba(255, 255, 255, 0.15);
    --text: #f0f0f8;
    --text-muted: #6b6b8a;
    --accent: #7c6aff;
    --accent-2: #ff6a9e;
    --accent-glow: rgba(124, 106, 255, 0.25);
    --radius: 16px;
    --font-display: "Inter", sans-serif;
    --font-body: "Inter", sans-serif;
}

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

body {
    font-family: var(--font-display);
    background-color: var(--bg);
    color: var(--text);
    min-height: 100vh;
    padding: 3rem 2rem;
    display: flex;
    justify-content: center;
    background-image:
        radial-gradient(ellipse 60% 40% at 20% 0%, rgba(124, 106, 255, 0.12) 0%, transparent 60%),
        radial-gradient(ellipse 40% 30% at 80% 100%, rgba(255, 106, 158, 0.08) 0%, transparent 60%);
}

.container {
    max-width: 960px;
    width: 100%;
}

header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 3rem;
}

.brand {
    display: flex;
    align-items: baseline;
    gap: 10px;
}

h1 {
    font-size: 2.25rem;
    font-weight: 800;
    letter-spacing: -0.04em;
    background: linear-gradient(135deg, #f0f0f8 0%, var(--accent) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.brand-tag {
    font-family: var(--font-body);
    font-size: 0.65rem;
    font-weight: 400;
    color: var(--accent);
    background: rgba(124, 106, 255, 0.12);
    border: 1px solid rgba(124, 106, 255, 0.3);
    padding: 3px 8px;
    border-radius: 20px;
    letter-spacing: 0.08em;
    text-transform: uppercase;
}

.toggle-group {
    display: flex;
    align-items: center;
    gap: 10px;
    background: var(--surface);
    border: 1px solid var(--border);
    padding: 6px 14px 6px 10px;
    border-radius: 40px;
}

.toggle-label {
    font-family: var(--font-body);
    font-size: 0.7rem;
    font-weight: 500;
    color: var(--text-muted);
    letter-spacing: 0.1em;
    text-transform: uppercase;
    transition: color 0.2s;
    user-select: none;
}

.toggle-label.active {
    color: var(--accent);
}

.switch {
    position: relative;
    display: inline-block;
    width: 44px;
    height: 24px;
    flex-shrink: 0;
}

.switch input {
    opacity: 0;
    width: 0;
    height: 0;
}

.slider {
    position: absolute;
    cursor: pointer;
    inset: 0;
    background: var(--surface-2);
    border: 1px solid var(--border-hover);
    border-radius: 34px;
    transition: 0.3s ease;
}

.slider::before {
    content: "";
    position: absolute;
    height: 16px;
    width: 16px;
    left: 3px;
    bottom: 3px;
    background: var(--text-muted);
    border-radius: 50%;
    transition: 0.3s ease;
}

input:checked+.slider {
    background: rgba(124, 106, 255, 0.2);
    border-color: rgba(124, 106, 255, 0.5);
}

input:checked+.slider::before {
    transform: translateX(20px);
    background: var(--accent);
    box-shadow: 0 0 10px var(--accent-glow);
}

/* Grid */
.timezone-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1.5rem;
}

/* Card */
.tz-card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 1.75rem;
    position: relative;
    overflow: hidden;
    transition: border-color 0.3s ease, box-shadow 0.3s ease, transform 0.25s ease;
    animation: fadeUp 0.5s ease both;
}

.card-header {
  margin-bottom: 20px;
}

.header-meta {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.header-meta h2 {
  margin: 0;
  font-size: 1rem;
  font-weight: 700;
  color: var(--text-dark);
}

.tz-id {
  font-family: var(--font-body);
  font-size: 0.75rem;
  color: var(--text-light);
  opacity: 0.8;
  letter-spacing: 0.01em;
  margin-top: -1rem;
}

.tz-card:nth-child(1) {
    animation-delay: 0.05s;
}

.tz-card:nth-child(2) {
    animation-delay: 0.12s;
}

.tz-card:nth-child(3) {
    animation-delay: 0.19s;
}

@keyframes fadeUp {
    from {
        opacity: 0;
        transform: translateY(18px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.tz-card::before {
    content: '';
    position: absolute;
    inset: 0;
    background: radial-gradient(ellipse 120% 80% at 50% -20%, rgba(124, 106, 255, 0.06) 0%, transparent 70%);
    pointer-events: none;
}

.tz-card:hover {
    border-color: rgba(124, 106, 255, 0.35);
    box-shadow: 0 0 0 1px rgba(124, 106, 255, 0.1), 0 16px 40px rgba(0, 0, 0, 0.4);
    transform: translateY(-3px);
}

.tz-card h2 {
    font-size: 0.95rem;
    font-weight: 600;
    letter-spacing: 0.01em;
    /* color: var(--text-muted); */
    margin-bottom: 1.5rem;
    display: flex;
    align-items: center;
    gap: 8px;
}

.tz-card h2::before {
    content: '';
    display: inline-block;
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--accent);
    box-shadow: 0 0 8px var(--accent-glow);
    flex-shrink: 0;
}

.input-row {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

input[type="date"],
select {
    font-family: var(--font-body);
    font-size: 0.9rem;
    font-weight: 400;
    color: var(--text);
    background: var(--surface-2);
    border: 1px solid var(--border);
    border-radius: 10px;
    padding: 0.7rem 0.9rem;
    outline: none;
    transition: border-color 0.2s, background 0.2s, box-shadow 0.2s;
    -webkit-appearance: none;
    appearance: none;
    cursor: pointer;
}

input[type="date"]:hover,
select:hover {
    border-color: var(--border-hover);
    background: #20202e;
}

input[type="date"]:focus,
select:focus {
    border-color: rgba(124, 106, 255, 0.6);
    background: #20202e;
    box-shadow: 0 0 0 3px rgba(124, 106, 255, 0.12);
}

/* Webkit date picker color */
input[type="date"]::-webkit-calendar-picker-indicator {
    filter: invert(0.6) sepia(1) saturate(3) hue-rotate(200deg);
    cursor: pointer;
    opacity: 0.6;
}

input[type="date"]::-webkit-calendar-picker-indicator:hover {
    opacity: 1;
}

.time-selectors {
    display: flex;
    gap: 6px;
    align-items: center;
}

.time-selectors select {
    flex: 1;
    text-align: center;
}

.separator {
    font-family: var(--font-body);
    font-weight: 500;
    font-size: 1.1rem;
    color: var(--text-muted);
    flex-shrink: 0;
}

/* Divider line between date and time */
.input-divider {
    height: 1px;
    background: var(--border);
    margin: 2px 0;
}

footer {
    margin-top: 3rem;
    text-align: center;
    font-family: var(--font-body);
    font-size: 0.7rem;
    /* color: var(--text-muted); */
    letter-spacing: 0.08em;
    opacity: 0.7;
}

@media (max-width: 600px) {
    body {
        padding: 1.5rem 1rem;
    }

    h1 {
        font-size: 1.75rem;
    }

    header {
        flex-direction: column;
        align-items: flex-start;
        gap: 1rem;
    }
}