/* ─── OBSERVATORY WORLD TIME ─── */
/* Design tokens */
:root {
    --void:        #080C14;
    --deep-navy:   #0D1B2A;
    --midnight:    #1A3A5C;
    --card-bg:     #0E1822;
    --card-border: #1C3350;
    --cyan:        #00D4FF;
    --cyan-dim:    #00A8CC;
    --violet:      #6B48FF;
    --amber:       #F5A623;
    --moon:        #E8ECF0;
    --muted:       #5A7A96;
    --danger:      #FF4B6E;

    --font-display: 'Space Grotesk', sans-serif;
    --font-mono:    'JetBrains Mono', monospace;

    --radius-card:  16px;
    --radius-sm:    8px;
    --glow-cyan:    0 0 20px rgba(0, 212, 255, 0.25), 0 0 60px rgba(0, 212, 255, 0.08);
    --glow-violet:  0 0 20px rgba(107, 72, 255, 0.3),  0 0 60px rgba(107, 72, 255, 0.1);
}

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

html {
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
}

body {
    background: var(--void);
    color: var(--moon);
    font-family: var(--font-display);
    min-height: 100vh;
    overflow-x: hidden;
    position: relative;
}

/* ─── STARFIELD CANVAS ─── */
#starfield {
    position: fixed;
    inset: 0;
    z-index: 0;
    pointer-events: none;
}

/* ─── HEADER ─── */
.site-header {
    position: relative;
    z-index: 10;
    padding: 2.5rem 2rem 0;
    text-align: center;
}

.header-inner {
    display: inline-flex;
    flex-direction: column;
    align-items: center;
    gap: 0.4rem;
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.logo-icon {
    width: 42px;
    height: 42px;
    animation: orbitSpin 12s linear infinite;
    filter: drop-shadow(0 0 8px rgba(0,212,255,0.6));
}

@keyframes orbitSpin {
    from { transform: rotate(0deg); }
    to   { transform: rotate(360deg); }
}

.logo-text {
    font-size: 2rem;
    font-weight: 700;
    letter-spacing: -0.03em;
    background: linear-gradient(135deg, var(--cyan) 0%, var(--violet) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.logo-sub {
    font-size: 0.75rem;
    font-family: var(--font-mono);
    letter-spacing: 0.25em;
    text-transform: uppercase;
    color: var(--muted);
}

/* ─── ADD CITY SECTION ─── */
.add-city-section {
    position: relative;
    z-index: 10;
    padding: 2rem 2rem 0;
}

.add-city-inner {
    max-width: 900px;
    margin: 0 auto;
}

.add-city-form {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
    align-items: flex-end;
    background: rgba(13,27,42,0.7);
    border: 1px solid var(--card-border);
    border-radius: var(--radius-card);
    padding: 1.25rem 1.5rem;
    backdrop-filter: blur(12px);
    box-shadow: inset 0 1px 0 rgba(255,255,255,0.04), var(--glow-violet);
}

.input-group {
    display: flex;
    flex-direction: column;
    gap: 0.35rem;
    flex: 1;
    min-width: 160px;
}

.input-group.tz-group {
    flex: 2;
    min-width: 220px;
}

.input-group--flag {
    flex: 0 0 90px;
    min-width: 90px;
}

.input-label {
    font-size: 0.65rem;
    font-family: var(--font-mono);
    letter-spacing: 0.15em;
    text-transform: uppercase;
    color: var(--muted);
}

.text-input {
    background: rgba(8,12,20,0.8);
    border: 1px solid var(--card-border);
    border-radius: var(--radius-sm);
    color: var(--moon);
    font-family: var(--font-display);
    font-size: 0.9rem;
    padding: 0.6rem 0.85rem;
    width: 100%;
    outline: none;
    transition: border-color 0.2s, box-shadow 0.2s;
}

.text-input::placeholder { color: var(--muted); }

.text-input:focus {
    border-color: var(--cyan-dim);
    box-shadow: 0 0 0 3px rgba(0,212,255,0.12);
}

.text-input.input-error {
    border-color: var(--danger);
    box-shadow: 0 0 0 3px rgba(255,75,110,0.15);
}

.flag-input {
    font-size: 1.4rem;
    text-align: center;
    padding: 0.35rem 0.5rem;
}

/* Timezone search */
.select-wrapper { position: relative; }

.tz-search-input { cursor: pointer; }

.tz-dropdown {
    display: none;
    position: absolute;
    top: calc(100% + 4px);
    left: 0; right: 0;
    background: #0D1B2A;
    border: 1px solid var(--midnight);
    border-radius: var(--radius-sm);
    max-height: 220px;
    overflow-y: auto;
    z-index: 100;
    box-shadow: 0 8px 32px rgba(0,0,0,0.6);
}

.tz-dropdown.open { display: block; }

.tz-dropdown::-webkit-scrollbar { width: 4px; }
.tz-dropdown::-webkit-scrollbar-track { background: transparent; }
.tz-dropdown::-webkit-scrollbar-thumb { background: var(--midnight); border-radius: 2px; }

.tz-option {
    padding: 0.5rem 0.85rem;
    cursor: pointer;
    transition: background 0.15s;
    border-bottom: 1px solid rgba(255,255,255,0.03);
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 0.5rem;
}

.tz-left {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    min-width: 0;
}

.tz-flag {
    font-size: 1.1rem;
    line-height: 1;
    flex-shrink: 0;
}

.tz-city {
    font-size: 0.85rem;
    font-family: var(--font-mono);
    color: var(--moon);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.tz-region {
    font-size: 0.65rem;
    font-family: var(--font-mono);
    color: var(--muted);
    white-space: nowrap;
    flex-shrink: 0;
    text-align: right;
}

.tz-option:hover, .tz-option.active {
    background: rgba(0,212,255,0.1);
}

.tz-option:hover .tz-city,
.tz-option.active .tz-city { color: var(--cyan); }

/* Add button */
.add-btn {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    background: linear-gradient(135deg, var(--cyan) 0%, var(--violet) 100%);
    border: none;
    border-radius: var(--radius-sm);
    color: var(--void);
    cursor: pointer;
    font-family: var(--font-display);
    font-size: 0.88rem;
    font-weight: 600;
    letter-spacing: 0.02em;
    padding: 0.65rem 1.4rem;
    white-space: nowrap;
    transition: opacity 0.2s, transform 0.15s, box-shadow 0.2s;
    align-self: flex-end;
    height: 40px;
}

.add-btn:hover {
    opacity: 0.9;
    transform: translateY(-1px);
    box-shadow: var(--glow-cyan);
}

.add-btn:active { transform: translateY(0); }

.add-btn-icon {
    font-size: 1.2rem;
    line-height: 1;
    font-weight: 300;
}

.add-hint {
    margin-top: 0.6rem;
    font-size: 0.7rem;
    font-family: var(--font-mono);
    color: var(--muted);
    letter-spacing: 0.05em;
    text-align: center;
}

/* ─── CLOCKS GRID ─── */
.clocks-grid {
    position: relative;
    z-index: 10;
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
    gap: 1.25rem;
    max-width: 1400px;
    margin: 2rem auto 6rem;
    padding: 0 2rem;
}

/* ─── CLOCK CARD ─── */
.clock-card {
    position: relative;
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: var(--radius-card);
    padding: 1.5rem;
    overflow: hidden;
    transition: transform 0.25s, box-shadow 0.25s, border-color 0.25s;
    animation: cardIn 0.4s cubic-bezier(0.22, 0.61, 0.36, 1) both;
}

@keyframes cardOut {
    to { opacity: 0; transform: scale(0.88) translateY(-12px); }
}

.card-removing {
    animation: cardOut 0.3s ease forwards !important;
}

/* Staggered entry delays (0–11) */
.card-delay-0  { animation-delay: 0.00s; }
.card-delay-1  { animation-delay: 0.04s; }
.card-delay-2  { animation-delay: 0.08s; }
.card-delay-3  { animation-delay: 0.12s; }
.card-delay-4  { animation-delay: 0.16s; }
.card-delay-5  { animation-delay: 0.20s; }
.card-delay-6  { animation-delay: 0.24s; }
.card-delay-7  { animation-delay: 0.28s; }
.card-delay-8  { animation-delay: 0.32s; }
.card-delay-9  { animation-delay: 0.36s; }
.card-delay-10 { animation-delay: 0.40s; }
.card-delay-11 { animation-delay: 0.44s; }


    from { opacity: 0; transform: translateY(20px) scale(0.96); }
    to   { opacity: 1; transform: translateY(0) scale(1); }
}

.clock-card:hover {
    transform: translateY(-4px);
    border-color: rgba(0,212,255,0.35);
    box-shadow: var(--glow-cyan);
}

.clock-card.is-night {
    border-color: rgba(107,72,255,0.25);
}

.clock-card.is-night:hover {
    border-color: rgba(107,72,255,0.5);
    box-shadow: var(--glow-violet);
}

/* Orbital ring SVG inside card */
.card-orbit {
    position: absolute;
    top: -30px;
    right: -30px;
    width: 120px;
    height: 120px;
    opacity: 0.12;
    pointer-events: none;
}

.card-orbit circle {
    fill: none;
    stroke: var(--cyan);
    stroke-width: 1;
    vector-effect: non-scaling-stroke;
}

.clock-card.is-night .card-orbit circle { stroke: var(--violet); }

/* Day/Night indicator strip */
.day-arc {
    position: absolute;
    top: 0; left: 0; right: 0;
    height: 3px;
    border-radius: var(--radius-card) var(--radius-card) 0 0;
    background: linear-gradient(90deg, var(--amber), #FFD580);
    opacity: 0;
    transition: opacity 0.5s;
}

.clock-card.is-day .day-arc { opacity: 1; }
.clock-card.is-night .day-arc {
    background: linear-gradient(90deg, var(--violet), #9B7FFF);
    opacity: 0.6;
}

/* Remove button */
.remove-btn {
    position: absolute;
    top: 0.75rem;
    right: 0.75rem;
    background: rgba(255,75,110,0.08);
    border: 1px solid rgba(255,75,110,0.2);
    border-radius: 50%;
    color: var(--danger);
    cursor: pointer;
    font-size: 0.85rem;
    width: 26px;
    height: 26px;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity 0.2s, background 0.2s;
    line-height: 1;
    z-index: 5;
}

.clock-card:hover .remove-btn { opacity: 1; }

.remove-btn:hover {
    background: rgba(255,75,110,0.2);
    border-color: var(--danger);
}

/* Card content */
.card-flag {
    font-size: 1.8rem;
    line-height: 1;
    margin-bottom: 0.6rem;
    display: block;
}

.card-city {
    font-size: 1.05rem;
    font-weight: 600;
    letter-spacing: -0.01em;
    color: var(--moon);
    line-height: 1.2;
    margin-bottom: 0.15rem;
}

.card-tz {
    font-size: 0.65rem;
    font-family: var(--font-mono);
    color: var(--muted);
    letter-spacing: 0.08em;
    margin-bottom: 1.1rem;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.card-time {
    font-family: var(--font-mono);
    font-size: 2.4rem;
    font-weight: 500;
    letter-spacing: -0.02em;
    color: var(--cyan);
    line-height: 1;
    margin-bottom: 0.3rem;
    transition: color 0.5s;
}

.clock-card.is-night .card-time { color: #9B7FFF; }

.card-time .seconds {
    font-size: 1.4rem;
    opacity: 0.55;
}

.card-ampm {
    font-size: 0.75rem;
    font-family: var(--font-mono);
    color: var(--muted);
    letter-spacing: 0.1em;
    margin-left: 0.15rem;
}

.card-date {
    font-size: 0.75rem;
    font-family: var(--font-mono);
    color: var(--muted);
    margin-top: 0.5rem;
    letter-spacing: 0.04em;
}

.card-offset {
    display: inline-block;
    margin-top: 0.8rem;
    font-size: 0.65rem;
    font-family: var(--font-mono);
    letter-spacing: 0.08em;
    color: var(--void);
    background: var(--cyan);
    border-radius: 4px;
    padding: 0.15rem 0.5rem;
    font-weight: 500;
}

.clock-card.is-night .card-offset { background: var(--violet); }

/* Day/Night badge */
.daynight-badge {
    position: absolute;
    bottom: 1.25rem;
    right: 1.25rem;
    font-size: 1rem;
    opacity: 0.7;
}

/* ─── UTC FOOTER BANNER ─── */
.utc-banner {
    position: fixed;
    bottom: 0; left: 0; right: 0;
    z-index: 50;
    background: rgba(8,12,20,0.92);
    border-top: 1px solid var(--card-border);
    backdrop-filter: blur(16px);
    padding: 0.6rem 2rem;
}

.utc-inner {
    max-width: 1400px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    gap: 0.75rem;
    flex-wrap: wrap;
    font-family: var(--font-mono);
    font-size: 0.78rem;
}

.utc-label {
    letter-spacing: 0.2em;
    color: var(--muted);
    text-transform: uppercase;
}

.utc-time {
    color: var(--cyan);
    font-size: 1rem;
    font-weight: 500;
    letter-spacing: 0.05em;
}

.utc-date { color: var(--moon); }
.utc-sep  { color: var(--muted); }
.utc-offset-label { color: var(--muted); }
.utc-offset { color: var(--amber); font-weight: 500; }

/* ─── RESPONSIVE ─── */
@media (max-width: 640px) {
    .site-header { padding: 1.5rem 1rem 0; }
    .logo-text { font-size: 1.5rem; }
    .add-city-section { padding: 1.25rem 1rem 0; }
    .add-city-form { padding: 1rem; }
    .input-group--flag { flex: 0 0 80px; min-width: 80px; }
    .clocks-grid {
        grid-template-columns: 1fr 1fr;
        gap: 0.85rem;
        padding: 0 1rem;
        margin: 1.5rem auto 5rem;
    }
    .card-time { font-size: 1.7rem; }
    .card-time .seconds { font-size: 1rem; }
}

@media (max-width: 420px) {
    .clocks-grid { grid-template-columns: 1fr; }
}

/* ─── SCROLLBAR ─── */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--void); }
::-webkit-scrollbar-thumb { background: var(--midnight); border-radius: 3px; }

/* ─── REDUCED MOTION ─── */
@media (prefers-reduced-motion: reduce) {
    .logo-icon { animation: none; }
    .clock-card { animation: none; }
    * { transition-duration: 0.01ms !important; }
}