/* ════════════════════════════════════════════════════════
   SkyCast — LAYOUT — header, search bar, quick nav, dashboard grid, footer
   Part 2 of 4 · Loaded from index.html in order:
   base.css → layout.css → components.css → responsive.css
   ════════════════════════════════════════════════════════ */

.top-header {
    position: sticky;
    top: 0;
    z-index: 500;
    background: rgba(6, 12, 24, 0.92);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--glass-border);
    padding: 10px 0;
    margin: 0 -20px;
    padding-left: 20px;
    padding-right: 20px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    transition: background 0.4s;
    flex-wrap: nowrap;   /* keep header on one line */
}

:root[data-theme="light"] .top-header {
    background: rgba(219, 234, 254, 0.95);
}

.header-left {
    display: flex;
    align-items: center;
    gap: 16px;
    flex-shrink: 0;
}

/* Brand */
.brand { display: flex; align-items: center; gap: 10px; flex-shrink: 0; }
.brand-logo { width: 34px; height: 34px; color: var(--text-primary); flex-shrink: 0; }
.brand-name {
    font-family: 'Outfit', sans-serif;
    font-size: 1.5rem;
    font-weight: 800;
    letter-spacing: -0.5px;
    color: var(--text-primary);
    white-space: nowrap;
}
.brand-accent { color: var(--accent); }

/* Header Greeting */
.header-greeting { display: flex; flex-direction: column; gap: 1px; }
.header-date { font-size: 0.72rem; color: var(--text-muted); font-family: 'JetBrains Mono', monospace; letter-spacing: 0.03em; }
.header-hello { font-size: 0.86rem; font-weight: 600; color: var(--text-secondary); }

/* Header Right */
.header-right {
    display: flex;
    align-items: center;
    gap: 10px;
    flex: 1;
    justify-content: flex-end;
    min-width: 0;
}

/* Search Bar */
.search-bar {
    display: flex;
    align-items: center;
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: 12px;
    padding: 7px 12px;
    gap: 8px;
    flex: 1;
    max-width: 360px;
    min-width: 0;
    transition: border-color 0.2s, box-shadow 0.2s;
}
.search-bar:focus-within {
    border-color: var(--accent);
    box-shadow: 0 0 0 3px var(--accent-glow);
}
.search-icon { color: var(--text-muted); font-size: 0.82rem; flex-shrink: 0; }
.search-bar input {
    background: transparent;
    border: none;
    color: var(--text-primary);
    font-size: 0.88rem;
    width: 100%;
    caret-color: var(--accent);
    min-width: 0;
}
.search-bar input::placeholder { color: var(--text-muted); }
.gps-btn {
    background: transparent;
    color: var(--text-muted);
    font-size: 0.9rem;
    padding: 2px;
    transition: color 0.2s, transform 0.2s;
    flex-shrink: 0;
}
.gps-btn:hover { color: var(--accent); transform: scale(1.15); }

/* Controls */
.header-controls {
    display: flex;
    align-items: center;
    gap: 6px;
    flex-shrink: 0;
}

.ctrl-btn {
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    color: var(--text-primary);
    width: 36px; height: 36px;
    border-radius: 10px;
    font-size: 0.82rem;
    font-weight: 700;
    display: flex; align-items: center; justify-content: center;
    transition: background 0.2s, color 0.2s, border-color 0.2s, transform 0.15s;
    flex-shrink: 0;
}
.ctrl-btn:hover { background: var(--accent); color: white; border-color: var(--accent); transform: scale(1.05); }
.unit-btn { font-family: 'JetBrains Mono', monospace; font-size: 0.78rem; }

/* Profile chip */
.profile-chip {
    display: flex;
    align-items: center;
    gap: 7px;
    padding: 6px 12px;
    background: rgba(37, 99, 235, 0.15);
    border: 1px solid rgba(59, 130, 246, 0.3);
    border-radius: 10px;
    color: var(--text-accent);
    font-size: 0.8rem;
    font-weight: 600;
    white-space: nowrap;
    transition: background 0.2s, transform 0.2s;
    text-decoration: none;
    flex-shrink: 0;
}
.profile-chip:hover { background: rgba(37, 99, 235, 0.28); transform: translateY(-1px); color: var(--accent-hover); }
.profile-arrow { font-size: 0.68rem; }


/* ══════════════════════════════════════════════════════════
   SECTION 7 — QUICK NAV  (from layout.css)
══════════════════════════════════════════════════════════ */

.quick-nav {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 10px 16px;
    flex-wrap: nowrap;   /* single line with scroll chips */
    overflow: hidden;
}

.city-chips {
    display: flex;
    gap: 8px;
    overflow-x: auto;
    scrollbar-width: none;
    flex: 1;
    min-width: 0;
}
.city-chips::-webkit-scrollbar { display: none; }

.city-chip {
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    color: var(--text-primary);
    padding: 5px 13px;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 500;
    white-space: nowrap;
    cursor: pointer;
    transition: background 0.2s, color 0.2s, border-color 0.2s, transform 0.15s;
}
.city-chip:hover { background: var(--accent); color: white; border-color: var(--accent); transform: translateY(-1px); }
.city-chip.active { background: var(--accent); color: white; border-color: var(--accent); }

.nav-selects { display: flex; gap: 8px; flex-shrink: 0; }

.styled-select {
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    color: var(--text-primary);
    padding: 6px 10px;
    border-radius: 10px;
    font-size: 0.8rem;
    cursor: pointer;
    transition: border-color 0.2s;
    max-width: 155px;
}
.styled-select:hover { border-color: var(--accent); }
.styled-select option { background: var(--bg-elevated); color: var(--text-primary); }


/* ══════════════════════════════════════════════════════════
   SECTION 8 — DASHBOARD GRID  (from layout.css)
══════════════════════════════════════════════════════════ */

.dashboard {
    display: grid;
    grid-template-columns: minmax(0, 1.5fr) minmax(0, 1fr) minmax(0, 1fr);
    grid-template-rows: auto auto;
    gap: 16px;
}

.hero-card    { grid-column: 1; grid-row: 1 / 3; }
.metrics-panel { grid-column: 2 / 4; grid-row: 1; }
.aqi-card     { grid-column: 2; grid-row: 2; }
.compare-card { grid-column: 3; grid-row: 2; }


/* ══════════════════════════════════════════════════════════
   SECTION 9 — FOOTER  (from layout.css)
══════════════════════════════════════════════════════════ */

.app-footer { padding: 22px 26px; }
.footer-inner { display: flex; align-items: center; justify-content: space-between; gap: 20px; flex-wrap: wrap; }
.footer-brand { display: flex; align-items: center; gap: 12px; }
.footer-logo { width: 30px; height: 30px; color: var(--text-secondary); }
.footer-title { font-family: 'Outfit', sans-serif; font-weight: 700; font-size: 1rem; }
.footer-sub { font-size: 0.74rem; color: var(--text-muted); }
.footer-info { font-size: 0.77rem; color: var(--text-secondary); line-height: 1.7; text-align: center; }
.footer-links { display: flex; gap: 14px; }
.footer-links a {
    font-size: 0.8rem; color: var(--text-secondary); font-weight: 600;
    display: flex; align-items: center; gap: 6px;
    padding: 5px 11px; border: 1px solid var(--glass-border);
    border-radius: 8px; transition: color 0.2s, border-color 0.2s;
}
.footer-links a:hover { color: var(--accent); border-color: var(--accent); }