:root {
    --bg: linear-gradient(135deg, #0f172a 0%, #2563eb 45%, #38bdf8 100%);
    --card: rgba(255, 255, 255, 0.92);
    --text: #0f172a;
    --muted: #64748b;
    --accent: #2563eb;
    --accent-dark: #1d4ed8;
    --shadow: 0 20px 45px rgba(15, 23, 42, 0.25);
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    min-height: 100vh;
    font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
    background: var(--bg);
    color: var(--text);
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 24px;
}

.app-shell {
    width: 100%;
    max-width: 520px;
}

.weather-card {
    background: var(--card);
    border-radius: 24px;
    padding: 32px;
    box-shadow: var(--shadow);
    backdrop-filter: blur(10px);
}

.header {
    margin-bottom: 24px;
}

.eyebrow {
    margin: 0 0 6px;
    color: var(--accent);
    font-size: 0.85rem;
    font-weight: 700;
    letter-spacing: 0.16em;
    text-transform: uppercase;
}

h1 {
    margin: 0;
    font-size: 2rem;
}

.subtitle {
    margin: 8px 0 0;
    color: var(--muted);
}

.search-box {
    display: flex;
    gap: 10px;
    margin-bottom: 20px;
}

.search-box input {
    flex: 1;
    padding: 13px 16px;
    border: 1px solid #dbeafe;
    border-radius: 999px;
    font-size: 1rem;
    outline: none;
    transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.search-box input:focus {
    border-color: var(--accent);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.15);
}

.search-box button {
    border: none;
    background: linear-gradient(135deg, var(--accent), var(--accent-dark));
    color: white;
    padding: 13px 20px;
    border-radius: 999px;
    font-weight: 600;
    cursor: pointer;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.search-box button:hover {
    transform: translateY(-1px);
    box-shadow: 0 10px 20px rgba(37, 99, 235, 0.25);
}

.result-box {
    min-height: 220px;
    border-radius: 18px;
    background: linear-gradient(145deg, #f8fbff, #eef6ff);
    padding: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    border: 1px solid #dbeafe;
}

.empty-state,
.loading-state,
.error-state {
    margin: 0;
    color: var(--muted);
    font-size: 1rem;
}

.weather-panel {
    width: 100%;
    text-align: left;
}

.weather-head {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 12px;
}

.weather-label {
    margin: 0 0 6px;
    color: var(--accent);
    font-size: 0.8rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.14em;
}

.weather-head h2 {
    margin: 0;
    font-size: 1.35rem;
}

.weather-icon {
    font-size: 2rem;
    background: rgba(37, 99, 235, 0.12);
    width: 54px;
    height: 54px;
    border-radius: 50%;
    display: flex;
    justify-content: center;
    align-items: center;
}

.temp {
    margin-top: 16px;
    font-size: 3rem;
    font-weight: 700;
}

.description {
    margin: 4px 0 0;
    color: var(--muted);
    font-size: 1rem;
}

.stats {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 12px;
    margin-top: 18px;
}

.stat {
    background: white;
    padding: 12px 14px;
    border-radius: 14px;
    border: 1px solid #e2e8f0;
}

.stat span {
    display: block;
    font-size: 0.8rem;
    color: var(--muted);
    margin-bottom: 4px;
}

.stat strong {
    font-size: 1rem;
}

@media (max-width: 480px) {
    .weather-card {
        padding: 24px;
    }

    .search-box {
        flex-direction: column;
    }

    .stats {
        grid-template-columns: 1fr;
    }
}