/* ============================================
   iOS Weather App - Styles
   Modern glassmorphism design with smooth animations
   ============================================ */

:root {
    --bg-primary: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --bg-dark: linear-gradient(135deg, #1a1a2e 0%, #16213e 100%);
    --text-primary: white;
    --text-secondary: rgba(255, 255, 255, 0.8);
    --text-tertiary: rgba(255, 255, 255, 0.7);
    --glass-bg: rgba(255, 255, 255, 0.1);
    --glass-border: rgba(255, 255, 255, 0.2);
    --card-bg: rgba(255, 255, 255, 0.08);
}

body.dark-mode {
    --bg-primary: linear-gradient(135deg, #1a1a2e 0%, #16213e 100%);
    --bg-dark: linear-gradient(135deg, #0f0f1e 0%, #1a0f2e 100%);
    --glass-bg: rgba(255, 255, 255, 0.05);
    --glass-border: rgba(255, 255, 255, 0.1);
    --card-bg: rgba(255, 255, 255, 0.03);
}

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

html, body {
    width: 100%;
    overflow-x: hidden;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Helvetica Neue', sans-serif;
    background: var(--bg-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    padding: 16px;
    transition: background 0.3s ease;
    overflow-y: auto;
}

/* ============================================
   Main Container & Background
   ============================================ */

.container {
    width: 100%;
    max-width: 500px;
    position: relative;
    perspective: 1000px;
}

.background-gradient {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--bg-primary);
    z-index: -1;
    transition: background 0.3s ease;
}

/* ============================================
   Weather Card - Glassmorphism Effect
   ============================================ */

.weather-card {
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 32px;
    padding: 32px 24px;
    box-shadow: 
        0 8px 32px rgba(0, 0, 0, 0.1),
        inset 0 1px 1px rgba(255, 255, 255, 0.3);
    animation: slideInUp 0.6s ease-out;
    background: var(--glass-bg);
    border-color: var(--glass-border);
    transition: all 0.3s ease;
}

@keyframes slideInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ============================================
   Card Header
   ============================================ */

.card-header {
    margin-bottom: 28px;
}

.header-top {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 16px;
}

.card-header h1 {
    color: white;
    font-size: 28px;
    font-weight: 700;
    letter-spacing: -0.5px;
}

.header-controls {
    display: flex;
    gap: 8px;
}

.geo-btn, .theme-btn {
    width: 40px;
    height: 40px;
    border: none;
    border-radius: 10px;
    background: rgba(255, 255, 255, 0.15);
    color: white;
    font-size: 18px;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    backdrop-filter: blur(10px);
}

.geo-btn:hover, .theme-btn:hover {
    background: rgba(255, 255, 255, 0.25);
    transform: scale(1.05);
}

.geo-btn:active, .theme-btn:active {
    transform: scale(0.95);
}

/* ============================================
   Search Section
   ============================================ */

.search-section {
    margin-bottom: 32px;
}

.search-wrapper {
    display: flex;
    gap: 8px;
    margin-bottom: 8px;
}

.city-input {
    flex: 1;
    padding: 12px 16px;
    border: none;
    border-radius: 12px;
    background: rgba(255, 255, 255, 0.15);
    color: white;
    font-size: 16px;
    font-family: inherit;
    transition: all 0.3s ease;
    backdrop-filter: blur(10px);
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
}

.city-input::placeholder {
    color: rgba(255, 255, 255, 0.6);
}

.city-input:focus {
    outline: none;
    background: rgba(255, 255, 255, 0.25);
    box-shadow: 0 0 0 2px rgba(255, 255, 255, 0.2);
}

.search-btn {
    width: 44px;
    height: 44px;
    border: none;
    border-radius: 12px;
    background: rgba(255, 255, 255, 0.2);
    color: white;
    font-size: 18px;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    backdrop-filter: blur(10px);
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
}

.search-btn:hover {
    background: rgba(255, 255, 255, 0.3);
    transform: scale(1.05);
}

.search-btn:active {
    transform: scale(0.95);
}

.search-icon {
    display: inline-block;
}

/* ============================================
   Error Message
   ============================================ */

.error-message {
    color: #ff6b6b;
    font-size: 13px;
    padding: 0 4px;
    min-height: 20px;
    animation: fadeIn 0.3s ease;
}

@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

/* ============================================
   Loading Spinner
   ============================================ */

.loading-spinner {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 48px 24px;
    animation: fadeIn 0.3s ease;
}

.loading-spinner.hidden {
    display: none;
}

.spinner {
    width: 44px;
    height: 44px;
    border: 3px solid rgba(255, 255, 255, 0.2);
    border-top-color: white;
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin-bottom: 16px;
}

@keyframes spin {
    to {
        transform: rotate(360deg);
    }
}

.loading-spinner p {
    color: rgba(255, 255, 255, 0.8);
    font-size: 14px;
    font-weight: 500;
}

/* ============================================
   Empty State
   ============================================ */

.empty-state {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 48px 24px;
    text-align: center;
    animation: fadeIn 0.3s ease;
}

.empty-state.hidden {
    display: none;
}

.empty-icon {
    font-size: 48px;
    margin-bottom: 16px;
}

.empty-state p {
    color: rgba(255, 255, 255, 0.7);
    font-size: 14px;
    line-height: 1.5;
}

/* ============================================
   Weather Display Section
   ============================================ */

.weather-display {
    animation: fadeIn 0.3s ease;
}

.weather-display.hidden {
    display: none;
}

/* City name and condition */
.city-name-section {
    text-align: center;
    margin-bottom: 24px;
}

.city-name {
    color: white;
    font-size: 24px;
    font-weight: 600;
    margin-bottom: 4px;
    letter-spacing: -0.3px;
}

.weather-condition {
    color: rgba(255, 255, 255, 0.8);
    font-size: 14px;
    font-weight: 500;
    text-transform: capitalize;
}

/* ============================================
   Temperature Section
   ============================================ */

.temperature-section {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 16px;
    margin-bottom: 32px;
    padding: 24px;
    background: rgba(255, 255, 255, 0.08);
    border-radius: 20px;
    backdrop-filter: blur(10px);
    animation: scaleIn 0.4s ease-out;
}

@keyframes scaleIn {
    from {
        opacity: 0;
        transform: scale(0.95);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}

.weather-icon {
    width: 64px;
    height: 64px;
    filter: drop-shadow(0 2px 8px rgba(0, 0, 0, 0.1));
}

.temperature {
    font-size: 48px;
    font-weight: 700;
    color: white;
    letter-spacing: -1px;
    line-height: 1;
}

/* ============================================
   Info Grid
   ============================================ */

.info-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
    margin-top: 24px;
}

.info-card {
    background: rgba(255, 255, 255, 0.08);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 16px;
    padding: 16px;
    display: flex;
    align-items: center;
    gap: 12px;
    transition: all 0.3s ease;
    animation: fadeInUp 0.4s ease-out backwards;
}

.info-card:nth-child(1) { animation-delay: 0.1s; }
.info-card:nth-child(2) { animation-delay: 0.15s; }
.info-card:nth-child(3) { animation-delay: 0.2s; }
.info-card:nth-child(4) { animation-delay: 0.25s; }

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(12px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.info-card:hover {
    background: rgba(255, 255, 255, 0.12);
    transform: translateY(-2px);
}

.info-icon {
    font-size: 24px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.info-content {
    flex: 1;
}

.info-label {
    color: rgba(255, 255, 255, 0.7);
    font-size: 12px;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 4px;
}

.info-value {
    color: white;
    font-size: 14px;
    font-weight: 600;
}

/* ============================================
   Search History & Favorites
   ============================================ */

.history-section, .favorites-section {
    margin: 24px 0;
    padding: 16px;
    background: var(--card-bg);
    border: 1px solid var(--glass-border);
    border-radius: 16px;
    backdrop-filter: blur(10px);
    animation: fadeIn 0.3s ease;
}

.history-section.hidden, .favorites-section.hidden {
    display: none;
}

.history-label, .favorites-label {
    color: var(--text-tertiary);
    font-size: 12px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 12px;
    display: block;
}

.history-container, .favorites-container {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.history-btn, .favorite-city-btn {
    padding: 8px 12px;
    background: rgba(255, 255, 255, 0.15);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 8px;
    color: white;
    font-size: 13px;
    cursor: pointer;
    transition: all 0.3s ease;
    white-space: nowrap;
    position: relative;
}

.history-btn:hover, .favorite-city-btn:hover {
    background: rgba(255, 255, 255, 0.25);
    transform: translateY(-2px);
}

.history-btn:active, .favorite-city-btn:active {
    transform: translateY(0);
}

.favorite-city-btn {
    padding: 8px 16px;
    display: flex;
    align-items: center;
    gap: 6px;
    justify-content: space-between;
}

.remove-favorite {
    margin-left: 4px;
    cursor: pointer;
    font-size: 12px;
}

.favorite-btn {
    width: 100%;
    padding: 12px 16px;
    margin-top: 16px;
    background: rgba(255, 215, 0, 0.3);
    border: 1px solid rgba(255, 215, 0, 0.5);
    border-radius: 12px;
    color: white;
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    backdrop-filter: blur(10px);
}

.favorite-btn:hover {
    background: rgba(255, 215, 0, 0.4);
    border-color: rgba(255, 215, 0, 0.7);
    transform: translateY(-2px);
}

.favorite-btn.active {
    background: rgba(255, 215, 0, 0.6);
    border-color: rgba(255, 215, 0, 0.8);
}

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

/* ============================================
   Responsive Design
   ============================================ */

@media (max-width: 480px) {
    body {
        padding: 12px;
    }

    .weather-card {
        padding: 24px 16px;
        border-radius: 28px;
    }

    .card-header h1 {
        font-size: 24px;
    }

    .temperature {
        font-size: 40px;
    }

    .weather-icon {
        width: 56px;
        height: 56px;
    }

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

    .info-card {
        padding: 12px;
    }
}

/* ============================================
   Dark Mode Support
   ============================================ */

@media (prefers-color-scheme: dark) {
    body {
        background: var(--bg-dark);
    }

    .background-gradient {
        background: var(--bg-dark);
    }
}