:root {
    --primary: #4361ee;
    --secondary: #3a0ca3;
    --accent: #4cc9f0;
    --text: #212529;
    --text-light: #6c757d;
    --bg: #f8f9fa;
    --card-bg: #ffffff;
    --border: #e9ecef;
    --shadow: rgba(0, 0, 0, 0.05);
    --danger: #f72585;
    --warning: #ff9e00;
    --success: #2ec4b6;
    --transition: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
}

.dark-mode {
    --primary: #4cc9f0;
    --secondary: #4895ef;
    --accent: #4361ee;
    --text: #f8f9fa;
    --text-light: #adb5bd;
    --bg: #121212;
    --card-bg: #1e1e1e;
    --border: #343a40;
    --shadow: rgba(0, 0, 0, 0.3);
    --danger: #ff5c8d;
    --warning: #ffb703;
    --success: #06d6a0;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Manrope', 'Inter', sans-serif;
}

body {
    background-color: var(--bg);
    color: var(--text);
    min-height: 100vh;
    padding: 20px;
    background-image: linear-gradient(135deg, var(--bg) 0%, var(--card-bg) 100%);
    transition: var(--transition);
}

.container {
    max-width: 1200px;
    margin: 0 auto;
}

/* Header Styles */
header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 0;
    margin-bottom: 30px;
    border-bottom: 2px solid var(--border);
    position: relative;
}

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
}

.logo h1 {
    font-size: 28px;
    font-weight: 800;
    color: var(--primary);
    letter-spacing: -0.5px;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.logo i {
    font-size: 32px;
    color: var(--primary);
}

.actions {
    display: flex;
    gap: 15px;
    align-items: center;
}

.theme-toggle {
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: 50px;
    width: 60px;
    height: 30px;
    position: relative;
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    padding: 0 5px;
}

.theme-toggle::before {
    content: '';
    position: absolute;
    width: 22px;
    height: 22px;
    border-radius: 50%;
    background: var(--primary);
    transition: var(--transition);
    left: 4px;
}

.dark-mode .theme-toggle::before {
    transform: translateX(30px);
    background: var(--warning);
}

.theme-toggle i {
    font-size: 14px;
    z-index: 1;
}

.theme-toggle .fa-sun {
    color: var(--warning);
    margin-right: auto;
}

.theme-toggle .fa-moon {
    color: var(--text-light);
    margin-left: auto;
}

/* Search Section */
.search-section {
    background: var(--card-bg);
    border-radius: 20px;
    padding: 25px;
    box-shadow: 0 8px 20px var(--shadow);
    margin-bottom: 30px;
    border: 1px solid var(--border);
    transition: var(--transition);
}

.search-container {
    display: flex;
    gap: 15px;
    margin-bottom: 20px;
}

.search-container input {
    flex: 1;
    padding: 16px 20px;
    border: 2px solid var(--border);
    border-radius: 14px;
    font-size: 16px;
    outline: none;
    transition: var(--transition);
    background: var(--card-bg);
    color: var(--text);
    font-weight: 500;
}

.search-container input:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 4px rgba(67, 97, 238, 0.2);
}

.search-container input::placeholder {
    color: var(--text-light);
}

.search-container button, .refresh-btn {
    background: var(--primary);
    color: white;
    border: none;
    border-radius: 14px;
    padding: 0 30px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    gap: 8px;
    box-shadow: 0 4px 12px rgba(67, 97, 238, 0.3);
}

.search-container button:hover, .refresh-btn:hover {
    background: var(--secondary);
    transform: translateY(-2px);
    box-shadow: 0 6px 16px rgba(67, 97, 238, 0.4);
}

.refresh-btn {
    padding: 12px 20px;
    font-size: 15px;
}

.refresh-btn.loading i {
    animation: spin 1s linear infinite;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

.weather-tips {
    display: flex;
    align-items: center;
    gap: 10px;
    color: var(--text-light);
    font-size: 14px;
    padding: 10px 15px;
    background: rgba(67, 97, 238, 0.05);
    border-radius: 10px;
    border: 1px solid var(--border);
}

.weather-tips i {
    color: var(--primary);
}

/* Current Weather Section */
.current-weather {
    background: var(--card-bg);
    border-radius: 20px;
    padding: 30px;
    box-shadow: 0 8px 20px var(--shadow);
    margin-bottom: 30px;
    border: 1px solid var(--border);
    display: flex;
    flex-direction: column;
    gap: 20px;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.weather-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 15px;
}

.city-name {
    font-size: 32px;
    font-weight: 800;
    color: var(--text);
    display: flex;
    align-items: center;
    gap: 10px;
}

.city-name i {
    color: var(--primary);
}

.date-time {
    font-size: 14px;
    color: var(--text-light);
    margin-top: 5px;
}

.pin-btn {
    background: var(--warning);
    color: white;
    border: none;
    border-radius: 12px;
    padding: 12px 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: var(--transition);
    font-size: 16px;
    font-weight: 600;
    gap: 8px;
    box-shadow: 0 4px 12px rgba(255, 158, 0, 0.3);
}

.pin-btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 6px 16px rgba(255, 158, 0, 0.4);
    background: #ffb703;
}

.weather-main {
    display: flex;
    align-items: center;
    gap: 30px;
}

.temperature {
    font-size: 72px;
    font-weight: 800;
    color: var(--primary);
    line-height: 1;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.weather-icon {
    font-size: 84px;
    color: var(--primary);
    transition: transform 0.5s ease;
}

.weather-icon:hover {
    transform: scale(1.1) rotate(5deg);
}

.weather-description {
    margin-left: auto;
    text-align: right;
}

.weather-description h3 {
    font-size: 24px;
    font-weight: 700;
    margin-bottom: 5px;
}

.weather-description p {
    color: var(--text-light);
    font-size: 16px;
}

.weather-details {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 20px;
    margin-top: 20px;
}

.detail-card {
    background: rgba(67, 97, 238, 0.05);
    border-radius: 16px;
    padding: 20px;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
    border: 1px solid var(--border);
    transition: var(--transition);
    backdrop-filter: blur(5px);
}

.detail-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 6px 16px rgba(0, 0, 0, 0.1);
}

.detail-card i {
    font-size: 32px;
    color: var(--primary);
}

.detail-card .label {
    font-size: 14px;
    color: var(--text-light);
    text-transform: uppercase;
    letter-spacing: 1px;
    font-weight: 600;
}

.detail-card .value {
    font-size: 24px;
    font-weight: 700;
    color: var(--text);
}

.aqi-badge {
    display: inline-block;
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 700;
    margin-top: 5px;
    text-transform: uppercase;
}

.aqi-good {
    background-color: rgba(46, 204, 113, 0.2);
    color: #27ae60;
}

.aqi-moderate {
    background-color: rgba(241, 196, 15, 0.2);
    color: #f39c12;
}

.aqi-unhealthy {
    background-color: rgba(230, 126, 34, 0.2);
    color: #e67e22;
}

.aqi-very-unhealthy {
    background-color: rgba(231, 76, 60, 0.2);
    color: #c0392b;
}

.aqi-hazardous {
    background-color: rgba(142, 68, 173, 0.2);
    color: #8e44ad;
}

/* Forecast Section */
.forecast-section {
    background: var(--card-bg);
    border-radius: 20px;
    padding: 30px;
    box-shadow: 0 8px 20px var(--shadow);
    margin-bottom: 30px;
    border: 1px solid var(--border);
    transition: var(--transition);
}

.section-title {
    font-size: 24px;
    font-weight: 800;
    margin-bottom: 25px;
    color: var(--text);
    display: flex;
    align-items: center;
    gap: 10px;
}

.section-title i {
    color: var(--primary);
}

.forecast-container {
    display: flex;
    gap: 20px;
    overflow-x: auto;
    padding: 10px 5px;
}

.forecast-card {
    min-width: 150px;
    background: rgba(67, 97, 238, 0.05);
    border-radius: 16px;
    padding: 20px;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 15px;
    border: 1px solid var(--border);
    transition: var(--transition);
}

.forecast-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 6px 16px rgba(0, 0, 0, 0.1);
}

.forecast-day {
    font-weight: 700;
    color: var(--text);
}

.forecast-icon {
    font-size: 36px;
    color: var(--primary);
}

.forecast-temp {
    font-size: 20px;
    font-weight: 700;
    color: var(--text);
}

/* Pinned Cities */
.pinned-cities {
    margin-bottom: 30px;
}

.pinned-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 20px;
}

.pinned-city {
    background: var(--card-bg);
    border-radius: 16px;
    padding: 20px;
    box-shadow: 0 6px 18px var(--shadow);
    border: 1px solid var(--border);
    display: flex;
    flex-direction: column;
    gap: 15px;
    transition: var(--transition);
    position: relative;
    backdrop-filter: blur(5px);
}

.pinned-city:hover {
    transform: translateY(-5px);
    box-shadow: 0 12px 25px rgba(0, 0, 0, 0.15);
}

.pinned-city-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.pinned-city-name {
    font-size: 20px;
    font-weight: 700;
}

.pinned-city-temp {
    font-size: 28px;
    font-weight: 800;
    color: var(--primary);
}

.pinned-city-details {
    display: flex;
    justify-content: space-between;
    color: var(--text-light);
    font-size: 14px;
}

.remove-btn {
    position: absolute;
    top: -10px;
    right: -10px;
    background: var(--danger);
    color: white;
    border: none;
    border-radius: 50%;
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    font-size: 14px;
    transition: var(--transition);
    box-shadow: 0 4px 10px rgba(247, 37, 133, 0.3);
}

.remove-btn:hover {
    transform: scale(1.1);
    box-shadow: 0 6px 14px rgba(247, 37, 133, 0.4);
}

/* Info Button */
.info-btn {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 60px;
    height: 60px;
    border-radius: 50%;
    background: var(--primary);
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    cursor: pointer;
    box-shadow: 0 6px 16px rgba(67, 97, 238, 0.4);
    transition: var(--transition);
    z-index: 100;
}

.info-btn:hover {
    transform: scale(1.1) rotate(15deg);
    box-shadow: 0 8px 20px rgba(67, 97, 238, 0.6);
    background: var(--secondary);
}

/* Modal */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.7);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.3s ease;
    backdrop-filter: blur(5px);
}

.modal.active {
    opacity: 1;
    pointer-events: all;
}

.modal-content {
    background: var(--card-bg);
    border-radius: 24px;
    width: 90%;
    max-width: 600px;
    max-height: 90vh;
    padding: 20px;
    box-shadow: 0 25px 50px rgba(0, 0, 0, 0.3);
    position: relative;
    transform: translateY(-50px);
    transition: transform 0.4s ease;
    border: 1px solid var(--border);
    overflow-y: auto;
}

.modal.active .modal-content {
    transform: translateY(0);
}

.close-btn {
    position: sticky;
    top: 10px;
    right: 10px;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: rgba(67, 97, 238, 0.1);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    font-size: 20px;
    color: var(--text);
    transition: var(--transition);
    z-index: 101;
}

.close-btn:hover {
    background: rgba(67, 97, 238, 0.2);
    transform: rotate(90deg);
    color: var(--danger);
}

.modal-title {
    font-size: 28px;
    margin-bottom: 20px;
    color: var(--primary);
    display: flex;
    align-items: center;
    gap: 15px;
    font-weight: 800;
}

.modal-title i {
    font-size: 32px;
}

.modal-section {
    margin-bottom: 20px;
}

.modal-section h3 {
    font-size: 20px;
    margin-bottom: 10px;
    color: var(--text);
    display: flex;
    align-items: center;
    gap: 10px;
    font-weight: 700;
}

.modal-section h3 i {
    color: var(--primary);
}

.modal-section p {
    line-height: 1.6;
    margin-bottom: 10px;
    color: var(--text-light);
    font-size: 15px;
}

.facts-grid {
    display: grid;
    grid-template-columns: repeat(1, 1fr);
    gap: 10px;
    margin-top: 10px;
}

.fact-card {
    background: rgba(67, 97, 238, 0.05);
    border-radius: 12px;
    padding: 15px;
    border: 1px solid var(--border);
    transition: var(--transition);
}

.fact-card:hover {
    transform: translateY(-3px);
}

.fact-card i {
    font-size: 20px;
    color: var(--primary);
    margin-bottom: 8px;
}

.portfolio-link {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    color: var(--primary);
    text-decoration: none;
    font-weight: 700;
    padding: 10px 15px;
    border-radius: 10px;
    background: rgba(67, 97, 238, 0.1);
    transition: var(--transition);
    border: 1px solid var(--border);
    margin-top: 10px;
    font-size: 14px;
}

.portfolio-link:hover {
    background: rgba(67, 97, 238, 0.2);
    transform: translateY(-2px);
    box-shadow: 0 4px 10px rgba(67, 97, 238, 0.2);
}

/* Footer */
footer {
    text-align: center;
    padding: 30px 0;
    color: var(--text-light);
    font-size: 14px;
    border-top: 1px solid var(--border);
    margin-top: 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.social-links {
    display: flex;
    gap: 15px;
}

.social-links a {
    color: var(--text-light);
    font-size: 18px;
    transition: var(--transition);
}

.social-links a:hover {
    color: var(--primary);
    transform: translateY(-3px);
}

/* Chart Container */
.chart-container {
    background: var(--card-bg);
    border-radius: 20px;
    padding: 30px;
    box-shadow: 0 8px 20px var(--shadow);
    margin-bottom: 30px;
    border: 1px solid var(--border);
    transition: var(--transition);
    height: 300px;
}

/* Loading Spinner */
.loader {
    display: none;
    width: 48px;
    height: 48px;
    border: 5px solid rgba(67, 97, 238, 0.2);
    border-bottom-color: var(--primary);
    border-radius: 50%;
    animation: rotation 1s linear infinite;
    margin: 30px auto;
}

@keyframes rotation {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* Responsive */
@media (max-width: 992px) {
    .weather-main {
        flex-wrap: wrap;
    }

    .weather-description {
        margin-left: 0;
        text-align: left;
        width: 100%;
    }
}

@media (max-width: 768px) {
    header {
        flex-direction: column;
        gap: 15px;
        align-items: flex-start;
    }

    .actions {
        width: 100%;
        justify-content: space-between;
    }

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

    .search-container button {
        padding: 16px;
        justify-content: center;
    }

    .temperature {
        font-size: 56px;
    }

    .weather-icon {
        font-size: 64px;
    }

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

    .section-title {
        font-size: 22px;
    }
}

@media (max-width: 480px) {
    .pinned-grid {
        grid-template-columns: 1fr;
    }

    .detail-card {
        padding: 15px;
    }

    .detail-card .value {
        font-size: 20px;
    }

    .modal-content {
        padding: 15px;
    }

    .modal-title {
        font-size: 24px;
    }
}