/*-----------------  GOOGLE FONTS  -----------------*/
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800&family=Poppins:wght@300;400;500;600;700&display=swap');

/*-----------------  ROOT VARIABLES  -----------------*/
:root {
    /* Primary Colors */
    --primary: #3B82F6;
    --primary-light: #60A5FA;
    --primary-dark: #1D4ED8;
    
    /* Secondary Colors */
    --secondary: #8B5CF6;
    --secondary-light: #A78BFA;
    
    /* Accent Colors */
    --accent-teal: #06D6A0;
    --accent-pink: #EF476F;
    --accent-yellow: #FFD166;
    
    /* Background Colors */
    --bg-dark: #0F172A;
    --bg-card: rgba(30, 41, 59, 0.85);
    --bg-overlay: rgba(15, 23, 42, 0.7);
    
    /* Text Colors */
    --text-primary: #F1F5F9;
    --text-secondary: #CBD5E1;
    --text-muted: #94A3B8;
    
    /* Border & Shadow */
    --border-light: rgba(255, 255, 255, 0.1);
    --border-glow: rgba(59, 130, 246, 0.3);
    --shadow-lg: 0 20px 25px -5px rgba(0, 0, 0, 0.5);
    --shadow-xl: 0 25px 50px -12px rgba(0, 0, 0, 0.6);
    
    /* Gradients */
    --gradient-primary: linear-gradient(135deg, var(--primary), var(--secondary));
    --gradient-dark: linear-gradient(135deg, var(--bg-dark), #1E293B);
    --gradient-glow: linear-gradient(45deg, var(--primary), var(--accent-teal), var(--secondary));
    
    /* Transitions */
    --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-base: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 0.5s cubic-bezier(0.4, 0, 0.2, 1);
    
    /* Theme Variables */
    --theme-primary: var(--primary);
    --theme-bg: var(--bg-dark);
}

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

html {
    font-size: 62.5%;
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', sans-serif;
    font-size: 1.6rem;
    line-height: 1.6;
    color: var(--text-primary);
    background: var(--theme-bg);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 2rem;
    position: relative;
    overflow-x: hidden;
    transition: background var(--transition-slow);
}

/*-----------------  ANIMATED BACKGROUND  -----------------*/
.animated-bg {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -2;
    overflow: hidden;
}

.bg-gradient {
    position: absolute;
    width: 100%;
    height: 100%;
    background: var(--gradient-dark);
    opacity: 0.9;
}

.particles {
    position: absolute;
    width: 100%;
    height: 100%;
}

.particle {
    position: absolute;
    background: var(--theme-primary);
    border-radius: 50%;
    opacity: 0.3;
    filter: blur(10px);
    animation: float 20s infinite linear;
}

.weather-overlay {
    position: absolute;
    width: 100%;
    height: 100%;
    background: radial-gradient(circle at 20% 50%, rgba(59, 130, 246, 0.1) 0%, transparent 50%),
                radial-gradient(circle at 80% 20%, rgba(139, 92, 246, 0.1) 0%, transparent 50%);
}

/*-----------------  NOTIFICATION  -----------------*/
.notification {
    position: fixed;
    top: 2rem;
    right: 2rem;
    background: var(--bg-card);
    backdrop-filter: blur(20px);
    padding: 1.2rem 2rem;
    border-radius: 1rem;
    border-left: 4px solid var(--theme-primary);
    box-shadow: var(--shadow-lg);
    display: flex;
    align-items: center;
    gap: 1rem;
    transform: translateX(150%);
    transition: transform var(--transition-base);
    z-index: 1000;
    max-width: 350px;
}

.notification.show {
    transform: translateX(0);
}

.notification i {
    color: var(--theme-primary);
    font-size: 2rem;
}

#notification-text {
    font-size: 1.4rem;
    font-weight: 500;
}

/*-----------------  MAIN CONTAINER  -----------------*/
.container {
    width: 100%;
    max-width: 800px;
    background: var(--bg-card);
    backdrop-filter: blur(20px);
    border-radius: 2.4rem;
    padding: 4rem;
    box-shadow: 
        var(--shadow-xl),
        0 0 0 1px var(--border-light),
        0 0 50px rgba(59, 130, 246, 0.15);
    border: 1px solid var(--border-light);
    position: relative;
    overflow: hidden;
    margin: 2rem auto;
    transition: all var(--transition-base);
    animation: slideUp 0.8s ease-out;
}

.container::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: var(--gradient-glow);
    animation: borderGlow 3s linear infinite;
    background-size: 200% 200%;
}

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

@keyframes borderGlow {
    0%, 100% {
        background-position: 0% 50%;
    }
    50% {
        background-position: 100% 50%;
    }
}

/*-----------------  APP HEADER  -----------------*/
.app-header {
    text-align: center;
    margin-bottom: 4rem;
    padding-bottom: 3rem;
    border-bottom: 1px solid var(--border-light);
}

.logo {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 1.5rem;
    margin-bottom: 1.5rem;
}

.logo-icon {
    width: 6rem;
    height: 6rem;
    background: var(--gradient-primary);
    border-radius: 2rem;
    display: flex;
    align-items: center;
    justify-content: center;
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0%, 100% {
        transform: scale(1);
        box-shadow: 0 0 0 0 rgba(59, 130, 246, 0.4);
    }
    50% {
        transform: scale(1.05);
        box-shadow: 0 0 0 20px rgba(59, 130, 246, 0);
    }
}

.logo-icon i {
    font-size: 3rem;
    color: white;
}

.logo h1 {
    font-size: 4.2rem;
    font-weight: 800;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    letter-spacing: -0.5px;
}

.logo h1 span {
    color: var(--accent-teal);
}

.tagline {
    font-size: 1.8rem;
    color: var(--text-secondary);
    font-weight: 400;
    opacity: 0.9;
}

/*-----------------  SEARCH SECTION  -----------------*/
.search-section {
    margin-bottom: 4rem;
}

.search-box {
    position: relative;
    background: rgba(255, 255, 255, 0.05);
    border-radius: 1.6rem;
    padding: 1.2rem 2rem;
    border: 2px solid transparent;
    transition: all var(--transition-base);
    margin-bottom: 2rem;
}

.search-box:focus-within {
    border-color: var(--theme-primary);
    background: rgba(255, 255, 255, 0.08);
    box-shadow: 0 0 0 4px rgba(59, 130, 246, 0.15);
    transform: translateY(-2px);
}

.search-icon {
    position: absolute;
    left: 2rem;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-muted);
    font-size: 2rem;
}

.search-box input {
    width: 100%;
    background: transparent;
    border: none;
    outline: none;
    padding: 1rem 4rem 1rem 4.5rem;
    font-size: 1.8rem;
    color: var(--text-primary);
    font-weight: 500;
    font-family: 'Inter', sans-serif;
}

.search-box input::placeholder {
    color: var(--text-muted);
    font-weight: 400;
}

.search-actions {
    position: absolute;
    right: 2rem;
    top: 50%;
    transform: translateY(-50%);
}

.btn-clear {
    background: rgba(255, 255, 255, 0.1);
    border: none;
    width: 3.6rem;
    height: 3.6rem;
    border-radius: 50%;
    color: var(--text-muted);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-fast);
}

.btn-clear:hover {
    background: rgba(255, 255, 255, 0.15);
    color: var(--text-primary);
    transform: rotate(90deg);
}

/* Search Buttons */
.search-buttons {
    display: flex;
    gap: 1.5rem;
}

.btn-primary, .btn-secondary {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 1rem;
    padding: 1.6rem 2.4rem;
    border: none;
    border-radius: 1.2rem;
    font-size: 1.6rem;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-base);
    font-family: 'Inter', sans-serif;
    position: relative;
    overflow: hidden;
}

.btn-primary {
    background: var(--gradient-primary);
    color: white;
}

.btn-primary::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    transition: var(--transition-base);
}

.btn-primary:hover::before {
    left: 100%;
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 10px 25px -5px rgba(59, 130, 246, 0.4);
}

.btn-secondary {
    background: rgba(255, 255, 255, 0.1);
    color: var(--text-primary);
    border: 2px solid var(--border-light);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.15);
    border-color: var(--theme-primary);
    transform: translateY(-3px);
    box-shadow: 0 10px 25px -5px rgba(139, 92, 246, 0.3);
}



/*-----------------  WEATHER DISPLAY  -----------------*/
#show {
    min-height: 450px;
    position: relative;
}

/* Welcome Message */
.welcome-message {
    text-align: center;
    padding: 4rem 2rem;
    animation: fadeIn 0.6s ease-out;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.welcome-icon {
    font-size: 8rem;
    color: var(--theme-primary);
    margin-bottom: 3rem;
    animation: float 3s ease-in-out infinite;
}

@keyframes float {
    0%, 100% {
        transform: translateY(0);
    }
    50% {
        transform: translateY(-10px);
    }
}

.welcome-message h2 {
    font-size: 3.2rem;
    font-weight: 700;
    margin-bottom: 1.5rem;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}

/* Weather Container */
.weather-container {
    animation: fadeIn 0.8s ease-out;
}

/* Location Section */
.location-section {
    text-align: center;
    margin-bottom: 3rem;
    padding: 2rem;
    background: rgba(255, 255, 255, 0.05);
    border-radius: 2rem;
    border: 1px solid var(--border-light);
}

.location-section h2 {
    font-size: 3.6rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 1rem;
}

.location-section .country {
    font-size: 2rem;
    background: var(--gradient-primary);
    padding: 0.3rem 1rem;
    border-radius: 1rem;
    color: white;
}

.location-date {
    font-size: 1.6rem;
    color: var(--text-secondary);
    margin-top: 0.5rem;
}

/* Weather Main */
.weather-main {
    display: flex;
    align-items: center;
    justify-content: space-between;
    background: rgba(255, 255, 255, 0.05);
    border-radius: 2rem;
    padding: 3rem;
    margin-bottom: 3rem;
    border: 1px solid var(--border-light);
    position: relative;
    overflow: hidden;
}

.weather-main::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: var(--gradient-glow);
    opacity: 0.5;
}

.temp-section {
    text-align: center;
}

.current-temp {
    font-size: 8rem;
    font-weight: 800;
    line-height: 1;
    margin-bottom: 1rem;
    display: flex;
    align-items: flex-start;
    color: var(--text-primary);
}

.temp-unit {
    font-size: 4rem;
    font-weight: 600;
    color: var(--text-muted);
    margin-top: 1rem;
}

.feels-like {
    font-size: 1.6rem;
    color: var(--text-secondary);
}

.weather-icon-section {
    display: flex;
    flex-direction: column;
    align-items: center;
}

.weather-icon-large {
    font-size: 8rem;
    margin-bottom: 1.5rem;
}

.weather-icon-large.sunny { color: #F59E0B; }
.weather-icon-large.cloudy { color: #94A3B8; }
.weather-icon-large.rainy { color: #3B82F6; }
.weather-icon-large.snowy { color: #BFDBFE; }
.weather-icon-large.stormy { color: #8B5CF6; }

.weather-condition {
    font-size: 2.4rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
}

.weather-description {
    font-size: 1.6rem;
    color: var(--text-secondary);
    text-transform: capitalize;
}

/* Weather Details */
.weather-details-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
    margin-top: 3rem;
}

.detail-card {
    background: rgba(255, 255, 255, 0.05);
    border-radius: 1.6rem;
    padding: 2rem;
    border: 1px solid var(--border-light);
    transition: all var(--transition-base);
    position: relative;
    overflow: hidden;
    cursor: pointer;
}

.detail-card:hover {
    transform: translateY(-4px);
    border-color: var(--theme-primary);
    background: rgba(255, 255, 255, 0.08);
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.2);
}

.detail-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--gradient-primary);
    transform: scaleX(0);
    transition: transform var(--transition-base);
}

.detail-card:hover::before {
    transform: scaleX(1);
}

.detail-icon {
    font-size: 3rem;
    color: var(--theme-primary);
    margin-bottom: 1.5rem;
}

.detail-card h4 {
    font-size: 1.4rem;
    color: var(--text-secondary);
    margin-bottom: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    font-weight: 600;
}

.detail-card .value {
    font-size: 2.8rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
}

.detail-card .unit {
    font-size: 1.4rem;
    color: var(--text-secondary);
    font-weight: 500;
}

/* Loading State */
.loading-container {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-height: 400px;
    animation: fadeIn 0.6s ease-out;
}

.loading-spinner {
    width: 8rem;
    height: 8rem;
    border: 4px solid rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    border-top-color: var(--theme-primary);
    animation: spin 1s linear infinite;
    margin-bottom: 3rem;
}

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

.loading-text {
    font-size: 2rem;
    color: var(--text-secondary);
    font-weight: 500;
}

/* Error State */
.error-container {
    text-align: center;
    padding: 4rem 2rem;
    animation: fadeIn 0.6s ease-out;
}

.error-icon {
    font-size: 8rem;
    color: var(--accent-pink);
    margin-bottom: 2rem;
    animation: shake 0.5s ease-in-out;
}

@keyframes shake {
    0%, 100% { transform: translateX(0); }
    25% { transform: translateX(-10px); }
    75% { transform: translateX(10px); }
}

.error-title {
    font-size: 2.8rem;
    color: var(--accent-pink);
    margin-bottom: 1.5rem;
    font-weight: 700;
}

.error-message {
    font-size: 1.8rem;
    color: var(--text-secondary);
    margin-bottom: 3rem;
    max-width: 500px;
    margin-left: auto;
    margin-right: auto;
}

/*-----------------  QUICK CITIES  -----------------*/
.quick-cities {
    margin-top: 4rem;
    padding-top: 3rem;
    border-top: 1px solid var(--border-light);
}

.quick-cities h3 {
    font-size: 2rem;
    color: var(--text-primary);
    margin-bottom: 2rem;
    display: flex;
    align-items: center;
    gap: 1rem;
}

.quick-cities h3 i {
    color: var(--accent-yellow);
}

.city-chips {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
}

.city-chip {
    padding: 1rem 2rem;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--border-light);
    border-radius: 5rem;
    color: var(--text-secondary);
    font-size: 1.4rem;
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.city-chip:hover {
    background: var(--theme-primary);
    color: white;
    border-color: var(--theme-primary);
    transform: translateY(-2px);
}

/*-----------------  FOOTER  -----------------*/
.footer {
    width: 100%;
    max-width: 800px;
    margin-top: 4rem;
    padding-top: 3rem;
    border-top: 1px solid var(--border-light);
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 2rem;
}

.footer-info {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.copyright {
    font-size: 1.4rem;
    color: var(--text-secondary);
    display: flex;
    align-items: center;
    gap: 0.8rem;
}

.copyright i {
    color: var(--theme-primary);
}

.developer-link {
    color: var(--accent-teal);
    text-decoration: none;
    font-weight: 600;
    transition: all var(--transition-fast);
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
}

.developer-link:hover {
    color: var(--primary-light);
    text-decoration: underline;
}

.api-info {
    font-size: 1.3rem;
    color: var(--text-muted);
    display: flex;
    align-items: center;
    gap: 0.8rem;
}

.footer-stats {
    display: flex;
    gap: 2rem;
}

.stat {
    display: flex;
    align-items: center;
    gap: 0.8rem;
    font-size: 1.3rem;
    color: var(--text-muted);
}

.stat i {
    color: var(--theme-primary);
}

/*-----------------  THEME TOGGLE  -----------------*/
.theme-toggle {
    position: fixed;
    bottom: 3rem;
    right: 3rem;
    width: 5.6rem;
    height: 5.6rem;
    background: var(--bg-card);
    backdrop-filter: blur(20px);
    border: 1px solid var(--border-light);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all var(--transition-base);
    z-index: 100;
    box-shadow: var(--shadow-lg);
}

.theme-toggle:hover {
    transform: translateY(-3px) rotate(15deg);
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.3);
}

.theme-toggle i {
    font-size: 2.4rem;
    color: var(--text-primary);
    position: absolute;
    transition: all var(--transition-base);
}

.theme-toggle .fa-sun {
    opacity: 0;
    transform: rotate(90deg);
}

.theme-toggle .fa-moon {
    opacity: 1;
    transform: rotate(0);
}

body.light-theme .theme-toggle .fa-sun {
    opacity: 1;
    transform: rotate(0);
}

body.light-theme .theme-toggle .fa-moon {
    opacity: 0;
    transform: rotate(-90deg);
}

/*-----------------  LIGHT THEME  -----------------*/
body.light-theme {
    --bg-dark: #F8FAFC;
    --bg-card: rgba(255, 255, 255, 0.9);
    --text-primary: #1E293B;
    --text-secondary: #475569;
    --text-muted: #64748B;
    --border-light: rgba(0, 0, 0, 0.1);
    --border-glow: rgba(59, 130, 246, 0.2);
}

body.light-theme .container {
    box-shadow: 
        var(--shadow-xl),
        0 0 0 1px var(--border-light),
        0 0 50px rgba(59, 130, 246, 0.1);
}

body.light-theme .search-box {
    background: rgba(0, 0, 0, 0.05);
}

body.light-theme .detail-card {
    background: rgba(0, 0, 0, 0.05);
}

body.light-theme .weather-main {
    background: rgba(0, 0, 0, 0.05);
}

body.light-theme .location-section {
    background: rgba(0, 0, 0, 0.05);
}

/*-----------------  RESPONSIVE DESIGN  -----------------*/
@media (max-width: 768px) {
    html {
        font-size: 58%;
    }
    
    .container {
        padding: 3rem;
        border-radius: 2rem;
    }
    
    .logo h1 {
        font-size: 3.6rem;
    }
    
    .logo-icon {
        width: 5rem;
        height: 5rem;
    }
    
    .weather-main {
        flex-direction: column;
        gap: 3rem;
        text-align: center;
    }
    
    .current-temp {
        font-size: 6rem;
    }
    
    .weather-details-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .footer-content {
        flex-direction: column;
        text-align: center;
    }
    
    .search-buttons {
        flex-direction: column;
    }
}

@media (max-width: 480px) {
    html {
        font-size: 55%;
    }
    
    .container {
        padding: 2rem;
        border-radius: 1.6rem;
    }
    
    .weather-details-grid {
        grid-template-columns: 1fr;
    }
    
    .current-temp {
        font-size: 5rem;
    }
    
    .weather-icon-large {
        font-size: 6rem;
    }
    
    .notification {
        max-width: 90%;
        left: 50%;
        transform: translateX(-50%) translateX(150%);
    }
    
    .notification.show {
        transform: translateX(-50%) translateX(0);
    }
}

/*-----------------  WEATHER THEME BACKGROUNDS  -----------------*/
body.clear-bg {
    background: linear-gradient(135deg, #1a2980, #26d0ce);
}

body.clouds-bg {
    background: linear-gradient(135deg, #4A5568, #718096);
}

body.rain-bg {
    background: linear-gradient(135deg, #2C3E50, #4A90E2);
}

body.snow-bg {
    background: linear-gradient(135deg, #83a4d4, #b6fbff);
}

body.thunderstorm-bg {
    background: linear-gradient(135deg, #0f2027, #203a43);
}

body.mist-bg {
    background: linear-gradient(135deg, #636363, #a2ab58);
}

/* Weather Animations */
.rain-animation {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: -1;
    opacity: 0.3;
}

.snow-animation {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: -1;
    opacity: 0.5;
}