/* ============================================
   COMPONENTES - Weather App
   Botones, inputs, cards y elementos reutilizables
   ============================================ */

/* ============================================
   ACCESIBILIDAD
   ============================================ */

/* Skip Link para navegación por teclado */
.skip-link {
    position: absolute;
    top: -100px;
    left: 0;
    background: var(--primary);
    color: white;
    padding: 0.75rem 1.5rem;
    text-decoration: none;
    border-radius: 0 0 8px 0;
    font-weight: 600;
    z-index: 10000;
    transition: top 0.3s ease;
}

.skip-link:focus {
    top: 0;
    outline: 3px solid var(--accent);
    outline-offset: 2px;
}

/* Screen reader only content */
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border-width: 0;
}

/* Focus visible mejorado para navegación por teclado */
body.keyboard-nav *:focus {
    outline: 3px solid var(--accent);
    outline-offset: 3px;
    box-shadow: 0 0 0 6px rgba(245, 158, 11, 0.2);
}

body.keyboard-nav button:focus,
body.keyboard-nav a:focus,
body.keyboard-nav input:focus {
    transform: scale(1.02);
    transition: transform 0.2s ease;
}

/* ============================================
   BOTÓN VOLVER
   ============================================ */

.back-button {
    position: fixed;
    top: 20px;
    left: 20px;
    left: max(20px, env(safe-area-inset-left));
    background: rgba(74, 144, 226, 0.9);
    -webkit-backdrop-filter: blur(10px);
    backdrop-filter: blur(10px);
    color: white;
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 12px;
    padding: 0.75rem 1.25rem;
    font-size: 0.9rem;
    font-weight: 500;
    cursor: pointer;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.3);
    transition: all 0.3s ease;
    z-index: 9999;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
}

.back-button:hover {
    background: rgba(74, 144, 226, 1);
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.4);
}

.back-button:focus {
    outline: 3px solid var(--accent);
    outline-offset: 2px;
}

/* ============================================
   HEADER
   ============================================ */

.header {
    text-align: center;
    margin-bottom: 2rem;
    padding: 1rem 1rem 0.5rem;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
    background: transparent;
    -webkit-backdrop-filter: none;
    backdrop-filter: none;
    border-bottom: none;
    position: sticky;
    top: 0;
    z-index: 50;
}

.header-top {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 1.5rem;
    width: 100%;
    position: relative;
}

/* Theme Toggle Button */
.theme-toggle {
    position: absolute;
    right: 0;
    top: 50%;
    transform: translateY(-50%);
    background: rgba(26, 31, 58, 0.3);
    border: 1px solid var(--border);
    border-radius: 50%;
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 0.3s ease;
    -webkit-backdrop-filter: blur(10px);
    backdrop-filter: blur(10px);
    font-size: 1.5rem;
}

.theme-toggle:hover {
    background: rgba(26, 31, 58, 0.5);
    border-color: var(--primary);
    transform: translateY(-50%) scale(1.1);
    box-shadow: 0 4px 12px rgba(96, 165, 250, 0.3);
}

.theme-toggle:active {
    transform: translateY(-50%) scale(0.95);
}

.theme-icon {
    width: 24px;
    height: 24px;
    transition: transform 0.3s ease, filter 0.3s ease;
    display: block;
    filter: drop-shadow(0 2px 4px rgba(0, 0, 0, 0.2));
}

.theme-toggle:hover .theme-icon {
    transform: rotate(20deg);
    filter: drop-shadow(0 4px 8px rgba(96, 165, 250, 0.4));
}

body.light-theme .theme-icon {
    filter: drop-shadow(0 2px 4px rgba(255, 200, 0, 0.3));
}

body.light-theme .theme-toggle:hover .theme-icon {
    filter: drop-shadow(0 4px 8px rgba(255, 200, 0, 0.5));
}

/* Light theme adjustments */
body.light-theme .theme-toggle {
    background: rgba(255, 255, 255, 0.5);
    border-color: rgba(0, 0, 0, 0.1);
}

body.light-theme .theme-toggle:hover {
    background: rgba(255, 255, 255, 0.8);
    border-color: var(--primary);
}

.weather-hero-icon {
    font-size: 2rem;
    animation: float 3s ease-in-out infinite;
    filter: drop-shadow(0 4px 8px rgba(96, 165, 250, 0.3));
}

@keyframes float {
    0%, 100% { transform: translateY(0px); }
    50% { transform: translateY(-8px); }
}

.header h1 {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 0.25rem;
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    letter-spacing: -0.02em;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.header p {
    color: var(--text-secondary);
    font-size: 0.85rem;
    font-weight: 400;
    letter-spacing: 0.02em;
    margin-bottom: 0.5rem;
}

.sky-status {
    display: none;
}

/* ============================================
   SEARCH SECTION
   ============================================ */

.search-section {
    background: rgba(26, 31, 58, 0.6);
    -webkit-backdrop-filter: blur(20px);
    backdrop-filter: blur(20px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    padding: 2.5rem;
    border-radius: 28px;
    margin-bottom: 2rem;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
    transition: all 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

.search-section.compact {
    position: fixed;
    top: 80px;
    right: 20px;
    max-width: 380px;
    padding: 1rem 1.25rem;
    z-index: 99;
    margin: 0;
    border-radius: 20px;
}

.search-section.compact .search-container {
    gap: 0.5rem;
}

.search-section.compact .search-input {
    padding: 0.75rem 1rem;
    font-size: 0.9rem;
}

.search-section.compact .btn-primary {
    padding: 0.75rem 1.5rem;
    font-size: 0.9rem;
}

.search-section.compact .geolocation-btn {
    display: none;
}

.search-section:hover {
    transform: translateY(-4px);
    box-shadow: 0 30px 80px rgba(96, 165, 250, 0.2);
}

.search-section.compact:hover {
    transform: translateY(0);
    box-shadow: 0 8px 24px rgba(96, 165, 250, 0.3);
}

.search-container {
    display: flex;
    gap: 1rem;
    margin-bottom: 0;
}

/* ============================================
   INPUTS
   ============================================ */

.search-input {
    flex: 1;
    padding: 1.25rem 1.75rem;
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 20px;
    font-size: 1.1rem;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    background: rgba(26, 31, 58, 0.5);
    color: var(--text-primary);
    font-weight: 400;
    font-family: var(--font-primary);
}

.search-input:focus {
    outline: none;
    border-color: var(--primary);
    background: rgba(26, 31, 58, 0.7);
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(96, 165, 250, 0.2);
}

.search-input::placeholder {
    color: var(--text-secondary);
    font-weight: 300;
}

/* ============================================
   BOTONES
   ============================================ */

.btn {
    padding: 1.25rem 2.5rem;
    border: none;
    border-radius: 20px;
    font-size: 1rem;
    cursor: pointer;
    font-weight: 600;
    font-family: var(--font-primary);
    display: inline-flex;
    align-items: center;
    gap: 0.75rem;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary) 0%, #3b82f6 100%);
    color: white;
    border: 1px solid transparent;
    box-shadow: 0 8px 24px rgba(96, 165, 250, 0.3);
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 12px 32px rgba(96, 165, 250, 0.4);
}

.btn-secondary {
    background: rgba(255, 255, 255, 0.05);
    color: var(--text-primary);
    border: 1px solid rgba(255, 255, 255, 0.1);
    -webkit-backdrop-filter: blur(10px);
    backdrop-filter: blur(10px);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: var(--primary);
    transform: translateY(-3px);
    box-shadow: 0 8px 24px rgba(96, 165, 250, 0.2);
}

.geolocation-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.75rem;
    width: 100%;
    margin-top: 1.5rem;
}

.geolocation-btn::before {
    content: '📍';
    font-size: 1.2rem;
}

/* ============================================
   UNITS TOGGLE
   ============================================ */

.units-toggle {
    position: absolute;
    top: 50%;
    right: 2rem;
    transform: translateY(-50%);
    z-index: 10;
}

.unit-btn {
    width: 60px;
    height: 60px;
    border: 2px solid rgba(255, 255, 255, 0.3);
    background: rgba(26, 31, 58, 0.7);
    -webkit-backdrop-filter: blur(15px);
    backdrop-filter: blur(15px);
    border-radius: 50%;
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
    padding: 8px;
}

.unit-btn img {
    width: 100%;
    height: 100%;
    object-fit: contain;
    transition: transform 0.3s ease;
}

.unit-btn:hover {
    border-color: rgba(96, 165, 250, 0.8);
    transform: scale(1.1) rotate(5deg);
    box-shadow: 0 6px 20px rgba(96, 165, 250, 0.4);
    background: rgba(26, 31, 58, 0.85);
}

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

/* ============================================
   LOADING & ERROR
   ============================================ */

.loading {
    display: none;
    text-align: center;
    padding: 2rem;
    background: var(--white);
    border-radius: var(--border-radius);
    box-shadow: 0 8px 32px var(--shadow);
}

.spinner {
    width: 50px;
    height: 50px;
    border: 4px solid var(--light);
    border-top: 4px solid var(--primary);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin: 0 auto 1rem;
}

.error {
    display: none;
    background: #ffebee;
    color: #c62828;
    padding: 1rem;
    border-radius: var(--border-radius);
    margin-top: 1rem;
    border-left: 4px solid #c62828;
}