/* ============================================
   CHT Combustibles Huétor Tájar - Custom Styles
   ============================================ */

/* Reset & Base */
*, *::before, *::after {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    scroll-padding-top: 80px;
}

body {
    overflow-x: hidden;
}

/* Custom Scrollbar */
::-webkit-scrollbar {
    width: 10px;
}

::-webkit-scrollbar-track {
    background: #fdfbf0;
}

::-webkit-scrollbar-thumb {
    background: #a3c084;
    border-radius: 5px;
}

::-webkit-scrollbar-thumb:hover {
    background: #5c8533;
}

/* ============================================
   Navigation
   ============================================ */
.navbar {
    background: rgba(254, 253, 248, 0.95);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(55, 82, 33, 0.08);
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.navbar.scrolled {
    background: rgba(254, 253, 248, 0.98);
    box-shadow: 0 4px 30px rgba(55, 82, 33, 0.08);
}

.nav-link {
    position: relative;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    width: 0;
    height: 2px;
    background: #5c8533;
    transition: all 0.3s ease;
    transform: translateX(-50%);
    border-radius: 1px;
}

.nav-link:hover::after {
    width: 60%;
}

/* Mobile Menu */
.mobile-menu {
    animation: slideDown 0.3s ease forwards;
}

.mobile-menu.hidden {
    animation: slideUp 0.3s ease forwards;
}

@keyframes slideDown {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes slideUp {
    from {
        opacity: 1;
        transform: translateY(0);
    }
    to {
        opacity: 0;
        transform: translateY(-10px);
    }
}

.mobile-link {
    display: block;
}

/* ============================================
   Buttons
   ============================================ */
.btn-primary {
    background: linear-gradient(135deg, #5c8533 0%, #375221 100%);
    color: #fefdf8;
    font-family: 'Nunito', sans-serif;
    font-weight: 700;
    padding: 0.75rem 1.5rem;
    border-radius: 1rem;
    border: none;
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    text-decoration: none;
    box-shadow: 0 4px 15px rgba(92, 133, 51, 0.3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(92, 133, 51, 0.4);
    background: linear-gradient(135deg, #7fa356 0%, #456828 100%);
}

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

.btn-secondary {
    background: transparent;
    color: #fefdf8;
    font-family: 'Nunito', sans-serif;
    font-weight: 700;
    padding: 0.75rem 1.5rem;
    border-radius: 1rem;
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    text-decoration: none;
}

.btn-secondary:hover {
    background: rgba(254, 253, 248, 0.1);
    transform: translateY(-2px);
}

/* ============================================
   Hero Section
   ============================================ */
.hero-section {
    position: relative;
}

.hero-section::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 120px;
    background: linear-gradient(to top, #fdfbf0, transparent);
    pointer-events: none;
}

/* ============================================
   Service Cards
   ============================================ */
.service-card {
    position: relative;
    overflow: hidden;
}

.service-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, #5c8533, #a3c084);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform 0.5s cubic-bezier(0.4, 0, 0.2, 1);
    border-radius: 2rem 2rem 0 0;
}

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

.service-card:hover {
    transform: translateY(-8px);
}

/* ============================================
   Animations
   ============================================ */
.fade-in {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.8s cubic-bezier(0.4, 0, 0.2, 1), 
                transform 0.8s cubic-bezier(0.4, 0, 0.2, 1);
}

.fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}

.fade-in-left {
    opacity: 0;
    transform: translateX(-40px);
    transition: opacity 0.8s cubic-bezier(0.4, 0, 0.2, 1), 
                transform 0.8s cubic-bezier(0.4, 0, 0.2, 1);
}

.fade-in-left.visible {
    opacity: 1;
    transform: translateX(0);
}

.fade-in-right {
    opacity: 0;
    transform: translateX(40px);
    transition: opacity 0.8s cubic-bezier(0.4, 0, 0.2, 1), 
                transform 0.8s cubic-bezier(0.4, 0, 0.2, 1);
}

.fade-in-right.visible {
    opacity: 1;
    transform: translateX(0);
}

/* Stagger delays */
.stagger-1 { transition-delay: 0.1s; }
.stagger-2 { transition-delay: 0.2s; }
.stagger-3 { transition-delay: 0.3s; }
.stagger-4 { transition-delay: 0.4s; }
.stagger-5 { transition-delay: 0.5s; }
.stagger-6 { transition-delay: 0.6s; }

/* ============================================
   Back to Top Button
   ============================================ */
.back-to-top {
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.back-to-top.visible {
    opacity: 1;
    visibility: visible;
}

.back-to-top:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 25px rgba(55, 82, 33, 0.4);
}

/* ============================================
   Form Styles
   ============================================ */
input:focus,
textarea:focus {
    box-shadow: 0 0 0 4px rgba(92, 133, 51, 0.1);
}

/* ============================================
   Responsive Adjustments
   ============================================ */
@media (max-width: 768px) {
    html {
        scroll-padding-top: 70px;
    }
    
    .hero-section h1 {
        font-size: 2.5rem;
    }
    
    .hero-section h1 br {
        display: none;
    }
    
    .service-card {
        padding: 1.5rem;
    }
}

@media (min-width: 768px) and (max-width: 1024px) {
    .hero-section h1 {
        font-size: 3.5rem;
    }
}

@media (min-width: 1024px) {
    .hero-section h1 {
        font-size: 4rem;
    }
}

/* ============================================
   Utility Animations
   ============================================ */
@keyframes float {
    0%, 100% { transform: translateY(0px); }
    50% { transform: translateY(-10px); }
}

.float-animation {
    animation: float 3s ease-in-out infinite;
}

/* Focus visible for accessibility */
*:focus-visible {
    outline: 3px solid #5c8533;
    outline-offset: 2px;
    border-radius: 4px;
}