/* 
   Sileo Natural Salt - Enterprise Modern CSS
*/

:root {
    --bg-color: #FAF8F5;
    --surface-color: #FFFFFF;
    --surface-light: #F4F1EC;
    --text-primary: #1F1C18;
    --text-secondary: #665F55;
    --accent: #18abe1;
    --accent-secondary: #74b75a;
    --accent-gradient: linear-gradient(135deg, #18abe1 0%, #74b75a 100%);
    --border-color: #E2DDD5;
    --font-primary: 'Inter', sans-serif;
    --transition: all 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}

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

body {
    background-color: var(--bg-color);
    color: var(--text-primary);
    font-family: var(--font-primary);
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
    overflow-x: hidden;
}

a {
    color: inherit;
    text-decoration: none;
    transition: var(--transition);
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-weight: 600;
    letter-spacing: -0.04em;
    line-height: 1.1;
}

h1 { font-size: clamp(2.5rem, 6vw, 6rem); }
h2 { font-size: clamp(1.8rem, 5vw, 4rem); margin-bottom: 1.5rem; }
h3 { font-size: clamp(1.3rem, 3vw, 1.5rem); margin-bottom: 1rem; }

p {
    color: var(--text-secondary);
    font-size: 1.125rem;
    line-height: 1.6;
    margin-bottom: 1.5rem;
}

/* Layout */
.container {
    width: 100%;
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 2rem;
}

.section {
    padding: 8rem 0;
}

/* Nav */
.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 100;
    padding: 1.5rem 0;
    transition: var(--transition);
    background: rgba(250, 248, 245, 0.75);
    backdrop-filter: blur(8px);
    border-bottom: 1px solid transparent;
}

.header.scrolled {
    background: rgba(250, 248, 245, 0.95);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid rgba(0, 0, 0, 0.05);
    border-top: 3px solid var(--accent);
    padding: 1rem 0;
}

.nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-weight: 700;
    font-size: 1.25rem;
    letter-spacing: -0.02em;
}

.logo img {
    height: 68px;
}

.nav-links {
    display: flex;
    gap: 2.5rem;
    list-style: none;
}

.nav-links a {
    font-size: 0.875rem;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--text-secondary);
}

.nav-links a:hover, .nav-links a.active {
    color: var(--accent);
}

.mobile-toggle {
    display: none;
    background: none;
    border: none;
    color: var(--text-primary);
    font-size: 1.5rem;
    cursor: pointer;
}

/* Bento Grid */
.bento-grid {
    display: grid;
    grid-template-columns: repeat(12, 1fr);
    grid-auto-rows: minmax(300px, auto);
    gap: 1.5rem;
    margin-top: 2rem;
}

.bento-item {
    background-color: var(--surface-color);
    border: 1px solid var(--border-color);
    border-radius: 24px;
    padding: 3rem;
    position: relative;
    overflow: hidden;
    transition: var(--transition);
    display: flex;
    flex-direction: column;
}

.bento-item:hover {
    border-color: var(--accent);
    box-shadow: 0 10px 30px rgba(31, 28, 24, 0.05);
    transform: translateY(-4px);
}

.bento-item.span-12 { grid-column: span 12; }
.bento-item.span-8 { grid-column: span 8; }
.bento-item.span-6 { grid-column: span 6; }
.bento-item.span-4 { grid-column: span 4; }

.bento-item .step-number {
    font-size: 2.5rem;
    margin-bottom: 1.5rem;
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    font-weight: 700;
    display: inline-block;
}

.bento-img-bg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    z-index: 1;
    opacity: 0.4;
    transition: var(--transition);
}

.bento-item:hover .bento-img-bg {
    opacity: 0.6;
    transform: scale(1.05);
}

.bento-content {
    position: relative;
    z-index: 2;
    height: 100%;
    display: flex;
    flex-direction: column;
}

.bento-content.justify-end {
    justify-content: flex-end;
}

.bento-content.justify-center {
    justify-content: center;
    align-items: center;
    text-align: center;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 1rem 2rem;
    border-radius: 100px;
    font-size: 0.875rem;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    cursor: pointer;
    transition: var(--transition);
}

.btn-primary {
    background: var(--accent-gradient);
    color: #FFFFFF;
    border: none;
    box-shadow: 0 4px 15px rgba(24, 171, 225, 0.15);
}

.btn-primary:hover {
    box-shadow: 0 6px 20px rgba(24, 171, 225, 0.3);
    transform: translateY(-2px);
    color: #FFFFFF;
}

.btn-outline {
    background-color: transparent;
    color: var(--text-primary);
    border: 1px solid var(--border-color);
}

.btn-outline:hover {
    border-color: var(--text-primary);
}

/* Page Header */
.page-hero {
    padding: 12rem 0 6rem;
    border-bottom: 1px solid var(--border-color);
}

/* Hero Slider */
.hero-slider {
    width: 100%;
    height: 100vh;
    min-height: 700px;
    position: relative;
    background-color: var(--bg-color);
}

.hero-slider .swiper-slide {
    display: flex;
    align-items: center;
    justify-content: center;
    background-size: cover;
    background-position: center;
    position: relative;
    overflow: hidden;
}

.slide-1 { background-image: url('../images/hero_salt_4_new.png'); }
.slide-2 { background-image: url('../images/hero_salt_2_new.png'); }
.slide-3 { background-image: url('../images/hero_salt_3_new.png'); }

.slide-overlay {
    position: absolute;
    top: 0; left: 0; width: 100%; height: 100%;
    background: radial-gradient(circle, rgba(0, 0, 0, 0.25) 0%, rgba(0, 0, 0, 0.5) 100%), rgba(0, 0, 0, 0.1);
    z-index: 1;
}

.slide-content {
    position: relative;
    z-index: 2;
    padding-top: 5rem;
    text-align: center;
}

.slide-title {
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    display: inline-block;
    filter: drop-shadow(0 2px 8px rgba(0, 0, 0, 0.4));
}

.slide-subtitle {
    color: var(--accent-secondary) !important;
    margin-bottom: 2rem;
    text-shadow: 0 2px 8px rgba(0, 0, 0, 0.4);
}

.slide-content p {
    color: #f5f6f7 !important;
    max-width: 600px;
    margin-bottom: 3rem;
    margin-left: auto;
    margin-right: auto;
    text-shadow: 0 1px 5px rgba(0, 0, 0, 0.4);
}

.slide-content .btn-outline {
    color: #ffffff;
    border-color: rgba(255, 255, 255, 0.45);
}

.slide-content .btn-outline:hover {
    border-color: #ffffff;
    background-color: rgba(255, 255, 255, 0.1);
    color: #ffffff;
}

/* Minimal Swiper Controls */
.hero-slider .swiper-button-next,
.hero-slider .swiper-button-prev {
    color: #ffffff;
    width: 60px;
    height: 60px;
    border: 1px solid rgba(255, 255, 255, 0.25);
    border-radius: 50%;
    transition: var(--transition);
}

.hero-slider .swiper-button-next {
    right: 3rem;
}

.hero-slider .swiper-button-prev {
    left: 3rem;
}

.hero-slider .swiper-button-next:hover,
.hero-slider .swiper-button-prev:hover {
    background-color: #ffffff;
    color: #1F1C18;
    border-color: #ffffff;
}

.hero-slider .swiper-button-next::after,
.hero-slider .swiper-button-prev::after {
    font-size: 1.25rem;
}

.hero-slider .swiper-pagination-progressbar {
    background: rgba(255, 255, 255, 0.15);
    height: 4px;
}

.hero-slider .swiper-pagination-progressbar .swiper-pagination-progressbar-fill {
    background: var(--accent);
}

/* Forms */
.form-group {
    margin-bottom: 1.5rem;
}

.form-control {
    width: 100%;
    background-color: var(--surface-light);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    padding: 1rem 1.5rem;
    border-radius: 12px;
    font-family: inherit;
    font-size: 1rem;
    transition: var(--transition);
}

.form-control:focus {
    outline: none;
    border-color: var(--text-primary);
}

/* Footer */
.footer-grid {
    display: grid;
    grid-template-columns: repeat(12, 1fr);
    gap: 3rem;
    margin-bottom: 6rem;
}

.footer-col-brand {
    grid-column: span 5;
}

.footer-col-links {
    grid-column: span 2;
}

.footer-col h4 {
    font-size: 1.125rem;
    margin-bottom: 1.5rem;
}

.footer-col ul {
    list-style: none;
}

.footer-col ul li {
    margin-bottom: 0.75rem;
}

.footer-col a:hover {
    color: var(--text-primary);
}

/* Animations */
.reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.8s cubic-bezier(0.16, 1, 0.3, 1);
}

.reveal.active {
    opacity: 1;
    transform: translateY(0);
}

@keyframes marquee {
    0% { transform: translateX(0); }
    100% { transform: translateX(-50%); }
}

.marquee-track {
    display: flex;
    gap: 2.5rem;
    width: max-content;
    animation: marquee 40s linear infinite;
}

.marquee-track:hover {
    animation-play-state: paused;
}

/* Split Grids */
.split-grid-5-7, .split-grid-7-5 {
    display: grid;
    gap: 4rem;
    align-items: center;
}

.split-grid-5-7 {
    grid-template-columns: 5fr 7fr;
}

.split-grid-7-5 {
    grid-template-columns: 7fr 5fr;
}

.split-grid-5-7 > div, .split-grid-7-5 > div {
    min-width: 0; /* Prevents grid blowout from large images */
}

/* Responsive */
@media (max-width: 1024px) {
    .bento-item.span-4, .bento-item.span-8, .bento-item.span-6 {
        grid-column: span 12;
    }
}

@media (max-width: 768px) {
    .split-grid-5-7, .split-grid-7-5 {
        grid-template-columns: 1fr;
        gap: 3rem;
    }
    
    .bento-grid {
        display: flex;
        flex-direction: column;
    }
    .nav-links {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        width: 100%;
        background-color: var(--bg-color);
        flex-direction: column;
        padding: 2rem;
        border-bottom: 1px solid var(--border-color);
    }

    .nav-links.active {
        display: flex;
    }

    .mobile-toggle {
        display: block;
    }

    .bento-item.span-6 {
        grid-column: span 12;
    }
    
    .bento-item {
        padding: 2rem;
    }

    .footer-grid {
        grid-template-columns: 1fr;
        gap: 3rem;
    }
    .footer-col-brand, .footer-col-links {
        grid-column: span 1;
    }
    .footer-col-links[style] {
        grid-column-start: auto !important;
    }
}