/* ========================================= */
/* DESIGN SYSTEM - Visit Sapa               */
/* ========================================= */

:root {
    /* Primary Colors - Inspired by Sapa's Nature */
    --color-primary: #2D5F3F;
    /* Forest green */
    --color-secondary: #D4A574;
    /* Golden rice terraces */
    --color-accent: #E84545;
    /* Hmong red */

    /* Neutrals */
    --color-dark: #1A1A1A;
    --color-light: #F8F9FA;
    --color-gray: #6C757D;
    --color-white: #FFFFFF;

    /* Gradients */
    --gradient-hero: linear-gradient(135deg, rgba(45, 95, 63, 0.9) 0%, rgba(212, 165, 116, 0.7) 100%);
    --gradient-card: linear-gradient(to bottom, rgba(255, 255, 255, 0.1), rgba(255, 255, 255, 0.05));
    --gradient-overlay: linear-gradient(to bottom, rgba(0, 0, 0, 0.3), rgba(0, 0, 0, 0.6));

    /* Typography */
    --font-heading: 'Outfit', sans-serif;
    --font-body: 'Inter', sans-serif;
    --font-accent: 'Playfair Display', serif;

    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 4rem;
    --spacing-xl: 6rem;

    /* Border Radius */
    --radius-sm: 8px;
    --radius-md: 16px;
    --radius-lg: 24px;
    --radius-full: 9999px;

    /* Shadows */
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.15);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.2);

    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-base: 0.3s ease;
    --transition-slow: 0.5s ease;
}

/* ========================================= */
/* RESET & BASE STYLES                      */
/* ========================================= */

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

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: var(--font-body);
    color: var(--color-dark);
    line-height: 1.6;
    background-color: var(--color-light);
    overflow-x: hidden;
}

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

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

ul,
ol {
    list-style: none;
}

/* ========================================= */
/* TYPOGRAPHY                                */
/* ========================================= */

h1,
h2,
h3,
h4,
h5,
h6 {
    font-family: var(--font-heading);
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: var(--spacing-sm);
}

h1 {
    font-size: clamp(2.5rem, 5vw, 4rem);
}

h2 {
    font-size: clamp(2rem, 4vw, 3rem);
}

h3 {
    font-size: clamp(1.5rem, 3vw, 2rem);
}

h4 {
    font-size: 1.25rem;
}

p {
    margin-bottom: var(--spacing-sm);
}

.text-accent {
    font-family: var(--font-accent);
    font-style: italic;
}

/* ========================================= */
/* LAYOUT UTILITIES                          */
/* ========================================= */

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

.container-wide {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

.section {
    padding: var(--spacing-lg) 0;
}

.section-hero {
    padding: var(--spacing-xl) 0;
}

/* ========================================= */
/* BUTTONS                                   */
/* ========================================= */

.btn {
    display: inline-block;
    padding: 1rem 2rem;
    border-radius: var(--radius-full);
    font-weight: 600;
    font-size: 1rem;
    cursor: pointer;
    border: none;
    transition: all var(--transition-base);
    text-align: center;
}

.btn-primary {
    background: var(--color-primary);
    color: var(--color-white);
    box-shadow: var(--shadow-md);
}

.btn-primary:hover {
    background: #234a31;
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.btn-secondary {
    background: var(--color-secondary);
    color: var(--color-dark);
    box-shadow: var(--shadow-md);
}

.btn-secondary:hover {
    background: #c99660;
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.btn-outline {
    background: transparent;
    color: var(--color-white);
    border: 2px solid var(--color-white);
}

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

/* ========================================= */
/* CARDS                                     */
/* ========================================= */

.card {
    background: var(--color-white);
    border-radius: var(--radius-md);
    padding: var(--spacing-md);
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-base);
}

.card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.card-glass {
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.card-image {
    width: 100%;
    height: 200px;
    object-fit: cover;
    border-radius: var(--radius-sm);
    margin-bottom: var(--spacing-sm);
}

/* ========================================= */
/* NAVIGATION                                */
/* ========================================= */

.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    box-shadow: var(--shadow-sm);
    z-index: 2000;
    transition: all var(--transition-base);
}

.navbar-transparent {
    background: transparent;
    box-shadow: none;
}

.navbar-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 0;
}

.navbar-logo {
    font-family: var(--font-heading);
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-primary);
}

.navbar-transparent .navbar-logo {
    color: var(--color-white);
}

.navbar-menu {
    display: flex;
    gap: var(--spacing-md);
    align-items: center;
}

/* Dropdown Menu */
.navbar-item-dropdown {
    position: relative;
    padding: 1rem 0;
}

.navbar-dropdown {
    position: absolute;
    top: 100%;
    left: 50%;
    transform: translateX(-50%) translateY(10px);
    background: var(--color-white);
    min-width: 220px;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-base);
    padding: 1rem 0;
    z-index: 1001;
}

.navbar-item-dropdown:hover .navbar-dropdown {
    opacity: 1;
    visibility: visible;
    transform: translateX(-50%) translateY(0);
}

.navbar-dropdown-link {
    display: block;
    padding: 0.75rem 1.5rem;
    font-size: 0.95rem;
    color: var(--color-dark);
    font-weight: 500;
    transition: all var(--transition-base);
}

.navbar-dropdown-link:hover {
    background: #fdf6ec;
    color: var(--color-primary);
    padding-left: 1.75rem;
}

.navbar-dropdown-link.active {
    color: var(--color-primary);
    font-weight: 700;
}

/* Navbar CTA */
.navbar-cta {
    background: var(--color-primary);
    color: var(--color-white);
    padding: 0.75rem 1.5rem;
    border-radius: var(--radius-full);
    font-weight: 700;
    font-size: 0.9rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    border: none;
    cursor: pointer;
    transition: all var(--transition-base);
}

.navbar-cta:hover {
    background: #1a4429;
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.navbar-transparent .navbar-cta {
    background: var(--color-white);
    color: var(--color-primary);
}

.navbar-transparent .navbar-cta:hover {
    background: var(--color-secondary);
    color: var(--color-white);
}

.navbar-link {
    font-weight: 500;
    color: var(--color-dark);
    position: relative;
}

.navbar-transparent .navbar-link {
    color: var(--color-white);
}

.navbar-link::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--color-primary);
    transition: width var(--transition-base);
}

.navbar-transparent .navbar-link::after {
    background: var(--color-white);
}

.navbar-link:hover::after {
    width: 100%;
}

/* Mobile Menu Toggle */
.navbar-toggle {
    display: none;
    flex-direction: column;
    gap: 4px;
    cursor: pointer;
}

.navbar-toggle span {
    width: 25px;
    height: 3px;
    background: var(--color-dark);
    border-radius: 2px;
    transition: var(--transition-base);
}

.navbar-transparent .navbar-toggle span {
    background: var(--color-white);
}

/* ========================================= */
/* HERO SECTION                              */
/* ========================================= */

.hero {
    position: relative;
    height: 100vh;
    min-height: 600px;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    overflow: hidden;
}

.hero-background {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -2;
}

.hero-background img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--gradient-hero);
    z-index: -1;
}

.hero-content {
    color: var(--color-white);
    max-width: 800px;
    padding: var(--spacing-md);
    animation: fadeInUp 1s ease;
}

.hero-title {
    font-size: clamp(3rem, 6vw, 5rem);
    margin-bottom: var(--spacing-md);
    text-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
}

.hero-subtitle {
    font-size: clamp(1.2rem, 2vw, 1.5rem);
    margin-bottom: var(--spacing-lg);
    opacity: 0.95;
}

.hero-cta {
    display: flex;
    gap: var(--spacing-sm);
    justify-content: center;
    flex-wrap: wrap;
}

.hero-scroll {
    position: absolute;
    bottom: 2rem;
    left: 50%;
    transform: translateX(-50%);
    animation: bounce 2s infinite;
}

.hero-scroll-icon {
    width: 30px;
    height: 50px;
    border: 2px solid var(--color-white);
    border-radius: var(--radius-full);
    position: relative;
}

.hero-scroll-icon::before {
    content: '';
    position: absolute;
    top: 8px;
    left: 50%;
    transform: translateX(-50%);
    width: 6px;
    height: 6px;
    background: var(--color-white);
    border-radius: 50%;
    animation: scrollDot 2s infinite;
}

/* ========================================= */
/* ANIMATIONS                                */
/* ========================================= */

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes bounce {

    0%,
    100% {
        transform: translateX(-50%) translateY(0);
    }

    50% {
        transform: translateX(-50%) translateY(-10px);
    }
}

@keyframes scrollDot {
    0% {
        opacity: 1;
        transform: translateX(-50%) translateY(0);
    }

    100% {
        opacity: 0;
        transform: translateX(-50%) translateY(20px);
    }
}

/* ========================================= */
/* RESPONSIVE                                */
/* ========================================= */

@media (max-width: 900px) {
    .navbar-menu {
        position: fixed;
        top: 70px;
        left: 0;
        right: 0;
        background: var(--color-white);
        flex-direction: column;
        padding: var(--spacing-md);
        box-shadow: var(--shadow-lg);
        transform: translateY(-100%);
        opacity: 0;
        visibility: hidden;
        pointer-events: none;
        transition: all var(--transition-base);
        z-index: 1999;
    }

    .navbar-menu.active {
        transform: translateY(0);
        opacity: 1;
        visibility: visible;
        pointer-events: auto;
    }

    .navbar-toggle {
        display: flex;
    }

    .hero-cta {
        flex-direction: column;
        align-items: center;
    }

    .btn {
        width: 100%;
        max-width: 300px;
    }
}