/* ==========================================================================
   iTour Landing Page - Base Styles
   Variables, Reset, Typography
   ========================================================================== */

/* CSS Variables */
:root {
    /* Fonts */
    --font-display: 'DM Serif Display', serif;
    --font-body: 'Inter', sans-serif;

    /* Colors - Dark Theme */
    --color-bg: #0a0a0a;
    --color-bg-alt: #141414;
    --color-surface: #1a1a1a;

    /* Colors - Light Theme */
    --color-bg-light: #ffffff;
    --color-surface-light: #fafafa;

    /* Gold Accent */
    --color-gold: #c9a962;
    --color-gold-light: #e8d5a3;
    --color-gold-dark: #a8894e;

    /* Text */
    --color-text: #ffffff;
    --color-text-muted: #888888;
    --color-text-dark: #666666;
    --color-text-light-mode: #000000;

    /* Borders */
    --color-border: rgba(201, 169, 98, 0.2);
    --color-border-light: rgba(255, 255, 255, 0.1);
    --color-border-gray: #e8e8e8;

    /* Grays */
    --gray-50: #fafafa;
    --gray-100: #f5f5f5;
    --gray-200: #e5e5e5;
    --gray-300: #d4d4d4;
    --gray-400: #a3a3a3;
    --gray-500: #737373;
    --gray-600: #525252;
    --gray-700: #404040;
    --gray-800: #262626;
    --gray-900: #171717;

    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    --spacing-2xl: 4rem;
    --spacing-3xl: 6rem;
    --spacing-4xl: 8rem;

    /* Shadows */
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 10px 20px rgba(0, 0, 0, 0.15);
    --shadow-lg: 0 20px 40px rgba(0, 0, 0, 0.2);
    --shadow-xl: 0 40px 80px rgba(0, 0, 0, 0.3);

    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition: 0.3s ease;
    --transition-slow: 0.6s ease;

    /* Border Radius */
    --radius-sm: 4px;
    --radius: 8px;
    --radius-md: 12px;
    --radius-lg: 20px;
    --radius-xl: 30px;
    --radius-full: 50%;

    /* Container */
    --container-max: 1400px;
    --container-narrow: 1200px;
    --container-text: 800px;
}

/* Reset */
*,
*::before,
*::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font-body);
    font-weight: 400;
    font-size: 1rem;
    line-height: 1.7;
    letter-spacing: -0.01em;
    color: var(--color-text);
    background-color: var(--color-bg);
    overflow-x: hidden;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-display);
    font-weight: 400;
    line-height: 1.2;
    letter-spacing: -0.02em;
}

h1 {
    font-size: clamp(2.5rem, 6vw, 4.5rem);
}

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

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

h4 {
    font-size: 1.5rem;
}

h5 {
    font-size: 1.25rem;
}

h6 {
    font-size: 1rem;
}

p {
    margin-bottom: 1rem;
}

p:last-child {
    margin-bottom: 0;
}

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

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

button {
    font-family: inherit;
    cursor: pointer;
    border: none;
    background: none;
}

/* Container */
.container {
    width: 100%;
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
}

.container--narrow {
    max-width: var(--container-narrow);
}

/* Section Label */
.section-label {
    font-size: 0.75rem;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.15em;
    color: var(--color-gold);
    margin-bottom: var(--spacing-sm);
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.75rem;
    padding: 1rem 2rem;
    font-family: var(--font-body);
    font-size: 0.95rem;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    border-radius: var(--radius);
    transition: var(--transition);
    cursor: pointer;
}

.btn svg {
    width: 20px;
    height: 20px;
}

.btn--primary {
    background: var(--color-text);
    color: var(--color-bg);
}

.btn--primary:hover {
    background: var(--color-gold);
    transform: translateY(-2px);
}

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

.btn--secondary:hover {
    background: var(--color-text);
    color: var(--color-bg);
    border-color: var(--color-text);
}

.btn--large {
    padding: 1.25rem 2.5rem;
    font-size: 1rem;
}

/* Link Arrow */
.link-arrow {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--color-text-muted);
    transition: var(--transition);
}

.link-arrow:hover {
    color: var(--color-gold);
}

.link-arrow svg {
    width: 16px;
    height: 16px;
    transition: transform var(--transition);
}

.link-arrow:hover svg {
    transform: translateX(4px);
}

/* Utility Classes */
.text-gold {
    color: var(--color-gold);
}

.text-muted {
    color: var(--color-text-muted);
}

.bg-dark {
    background-color: var(--color-bg);
}

.bg-light {
    background-color: var(--color-bg-light);
    color: var(--color-text-light-mode);
}

/* Responsive */
@media (max-width: 768px) {
    .container {
        padding: 0 var(--spacing-sm);
    }

    .btn {
        padding: 0.875rem 1.5rem;
        font-size: 0.875rem;
    }
}

@media (max-width: 480px) {
    .btn {
        width: 100%;
    }
}