/*
 * PivHub CSS Module: 00-foundation.css
 * Foundation: reset, tokens, utilities, and buttons.
 */

/* ==========================================================================
   PivHub — Main Stylesheet
   Global Influencer Brand Incubation Platform
   ========================================================================== */

/* --------------------------------------------------------------------------
   1. CSS Reset & Base
   -------------------------------------------------------------------------- */

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

:root {
    /* Theme palette */
    --theme-bg: #0A0A0A;
    --theme-bg-rgb: 10, 10, 10;
    --theme-bg-deep: #050505;
    --theme-bg-elevated: #101010;
    --theme-surface: #1A1A1A;
    --theme-surface-soft: #222222;
    --theme-accent: #D7262E;
    --theme-accent-rgb: 215, 38, 46;
    --theme-accent-light: #EF4B50;
    --theme-accent-dark: #A9151C;

    /* Colors */
    --color-black: var(--theme-bg);
    --color-white: #FFFFFF;
    --color-accent: var(--theme-accent);
    --color-accent-light: var(--theme-accent-light);
    --color-accent-dark: var(--theme-accent-dark);
    --color-gold: var(--theme-accent);
    --color-gold-light: var(--theme-accent-light);
    --color-gold-dark: var(--theme-accent-dark);
    --color-charcoal: var(--theme-surface);
    --color-charcoal-light: var(--theme-surface-soft);
    --color-cloud: #F5F5F5;
    --color-muted: #8B8B8B;
    --color-border: #E8E8E8;
    --color-success: #4CAF50;
    --color-accent-orange: #FF6B35;
    --color-on-dark-strong: #FFFFFF;
    --color-on-dark-medium: rgba(255, 255, 255, 0.76);
    --color-on-dark-muted: rgba(255, 255, 255, 0.56);
    --color-on-dark-line: rgba(255, 255, 255, 0.16);
    --color-on-dark-wash: rgba(255, 255, 255, 0.08);

    /* Typography */
    --font-display: 'Playfair Display', Georgia, 'Times New Roman', serif;
    --font-body: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Helvetica Neue', Arial, sans-serif;
    --font-data: 'Space Grotesk', 'SF Mono', 'Fira Code', monospace;

    /* Font Sizes */
    --fs-display-xl: clamp(40px, 6vw, 72px);
    --fs-display-l: clamp(32px, 4.5vw, 56px);
    --fs-h1: clamp(28px, 3.5vw, 40px);
    --fs-h2: clamp(24px, 2.5vw, 32px);
    --fs-h3: 24px;
    --fs-body-lg: 18px;
    --fs-body: 16px;
    --fs-caption: 14px;
    --fs-micro: 12px;

    /* Line Heights */
    --lh-tight: 1.1;
    --lh-display: 1.2;
    --lh-heading: 1.3;
    --lh-heading-relaxed: 1.4;
    --lh-body-lg: 1.6;
    --lh-body: 1.7;
    --lh-caption: 1.5;
    --lh-micro: 1.4;

    /* Spacing */
    --space-1: 8px;
    --space-2: 16px;
    --space-3: 24px;
    --space-4: 32px;
    --space-5: 40px;
    --space-6: 48px;
    --space-8: 64px;
    --space-10: 80px;
    --space-15: 120px;

    /* Container */
    --container-max: 1280px;
    --container-pad: 24px;

    /* Layout */
    --header-height: 72px;
    --radius-sm: 6px;
    --radius-md: 12px;
    --radius-lg: 20px;
    --radius-full: 9999px;

    /* Transitions */
    --ease: cubic-bezier(0.4, 0, 0.2, 1);
    --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
    --transition-fast: 0.2s var(--ease);
    --transition: 0.3s var(--ease);
    --transition-slow: 0.6s var(--ease);

    /* Shadows */
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.08);
    --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.12);
    --shadow-lg: 0 16px 48px rgba(0, 0, 0, 0.16);
    --shadow-xl: 0 24px 64px rgba(0, 0, 0, 0.2);
    --shadow-accent: 0 8px 32px rgba(var(--theme-accent-rgb), 0.3);
    --shadow-gold: var(--shadow-accent);
}

html {
    font-size: 16px;
    scroll-behavior: smooth;
    -webkit-text-size-adjust: 100%;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font-body);
    font-size: var(--fs-body);
    line-height: var(--lh-body);
    color: var(--color-white);
    background-color: var(--color-black);
    overflow-x: hidden;
    min-height: 100vh;
}

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

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

ul,
ol {
    list-style: none;
}

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

input,
textarea,
select {
    font-family: inherit;
    font-size: inherit;
    color: inherit;
}

h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-display);
    font-weight: 700;
    line-height: var(--lh-heading);
}

::selection {
    background: var(--color-gold);
    color: var(--color-black);
}

::-moz-selection {
    background: var(--color-gold);
    color: var(--color-black);
}

:focus-visible {
    outline: 2px solid var(--color-gold);
    outline-offset: 3px;
}

/* --------------------------------------------------------------------------
   2. Layout Utilities
   -------------------------------------------------------------------------- */

.container {
    width: 100%;
    max-width: var(--container-max);
    margin-inline: auto;
    padding-inline: var(--container-pad);
}

.text-accent {
    color: var(--color-on-dark-strong);
}

.section-eyebrow {
    display: inline-block;
    font-family: var(--font-body);
    font-size: var(--fs-micro);
    font-weight: 600;
    letter-spacing: 0.18em;
    text-transform: uppercase;
    color: var(--color-on-dark-medium);
    margin-bottom: var(--space-2);
}

.text-accent {
    font-style: italic;
}

.hero-title-accent,
.final-cta-title .text-accent {
    font-style: italic;
}

.section-header {
    margin-bottom: var(--space-8);
}

.section-title {
    font-family: var(--font-display);
    font-size: var(--fs-h1);
    line-height: var(--lh-heading);
    color: var(--color-white);
    font-weight: 700;
}

.section-header-center {
    text-align: center;
    max-width: 720px;
    margin-inline: auto;
}

.section-header-center .section-title {
    color: var(--color-white);
}

/* --------------------------------------------------------------------------
   3. Buttons
   -------------------------------------------------------------------------- */

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-1);
    padding: 14px 28px;
    font-family: var(--font-body);
    font-size: var(--fs-caption);
    font-weight: 600;
    letter-spacing: 0.04em;
    line-height: 1;
    text-transform: uppercase;
    border-radius: var(--radius-full);
    cursor: pointer;
    transition: all var(--transition);
    white-space: nowrap;
    border: 1.5px solid transparent;
    position: relative;
    overflow: hidden;
}

.btn-arrow {
    display: inline-block;
    transition: transform var(--transition);
    font-size: 1.1em;
    line-height: 1;
}

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

.btn-primary {
    background: var(--color-gold);
    color: var(--color-white);
    border-color: var(--color-gold);
}

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

.btn-outline {
    background: transparent;
    color: var(--color-white);
    border-color: rgba(255, 255, 255, 0.3);
}

.btn-outline:hover {
    border-color: var(--color-on-dark-strong);
    color: var(--color-on-dark-strong);
    transform: translateY(-2px);
    box-shadow: 0 4px 20px rgba(255, 255, 255, 0.1);
}

.btn-sm {
    padding: 10px 20px;
    font-size: var(--fs-micro);
}

.btn-lg {
    padding: 18px 40px;
    font-size: var(--fs-body);
}

.btn-block {
    display: flex;
    width: 100%;
}