/* ============================================================
   KatyaFit — 01 base: токены, reset, типографика, layout, кнопки, шапка/навигация
   Часть styles.css. Подключается на страницах в фиксированном порядке.
   ============================================================ */

/* ============================================================
   KatyaFit — Premium Stylesheet (Visual Redesign 2.0 — 2025/2026 Trends)
   ============================================================ */

/* CSS Variables & Premium Design Tokens */
:root {
    /* Color Palette — Light cream base (Redesign 3.0: Cream, Gold & Sage) */
    --bg-milk: #f7f5f0;             /* Warm cream (trainer palette) */
    --bg-pure: #ffffff;             /* Pure white */
    --text-main: #1a1f1c;           /* Deep ink with sage hint */
    --text-muted: #6a645e;          /* Warm gray */

    /* Sage Green Accents (ex-forest) */
    --accent-forest: #232823;       /* Deep sage (headings, footer) */
    --accent-forest-medium: #3e4a40;/* Medium sage */
    --accent-forest-light: #7d9b82; /* Soft sage */

    /* Warm Gold Accents (ex-coral) */
    --accent-coral: #c9a96e;        /* Warm gold */
    --accent-coral-hover: #b8964f;  /* Deeper gold for hover states */
    --accent-coral-light: #f5efe2;  /* Gentle gold-cream tint */

    /* Cream & Gold highlights */
    --accent-champagne: #f3edd8;    /* Champagne gold cream */
    --accent-champagne-dark: #ebdcb6;

    /* Borders & Outlines */
    --border-color: rgba(26, 31, 28, 0.08);
    --border-color-focus: rgba(201, 169, 110, 0.4);

    /* Premium Shadow Systems (layered, warm-tinted) */
    --shadow-soft: 0 4px 16px rgba(26, 31, 28, 0.03), 0 1px 3px rgba(26, 31, 28, 0.02);
    --shadow-premium: 0 8px 32px rgba(26, 31, 28, 0.05), 0 2px 8px rgba(26, 31, 28, 0.03);
    --shadow-hover: 0 20px 48px rgba(26, 31, 28, 0.08), 0 4px 12px rgba(26, 31, 28, 0.04);

    /* Trainer page dark theme tokens (Dark Sage & Warm Gold) */
    --bg-deep: #1a1f1c;
    --bg-surface: #232823;
    --bg-elevated: #2d332e;
    --bg-cream: #f7f5f0;
    --accent: #c9a96e;
    --accent-hover: #b8964f;
    --accent-soft: rgba(201, 169, 110, 0.10);
    --accent-glow: rgba(201, 169, 110, 0.18);
    --sage: #7d9b82;
    --sage-soft: rgba(125, 155, 130, 0.10);
    --light: #eae6de;
    --light-muted: #9a9690;
    --ink: #1a1f1c;
    --ink-muted: #6a645e;
    --border-dark: rgba(255, 255, 255, 0.07);
    --border-light: rgba(26, 31, 28, 0.08);
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.04);
    --shadow-md: 0 8px 32px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 20px 48px rgba(0, 0, 0, 0.10);
    --shadow-gold: 0 8px 24px rgba(201, 169, 110, 0.20);

    /* Motion */
    --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
    --ease-spring: cubic-bezier(0.34, 1.3, 0.64, 1);

    /* Typography — Serif + Sans-serif pair */
    --font-serif: 'Cormorant Garamond', 'Georgia', 'Times New Roman', serif;
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    --font-title: var(--font-serif);
    --font-display: var(--font-serif);
    --font-ui: 'Plus Jakarta Sans', var(--font-sans);
    
    /* Transitions */
    --transition-smooth: all 0.5s cubic-bezier(0.16, 1, 0.3, 1);
    --transition-fast: all 0.2s ease;
    
    --container-max-width: 1200px;

    /* Backward Compatibility Aliases */
    --accent-olive-dark: var(--accent-forest);
    --accent-olive-medium: var(--accent-forest-medium);
    --accent-olive-light: var(--accent-forest-light);
    --accent-cream: var(--bg-milk);
    --accent-cream-dark: var(--accent-champagne-dark);
}

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

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

body {
    background-color: var(--bg-milk);
    color: var(--text-main);
    font-family: var(--font-sans);
    line-height: 1.65;
    -webkit-font-smoothing: antialiased;
    overflow-x: hidden;
}

/* Subtle grain texture for organic, handcrafted feel */
body::after {
    content: '';
    position: fixed;
    inset: 0;
    pointer-events: none;
    z-index: 9999;
    opacity: 0.018;
    background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
    background-repeat: repeat;
    mix-blend-mode: multiply;
}

/* Custom Selection Color */
::selection {
    background-color: var(--accent-coral-light);
    color: var(--accent-forest);
}

/* Typography */
h1, h2, h3, h4 {
    font-family: var(--font-title);
    font-weight: 600;
    line-height: 1.2;
    color: var(--accent-forest);
    letter-spacing: -0.01em;
}

/* Inline Icons alignment */
.icon-inline {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    vertical-align: middle;
    width: 1.1em;
    height: 1.1em;
    margin-right: 0.35em;
    margin-top: -3px;
    color: var(--accent-coral);
}

p {
    font-weight: 400;
    color: var(--text-muted);
}

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

/* Layout */
.container {
    width: 100%;
    max-width: var(--container-max-width);
    margin: 0 auto;
    padding: 0 2.5rem;
}

.section {
    padding: clamp(4.5rem, 8vw, 10rem) 0;
    position: relative;
}

.section-light {
    background-color: var(--bg-pure);
}

/* Subpages main padding */
.main-subpage {
    padding-top: calc(130px + env(safe-area-inset-top, 0px));
    min-height: calc(100vh - 165px - 90px);
}

/* Typography Components */
.section-badge {
    display: inline-flex;
    align-items: center;
    font-family: var(--font-ui);
    font-size: 0.72rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 2.5px;
    color: var(--accent-coral);
    margin-bottom: 1.25rem;
    background: var(--accent-coral-light);
    padding: 0.4rem 1rem;
    border-radius: 50px;
}

.section-title {
    font-size: clamp(1.85rem, 3vw + 0.5rem, 3rem);
    font-weight: 600;
    margin-bottom: 3.5rem;
    letter-spacing: -0.02em;
    color: var(--accent-forest);
}

.section-title span {
    color: var(--accent-forest-light);
    font-weight: 400;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.75rem;
    padding: 1.1rem 2.5rem;
    font-family: var(--font-ui);
    font-size: 0.9rem;
    font-weight: 700;
    border-radius: 50px;
    cursor: pointer;
    transition: var(--transition-smooth);
    border: none;
    text-decoration: none;
}

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none !important;
}

.btn-primary {
    background-color: var(--accent-coral);
    color: var(--text-main);
    box-shadow: 0 8px 20px rgba(201, 169, 110, 0.18);
}

.btn-primary:hover:not(:disabled) {
    background-color: var(--accent-coral-hover);
    transform: scale(1.03);
    box-shadow: 0 12px 28px rgba(201, 169, 110, 0.28);
}

.btn-secondary {
    background-color: transparent;
    color: var(--accent-forest);
    border: 1.5px solid var(--accent-forest);
}

.btn-secondary:hover:not(:disabled) {
    background-color: var(--accent-forest);
    color: var(--bg-pure);
    transform: scale(1.03);
}

/* Nav button */
.btn-nav {
    padding: 0.65rem 1.6rem;
    font-size: 0.85rem;
    border-radius: 50px;
    border-width: 1.5px;
}

/* Full-width submit button */
.btn-submit {
    width: 100%;
    margin-top: 1rem;
    padding: 1.2rem;
}

/* Header & Navigation (Floating Glass Effect) */
.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    /* Высота + запас под «остров»/чёлку: в webview ВК/Telegram шапка
       заливает безопасную зону сверху, не оставляя зазора (env=0 на десктопе) */
    height: calc(100px + env(safe-area-inset-top, 0px));
    padding-top: env(safe-area-inset-top, 0px);
    background-color: rgba(247, 245, 240, 0.75);
    /* Сильнее «замыливаем» зону под островом/чёлкой в webview ВК/Telegram,
       чтобы сквозь шапку не просвечивал контент (blur 32 + насыщенность) */
    backdrop-filter: blur(32px) saturate(1.1);
    -webkit-backdrop-filter: blur(32px) saturate(1.1);
    border-bottom: 1px solid var(--border-color);
    z-index: 100;
    display: flex;
    align-items: center;
    transition: var(--transition-smooth);
}

.header-scrolled {
    height: calc(80px + env(safe-area-inset-top, 0px));
    background-color: rgba(247, 245, 240, 0.92);
    box-shadow: 0 8px 32px rgba(26, 31, 28, 0.03);
}

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

.logo {
    font-size: 1.25rem;
    font-weight: 800;
    letter-spacing: 2px;
    text-transform: uppercase;
    color: var(--accent-forest);
    display: flex;
    align-items: center;
}

.logo span {
    font-weight: 300;
    color: var(--accent-coral);
}

.nav {
    display: flex;
    align-items: center;
    gap: 2.5rem;
}

.nav-link {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--accent-forest);
    position: relative;
    padding: 0.5rem 0;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    width: 0;
    height: 2px;
    background-color: var(--accent-coral);
    transition: var(--transition-smooth);
    transform: translateX(-50%);
}

.nav-link:hover::after,
.nav-link--active::after {
    width: 100%;
}

.nav-link--active {
    color: var(--accent-coral);
}

/* Mobile Menu Toggle */
.menu-toggle {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0.5rem;
    z-index: 110;
}

.menu-toggle-icon {
    display: block;
    width: 24px;
    height: 2px;
    background-color: var(--accent-forest);
    position: relative;
    transition: var(--transition-smooth);
}

.menu-toggle-icon::before,
.menu-toggle-icon::after {
    content: '';
    position: absolute;
    width: 24px;
    height: 2px;
    background-color: var(--accent-forest);
    left: 0;
    transition: var(--transition-smooth);
}

.menu-toggle-icon::before { top: -7px; }
.menu-toggle-icon::after  { bottom: -7px; }

.menu-toggle.active .menu-toggle-icon {
    background-color: transparent;
}
.menu-toggle.active .menu-toggle-icon::before {
    transform: rotate(45deg);
    top: 0;
    background-color: var(--accent-forest);
}
.menu-toggle.active .menu-toggle-icon::after {
    transform: rotate(-45deg);
    bottom: 0;
    background-color: var(--accent-forest);
}