/**
 * BrighterMinds RESTART - Main Styles (V2 Premium)
 * Mobile-first approach — DM Serif Display + Inter
 *
 * @package BrighterMinds
 */

/* ==========================================================================
   Fonts - Loaded locally (RGPD)
   ========================================================================== */

@font-face {
    font-family: 'DM Serif Display';
    src: url('../fonts/DMSerifDisplay-Regular.woff2') format('woff2');
    font-weight: 400;
    font-style: normal;
    font-display: swap;
}

@font-face {
    font-family: 'Inter';
    src: url('../fonts/Inter-Regular.woff2') format('woff2');
    font-weight: 400;
    font-style: normal;
    font-display: swap;
}

@font-face {
    font-family: 'Inter';
    src: url('../fonts/Inter-SemiBold.woff2') format('woff2');
    font-weight: 600;
    font-style: normal;
    font-display: swap;
}

@font-face {
    font-family: 'Inter';
    src: url('../fonts/Inter-Bold.woff2') format('woff2');
    font-weight: 700;
    font-style: normal;
    font-display: swap;
}

/* ==========================================================================
   CSS Custom Properties (V2 Design System)
   ========================================================================== */

:root {
    /* Typography */
    --bm-font-heading: 'DM Serif Display', Georgia, 'Times New Roman', serif;
    --bm-font-body: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;

    /* Type scale — base 16px mobile / 18px desktop */
    --bm-text-hero:   clamp(2rem, calc(0.909rem + 5.45vw), 3.25rem);     /* 32→52px */
    --bm-text-h2:     clamp(1.5rem, calc(0.955rem + 2.73vw), 2.25rem);   /* 24→36px */
    --bm-text-h3:     clamp(1.25rem, calc(1.023rem + 1.14vw), 1.5rem);   /* 20→24px */
    --bm-text-lead:   clamp(1.125rem, calc(1.011rem + 0.57vw), 1.25rem); /* 18→20px */
    --bm-text-body:   clamp(1rem, calc(0.955rem + 0.23vw), 1.125rem);    /* 16→18px */
    --bm-text-small:  clamp(0.875rem, calc(0.852rem + 0.11vw), 0.9375rem); /* 14→15px */

    /* Line heights per level */
    --bm-line-height:    1.6;
    --bm-lh-hero:        1.1;
    --bm-lh-h2:          1.2;
    --bm-lh-h3:          1.25;
    --bm-lh-lead:        1.5;
    --bm-lh-small:       1.5;

    /* Warm neutral palette */
    --bm-color-bg:             #FAFAF8;
    --bm-color-bg-alt:         #F2F1EE;
    --bm-color-white:          #FFFFFF;

    --bm-color-text:           #1A1A18;
    --bm-color-text-secondary: #4A4A46;
    --bm-color-text-tertiary:  #7A7A74;

    /* Accent: deep green */
    --bm-color-accent:         #2C5F4B;
    --bm-color-accent-hover:   #234D3D;
    --bm-color-accent-light:   #E8F0EC;

    /* Legacy compat aliases */
    --bm-color-primary:        #2C5F4B;
    --bm-color-primary-hover:  #234D3D;
    --bm-color-primary-light:  #E8F0EC;

    /* Borders */
    --bm-color-border:         #E0DED9;
    --bm-color-border-medium:  #C8C6C0;

    /* Semantic */
    --bm-color-error:          #C62828;
    --bm-color-success:        #2C5F4B;

    /* Spacing — fluid */
    --bm-space-xs:   clamp(0.5rem, 1vw, 0.75rem);
    --bm-space-sm:   clamp(0.75rem, 1.5vw, 1rem);
    --bm-space-md:   clamp(1rem, 2vw, 1.5rem);
    --bm-space-lg:   clamp(1.5rem, 3vw, 2rem);
    --bm-space-xl:   clamp(2rem, 4vw, 3rem);
    --bm-space-2xl:  clamp(3rem, 6vw, 5rem);

    /* Legacy spacing aliases */
    --bm-spacing-xs:      var(--bm-space-xs);
    --bm-spacing-sm:      var(--bm-space-sm);
    --bm-spacing-md:      var(--bm-space-md);
    --bm-spacing-lg:      var(--bm-space-lg);
    --bm-spacing-xl:      var(--bm-space-xl);
    --bm-spacing-section: clamp(3rem, 8vw, 6rem);

    /* Layout */
    --bm-max-width:      1100px;
    --bm-max-width-wide: 1200px;
    --bm-content-width:  680px;

    /* Buttons */
    --bm-btn-padding: 16px 32px;
    --bm-btn-min-height: 56px;
    --bm-btn-radius: 12px;

    /* Radii */
    --bm-radius-sm:  8px;
    --bm-radius-md:  12px;
    --bm-radius-lg:  16px;
    --bm-radius-xl:  20px;

    /* Shadows — layered (Apple/Stripe style) */
    --bm-shadow-sm:  0 1px 3px rgba(26,26,24,0.06), 0 2px 6px rgba(26,26,24,0.04);
    --bm-shadow-md:  0 2px 4px rgba(26,26,24,0.04), 0 4px 12px rgba(26,26,24,0.06), 0 8px 24px rgba(26,26,24,0.04);
    --bm-shadow-lg:  0 4px 8px rgba(26,26,24,0.04), 0 8px 24px rgba(26,26,24,0.06), 0 16px 48px rgba(26,26,24,0.06);

    /* Transitions */
    --bm-ease-out-expo: cubic-bezier(0.16, 1, 0.3, 1);
    --bm-duration-fast: 150ms;
    --bm-duration-normal: 250ms;
    --bm-transition: 0.25s cubic-bezier(0.16, 1, 0.3, 1);
    --bm-transition-fast: 0.15s ease;

    /* Legacy font size aliases (used in PHP templates) */
    --bm-font-size-base:  var(--bm-text-body);
    --bm-font-size-small: var(--bm-text-small);
    --bm-font-size-large: var(--bm-text-lead);
    --bm-font-size-h1:    var(--bm-text-hero);
    --bm-font-size-h2:    var(--bm-text-h2);
    --bm-font-size-h3:    var(--bm-text-h3);
}

/* ==========================================================================
   Reset & Base
   ========================================================================== */

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

*,
*::before,
*::after {
    -webkit-tap-highlight-color: transparent;
}

html {
    font-size: 100%;
    scroll-behavior: smooth;
    -webkit-text-size-adjust: 100%;
    text-size-adjust: 100%;
    overscroll-behavior-y: none;
}

body {
    font-family: var(--bm-font-body);
    font-size: var(--bm-text-body);
    line-height: var(--bm-line-height);
    color: var(--bm-color-text);
    background-color: var(--bm-color-bg);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    text-rendering: optimizeLegibility;
    font-feature-settings: "kern" 1, "liga" 1;
    overflow-x: hidden;
}

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

a {
    color: var(--bm-color-accent);
    text-decoration: underline;
    text-underline-offset: 3px;
    transition: color var(--bm-duration-fast) ease;
}

a:hover,
a:focus {
    color: var(--bm-color-accent-hover);
}

a:focus-visible {
    outline: 3px solid var(--bm-color-accent);
    outline-offset: 2px;
    border-radius: 2px;
}

ul,
ol {
    list-style: none;
}

/* ==========================================================================
   Accessibility
   ========================================================================== */

.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

.bm-skip-link {
    position: absolute;
    top: -100%;
    left: 16px;
    z-index: 10000;
    padding: 12px 24px;
    background: var(--bm-color-accent);
    color: var(--bm-color-white);
    font-weight: 600;
    text-decoration: none;
    border-radius: var(--bm-radius-md);
}

.bm-skip-link:focus {
    top: 16px;
    clip: auto;
    width: auto;
    height: auto;
    margin: 0;
    overflow: visible;
    white-space: normal;
}

/* ==========================================================================
   Typography
   ========================================================================== */

h1, h2, h3, h4, h5, h6 {
    font-family: var(--bm-font-heading);
    font-weight: 400;
    color: var(--bm-color-text);
    text-wrap: balance;
}

h1 {
    font-size: var(--bm-text-hero);
    line-height: var(--bm-lh-hero);
    letter-spacing: -0.02em;
    margin-bottom: var(--bm-space-md);
}

h2 {
    font-size: var(--bm-text-h2);
    line-height: var(--bm-lh-h2);
    letter-spacing: -0.01em;
    margin-bottom: var(--bm-space-md);
}

h3 {
    font-size: var(--bm-text-h3);
    line-height: var(--bm-lh-h3);
    letter-spacing: 0;
    margin-bottom: var(--bm-space-sm);
}

p {
    margin-bottom: var(--bm-space-sm);
    text-wrap: pretty;
}

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

strong {
    font-weight: 600;
}

/* ==========================================================================
   Layout
   ========================================================================== */

.bm-container {
    width: 100%;
    max-width: var(--bm-max-width);
    margin-left: auto;
    margin-right: auto;
    padding-left: var(--bm-space-md);
    padding-right: var(--bm-space-md);
}

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

.bm-section {
    padding-top: var(--bm-spacing-section);
    padding-bottom: var(--bm-spacing-section);
}

.bm-section--alt {
    background-color: var(--bm-color-bg-alt);
}

.bm-section__header {
    text-align: center;
    margin-bottom: var(--bm-space-lg);
}

.bm-section__subtitle {
    font-size: var(--bm-text-lead);
    line-height: var(--bm-lh-lead);
    color: var(--bm-color-text-secondary);
    margin-top: var(--bm-space-xs);
}

/* ==========================================================================
   Header / Navigation — Glassmorphism
   ========================================================================== */

.bm-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(255, 255, 255, 0.80);
    -webkit-backdrop-filter: blur(16px) saturate(1.8);
    backdrop-filter: blur(16px) saturate(1.8);
    border-bottom: 1px solid rgba(224, 222, 217, 0.5);
    transition: background var(--bm-duration-normal) ease,
                box-shadow var(--bm-duration-normal) ease;
}

.bm-header--scrolled {
    background: rgba(255, 255, 255, 0.92);
    box-shadow: 0 1px 4px rgba(26, 26, 24, 0.06);
}

.bm-header__inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    max-width: var(--bm-max-width-wide);
    margin: 0 auto;
    padding: var(--bm-space-sm) var(--bm-space-md);
    min-height: 64px;
}

.bm-header__logo {
    display: flex;
    align-items: center;
    gap: var(--bm-space-xs);
    text-decoration: none;
    color: var(--bm-color-text);
}

.bm-header__logo-img {
    height: 36px;
    width: auto;
    display: block;
}

.bm-header__logo-text {
    font-family: var(--bm-font-heading);
    font-size: 22px;
    font-weight: 400;
    color: var(--bm-color-text);
}

.bm-header__logo-tag {
    font-family: var(--bm-font-body);
    font-size: 11px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 2px;
    color: var(--bm-color-accent);
    padding: 3px 10px;
    border: 1.5px solid var(--bm-color-accent);
    border-radius: 100vw;
}

/* Nav Toggle (mobile) */
.bm-nav__toggle {
    display: flex;
    flex-direction: column;
    justify-content: center;
    gap: 5px;
    width: 44px;
    height: 44px;
    padding: 10px;
    background: none;
    border: none;
    cursor: pointer;
}

.bm-nav__toggle-bar {
    display: block;
    width: 24px;
    height: 2px;
    background-color: var(--bm-color-text);
    border-radius: 1px;
    transition: transform var(--bm-duration-fast) ease, opacity var(--bm-duration-fast) ease;
}

.bm-nav__toggle[aria-expanded="true"] .bm-nav__toggle-bar:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
}

.bm-nav__toggle[aria-expanded="true"] .bm-nav__toggle-bar:nth-child(2) {
    opacity: 0;
}

.bm-nav__toggle[aria-expanded="true"] .bm-nav__toggle-bar:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
}

/* Nav Menu */
.bm-nav__menu {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.95);
    -webkit-backdrop-filter: blur(16px);
    backdrop-filter: blur(16px);
    border-bottom: 1px solid var(--bm-color-border);
    box-shadow: var(--bm-shadow-md);
    padding: var(--bm-space-sm) 0;
}

.bm-nav__menu--open {
    display: block;
}

.bm-nav__item {
    border-bottom: 1px solid var(--bm-color-bg-alt);
}

.bm-nav__item:last-child {
    border-bottom: none;
}

.bm-nav__link {
    display: block;
    padding: var(--bm-space-sm) var(--bm-space-md);
    color: var(--bm-color-text);
    text-decoration: none;
    font-family: var(--bm-font-body);
    font-size: var(--bm-text-body);
    font-weight: 500;
    transition: background-color var(--bm-duration-fast) ease,
                color var(--bm-duration-fast) ease;
}

.bm-nav__link:hover,
.bm-nav__link:focus {
    background-color: var(--bm-color-bg-alt);
    color: var(--bm-color-accent);
}

.bm-nav__link--cta {
    color: var(--bm-color-white);
    background-color: var(--bm-color-accent);
    text-align: center;
    margin: var(--bm-space-sm) var(--bm-space-md);
    border-radius: var(--bm-radius-md);
    font-weight: 600;
}

.bm-nav__link--cta:hover,
.bm-nav__link--cta:focus {
    background-color: var(--bm-color-accent-hover);
    color: var(--bm-color-white);
}

/* ==========================================================================
   Buttons
   ========================================================================== */

.bm-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    min-height: var(--bm-btn-min-height);
    padding: var(--bm-btn-padding);
    font-family: var(--bm-font-body);
    font-size: var(--bm-text-body);
    font-weight: 600;
    line-height: 1.2;
    text-decoration: none;
    text-align: center;
    border: 2px solid transparent;
    border-radius: var(--bm-radius-md);
    cursor: pointer;
    touch-action: manipulation;
    user-select: none;
    transition: all var(--bm-duration-normal) var(--bm-ease-out-expo);
    max-width: 100%;
}

.bm-btn:active {
    transform: scale(0.97);
    transition-duration: 60ms;
}

.bm-btn:focus-visible {
    outline: 3px solid var(--bm-color-accent);
    outline-offset: 2px;
}

.bm-btn--primary {
    background-color: var(--bm-color-accent);
    color: var(--bm-color-white);
    border-color: var(--bm-color-accent);
    box-shadow: 0 2px 8px rgba(44, 95, 75, 0.25),
                inset 0 1px 0 rgba(255, 255, 255, 0.1);
}

.bm-btn--primary:hover,
.bm-btn--primary:focus {
    background-color: var(--bm-color-accent-hover);
    border-color: var(--bm-color-accent-hover);
    color: var(--bm-color-white);
    box-shadow: 0 4px 16px rgba(44, 95, 75, 0.3),
                inset 0 1px 0 rgba(255, 255, 255, 0.1);
}

.bm-btn--secondary {
    background-color: transparent;
    color: var(--bm-color-accent);
    border-color: var(--bm-color-accent);
}

.bm-btn--secondary:hover,
.bm-btn--secondary:focus {
    background-color: var(--bm-color-accent);
    color: var(--bm-color-white);
}

.bm-btn--accent {
    background-color: var(--bm-color-accent);
    color: var(--bm-color-white);
    border-color: var(--bm-color-accent);
    box-shadow: 0 2px 8px rgba(44, 95, 75, 0.25);
}

.bm-btn--accent:hover,
.bm-btn--accent:focus {
    background-color: var(--bm-color-accent-hover);
    border-color: var(--bm-color-accent-hover);
    color: var(--bm-color-white);
    box-shadow: 0 4px 16px rgba(44, 95, 75, 0.3);
}

.bm-btn--white {
    background-color: var(--bm-color-white);
    color: var(--bm-color-accent);
    border-color: var(--bm-color-white);
    box-shadow: var(--bm-shadow-lg);
}

.bm-btn--white:hover,
.bm-btn--white:focus {
    background-color: var(--bm-color-bg);
    color: var(--bm-color-accent-hover);
    box-shadow: var(--bm-shadow-lg);
}

.bm-btn--large {
    font-size: var(--bm-text-lead);
    padding: 16px 32px;
    min-height: 56px;
}

.bm-btn--full {
    width: 100%;
}

/* ==========================================================================
   Footer
   ========================================================================== */

.bm-footer {
    background-color: var(--bm-color-text);
    color: var(--bm-color-white);
    padding: var(--bm-space-xl) 0;
}

.bm-footer__inner {
    max-width: var(--bm-max-width-wide);
    margin: 0 auto;
    padding: 0 var(--bm-space-md);
    text-align: center;
}

.bm-footer__brand {
    margin-bottom: var(--bm-space-md);
}

.bm-footer__logo {
    font-family: var(--bm-font-heading);
    font-size: 24px;
    font-weight: 400;
    display: block;
    margin-bottom: var(--bm-space-xs);
}

.bm-footer__tagline {
    font-size: var(--bm-text-small);
    opacity: 0.7;
}

.bm-footer__links {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: var(--bm-space-sm) var(--bm-space-md);
    margin-bottom: var(--bm-space-md);
    padding-bottom: var(--bm-space-md);
    border-bottom: 1px solid rgba(255, 255, 255, 0.15);
}

.bm-footer__link {
    color: rgba(255, 255, 255, 0.7);
    text-decoration: none;
    font-size: var(--bm-text-small);
    transition: color var(--bm-duration-fast) ease;
}

.bm-footer__link:hover,
.bm-footer__link:focus {
    color: var(--bm-color-white);
}

.bm-footer__legal {
    font-size: var(--bm-text-small);
    opacity: 0.6;
}

.bm-footer__legal p {
    margin-bottom: var(--bm-space-xs);
}

/* ==========================================================================
   Confirmation Page
   ========================================================================== */

.bm-confirmation {
    padding-top: 120px;
}

.bm-confirmation__section {
    padding: var(--bm-space-xl) 0;
}

.bm-confirmation__inner {
    max-width: 600px;
    margin: 0 auto;
    padding: 0 var(--bm-space-md);
    text-align: center;
}

.bm-confirmation__icon {
    margin-bottom: var(--bm-space-md);
}

.bm-confirmation__title {
    font-size: var(--bm-text-hero);
    color: var(--bm-color-accent);
    margin-bottom: var(--bm-space-md);
}

.bm-confirmation__message {
    font-size: var(--bm-font-size-large);
    margin-bottom: var(--bm-space-lg);
}

.bm-confirmation__details {
    background-color: var(--bm-color-bg-alt);
    border-radius: var(--bm-radius-lg);
    padding: var(--bm-space-md);
    margin-bottom: var(--bm-space-lg);
    text-align: left;
}

.bm-confirmation__details h2 {
    font-size: var(--bm-text-h3);
    margin-bottom: var(--bm-space-sm);
}

.bm-confirmation__details li {
    padding: var(--bm-space-xs) 0;
    border-bottom: 1px solid var(--bm-color-border);
}

.bm-confirmation__details li:last-child {
    border-bottom: none;
}

.bm-confirmation__contact {
    margin-bottom: var(--bm-space-md);
    font-size: var(--bm-text-small);
    color: var(--bm-color-text-secondary);
}

/* ==========================================================================
   Scroll Reveal
   ========================================================================== */

.js-reveal {
    opacity: 0;
    transform: translateY(1.5rem);
    transition: opacity 0.5s var(--bm-ease-out-expo),
                transform 0.5s var(--bm-ease-out-expo);
}

.js-reveal.is-visible {
    opacity: 1;
    transform: translateY(0);
}

.js-reveal[data-delay="1"] { transition-delay: 80ms; }
.js-reveal[data-delay="2"] { transition-delay: 160ms; }
.js-reveal[data-delay="3"] { transition-delay: 240ms; }
.js-reveal[data-delay="4"] { transition-delay: 320ms; }

/* ==========================================================================
   Utilities
   ========================================================================== */

.bm-text-center {
    text-align: center;
}

.bm-mt-sm {
    margin-top: var(--bm-space-sm);
}

.bm-mt-md {
    margin-top: var(--bm-space-md);
}

.bm-mt-lg {
    margin-top: var(--bm-space-lg);
}

.bm-mb-sm {
    margin-bottom: var(--bm-space-sm);
}

.bm-mb-md {
    margin-bottom: var(--bm-space-md);
}

.bm-mb-lg {
    margin-bottom: var(--bm-space-lg);
}

/* Offset for fixed header */
.bm-landing {
    padding-top: 64px;
}