/* ===================================
   PPTControl Design System
   =================================== */

@font-face {
    font-family: 'Inter';
    font-style: normal;
    font-weight: 400 700;
    font-display: swap;
    src: url('/assets/fonts/inter-latin-400-700.woff2') format('woff2');
    unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}

:root {
    /* Core neutrals */
    --bg: #0F0A10;
    --bg-soft: #17111A;
    --surface: #211722;
    --border: #332433;

    /* Brand */
    --primary: #FF4D67;
    --primary-strong: #E31542;
    --secondary: #FF7E45;
    --highlight: #FFC3A8;
    --brand-gradient: linear-gradient(135deg, #FF7E45 0%, #FF4D67 48%, #E31542 100%);

    /* Text */
    --text: #FFF7F5;
    --text-secondary: #D7C8CD;
    --text-muted: #A88F99;

    /* Spacing */
    --space-xs: 4px;
    --space-sm: 8px;
    --space-md: 16px;
    --space-lg: 24px;
    --space-xl: 40px;
    --space-2xl: 64px;
    --space-3xl: 100px;
    --space-4xl: 140px;

    /* Layout */
    --content-width: 1200px;
    --content-padding: max(24px, env(safe-area-inset-left));

    /* Radius */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 24px;

    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-base: 250ms ease;
    --transition-slow: 400ms ease;

    /* Shadows */
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.3);
    --shadow-glow: 0 0 40px rgba(255, 77, 103, 0.08);
}


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

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

html, body {
    height: 100%;
    scroll-behavior: smooth;
    scroll-padding-top: 80px;
}

body {
    display: flex;
    flex-direction: column;
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background-color: var(--bg);
    color: var(--text);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

main {
    flex: 1 0 auto;
    padding-top: 72px;
    transition: filter var(--transition-base);
}

body.menu-open main,
body.menu-open footer {
    filter: blur(8px);
    pointer-events: none;
}

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

a {
    color: inherit;
    text-decoration: none;
}


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

.link {
    color: var(--primary);
    text-decoration: underline;
    text-underline-offset: 2px;
    text-decoration-color: rgba(255, 77, 103, 0.4);
    cursor: pointer;
    transition: text-decoration-color var(--transition-fast);
}

.link:hover {
    text-decoration-color: var(--primary);
}

.link:focus-visible {
    outline: 2px solid var(--primary);
    outline-offset: 2px;
    border-radius: 2px;
}

.btn-primary {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 14px 28px;
    background: var(--brand-gradient);
    color: #fff;
    border: none;
    border-radius: var(--radius-md);
    font-family: inherit;
    font-weight: 600;
    font-size: 1rem;
    cursor: pointer;
    transition: opacity var(--transition-fast), transform var(--transition-fast);
    text-decoration: none;
}

.btn-primary:hover {
    opacity: 0.9;
    transform: translateY(-1px);
}

.btn-primary:focus-visible {
    outline: 2px solid var(--primary);
    outline-offset: 2px;
    border-radius: var(--radius-md);
}

.btn-secondary {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 14px 28px;
    background: var(--surface);
    color: var(--text);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    font-family: inherit;
    font-weight: 500;
    font-size: 1rem;
    cursor: pointer;
    transition: border-color var(--transition-fast);
    text-decoration: none;
}

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

.btn-secondary:focus-visible {
    outline: 2px solid var(--primary);
    outline-offset: 2px;
    border-radius: var(--radius-md);
}

.section-title {
    font-size: clamp(2rem, 3.5vw, 3rem);
    font-weight: 600;
    color: var(--text);
    letter-spacing: -0.01em;
}


/* ===================================
   Header
   =================================== */

header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    width: 100%;
    z-index: 100;
    background-color: rgba(15, 10, 16, 0.85);
    -webkit-backdrop-filter: blur(20px);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border);
}

#nav-bar {
    display: flex;
    flex-direction: row;
    justify-content: space-between;
    align-items: center;
    max-width: var(--content-width);
    height: 72px;
    margin: 0 auto;
    padding: 0 var(--content-padding);
}

.head-title {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text);
    text-decoration: none;
    letter-spacing: -0.01em;
}

#nav-bar nav ul {
    display: flex;
    flex-direction: row;
    gap: 40px;
    align-items: center;
    list-style: none;
}

#nav-bar nav ul li {
    display: flex;
    align-items: center;
}

.nav-item {
    font-size: 1rem;
    font-weight: 500;
    color: var(--text-secondary);
    text-decoration: none;
    padding: 10px 4px;
    min-height: 44px;
    display: flex;
    align-items: center;
    transition: color var(--transition-fast);
}

.nav-item:hover {
    color: var(--text);
}

.nav-item:focus-visible {
    outline: 2px solid var(--primary);
    outline-offset: 2px;
    border-radius: var(--radius-sm);
}

.lang-switch {
    display: flex;
    flex-direction: row;
    gap: 4px;
    margin-left: 8px;
}

.lang-switch a {
    cursor: pointer;
    font-size: 0.8125rem;
    font-weight: 500;
    color: var(--text-muted);
    padding: 10px 12px;
    min-height: 44px;
    min-width: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-sm);
    transition: color var(--transition-fast), background-color var(--transition-fast);
}

.lang-switch a:hover {
    color: var(--text-secondary);
}

.lang-switch .selected-lang {
    color: var(--text);
    background-color: var(--surface);
}


/* Mobile Menu */

.mobile-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    display: none;
    align-items: center;
    justify-content: space-between;
    height: 56px;
    padding: 0 var(--content-padding);
    z-index: 110;
    background-color: rgba(15, 10, 16, 0.85);
    -webkit-backdrop-filter: blur(20px);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border);
}

.mobile-header__title {
    font-size: 1.125rem;
    font-weight: 700;
    color: var(--text);
    text-decoration: none;
}

#mobile-menu {
    display: none;
    flex-direction: column;
    justify-content: center;
    gap: 6px;
    width: 48px;
    height: 48px;
    padding: 12px;
    cursor: pointer;
    z-index: 110;
    border-radius: var(--radius-sm);
    transition: background-color var(--transition-fast);
}

#mobile-menu:hover {
    background-color: var(--surface);
}

#mobile-menu hr {
    width: 24px;
    height: 3px;
    background-color: var(--text);
    border: none;
    border-radius: 2px;
    transition: transform var(--transition-base), opacity var(--transition-base);
}

.mobile-menu-shown hr:first-of-type {
    transform: translateY(9px) rotate(-45deg);
}

.mobile-menu-shown hr:nth-of-type(2) {
    opacity: 0;
}

.mobile-menu-shown hr:last-of-type {
    transform: translateY(-9px) rotate(45deg);
}

@media only screen and (max-width: 768px) {
    header {
        height: 56px;
    }

    main {
        padding-top: 56px;
    }

    .mobile-header {
        position: relative;
        display: flex;
        height: 100%;
        background-color: transparent;
        -webkit-backdrop-filter: none;
        backdrop-filter: none;
        border-bottom: none;
    }

    #mobile-menu {
        display: flex;
    }

    #nav-bar {
        position: fixed;
        inset: 0;
        display: flex;
        flex-direction: column;
        justify-content: center;
        align-items: center;
        gap: 48px;
        width: 100vw;
        height: 100vh;
        max-width: none;
        background-color: rgba(15, 10, 16, 0.97);
        -webkit-backdrop-filter: blur(20px);
        backdrop-filter: blur(20px);
        opacity: 0;
        pointer-events: none;
        transition: opacity var(--transition-base);
        z-index: 105;
    }

    #nav-bar.nav-shown {
        opacity: 1;
        pointer-events: auto;
    }

    #nav-bar nav ul {
        flex-direction: column;
        gap: 32px;
    }

    .nav-item {
        font-size: 1.25rem;
    }

    .lang-switch {
        margin-left: 0;
        gap: 8px;
    }

    .lang-switch a {
        font-size: 1rem;
        padding: 8px 16px;
    }
}


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

footer {
    background-color: var(--bg-soft);
    border-top: 1px solid var(--border);
}

.footer__inner {
    display: flex;
    flex-direction: row;
    justify-content: space-between;
    max-width: var(--content-width);
    margin: 0 auto;
    padding: var(--space-3xl) var(--content-padding) var(--space-xl);
}

.footer-left-container {
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    gap: var(--space-md);
}

.footer-text-container {
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
    max-width: 320px;
}

.footer-title {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text);
}

.footer-description {
    font-size: 0.9375rem;
    color: var(--text-muted);
    line-height: 1.5;
}

.footer-right-container {
    display: flex;
    flex-direction: row;
    gap: 80px;
}

.footer-link-title {
    font-size: 0.8125rem;
    font-weight: 600;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.08em;
    margin-bottom: var(--space-md);
}

.footer-links-container {
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
}

.footer-links-container a {
    font-size: 0.9375rem;
    color: var(--text-muted);
    text-decoration: none;
    padding: 6px 0;
    transition: color var(--transition-fast);
}

.footer-links-container a:hover {
    color: var(--text);
}

.footer-links-container a:focus-visible {
    outline: 2px solid var(--primary);
    outline-offset: 2px;
    border-radius: 2px;
}

@media only screen and (max-width: 768px) {
    .footer__inner {
        flex-direction: column;
        gap: var(--space-xl);
        padding: var(--space-2xl) var(--content-padding) var(--space-xl);
    }

    .footer-text-container {
        max-width: none;
    }

    .footer-right-container {
        flex-direction: column;
        gap: var(--space-xl);
    }
}


/* ===================================
   FAQ Component (shared)
   =================================== */

.faq__list {
    display: flex;
    flex-direction: column;
}

.faq__item {
    border-bottom: 1px solid var(--border);
}

.faq__trigger {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: var(--space-md);
    width: 100%;
    padding: var(--space-lg) 0;
    cursor: pointer;
    user-select: none;
    background: none;
    border: none;
    font-family: inherit;
    text-align: left;
    color: inherit;
}

.faq__trigger:focus-visible {
    outline: 2px solid var(--primary);
    outline-offset: 2px;
    border-radius: var(--radius-sm);
}

.faq__question {
    font-size: 1.1875rem;
    font-weight: 500;
    color: var(--text);
    line-height: 1.4;
}

.faq__icon {
    flex-shrink: 0;
    width: 20px;
    height: 20px;
    color: var(--text-muted);
    transition: transform var(--transition-base), color var(--transition-fast);
}

.faq__item--open .faq__icon {
    transform: rotate(45deg);
    color: var(--primary);
}

.faq__answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height var(--transition-base), padding-bottom var(--transition-base);
}

.faq__item--open .faq__answer {
    max-height: 2000px;
    padding-bottom: var(--space-lg);
}

.faq__answer p {
    font-size: 1.0625rem;
    color: var(--text-secondary);
    line-height: 1.6;
}

.faq__answer p + p {
    margin-top: var(--space-sm);
}

.faq__answer img {
    margin: var(--space-md) 0;
    border-radius: var(--radius-md);
    border: 1px solid var(--border);
}

.faq__answer a {
    color: var(--primary);
    text-decoration: underline;
    text-underline-offset: 2px;
    text-decoration-color: rgba(255, 77, 103, 0.4);
}

.faq__answer a:hover {
    text-decoration-color: var(--primary);
}


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

.reveal {
    opacity: 0;
    transform: translateY(24px);
    transition: opacity var(--transition-slow), transform var(--transition-slow);
}

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

@media (prefers-reduced-motion: reduce) {
    .reveal {
        opacity: 1;
        transform: none;
        transition: none;
    }

    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        transition-duration: 0.01ms !important;
    }
}