/*
 * SynaptraAI public design system
 * Shared foundations and components for the company site and gateway pages.
 * Page-specific styles should consume these tokens instead of redefining them.
 */

:root {
    color-scheme: light;

    /* Typography */
    --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
    --font-size-body: 16px;
    --line-height-body: 1.6;

    /* Colour */
    --color-ink: #1d1d1f;
    --color-muted: #6e6e73;
    --color-subtle: #a1a1a6;
    --color-surface: #ffffff;
    --color-surface-alt: #f5f5f7;
    --color-surface-hover: #e9e9ed;
    --color-surface-active: #dedee3;
    --color-border: #d2d2d7;
    --color-border-soft: rgba(0, 0, 0, 0.1);
    --color-accent: #007aff;
    --color-accent-hover: #0056cc;
    --color-accent-soft: rgba(0, 122, 255, 0.08);
    --color-accent-border: rgba(0, 122, 255, 0.2);
    --color-on-accent: #ffffff;
    --color-success-ink: #065f46;
    --color-success-soft: #d1fae5;
    --color-success-dot: #2e9d55;
    --color-warning-ink: #92400e;
    --color-warning-soft: #fef3c7;
    --color-warning-dot: #d49a16;
    --color-danger: #a52a2a;
    --color-footer: #1d1d1f;
    --color-header: rgba(255, 255, 255, 0.9);
    --color-toggle-track: #e5e5ea;
    --color-toggle-knob: #ffffff;
    --color-toggle-icon: #6e6e73;
    --color-medical-start: #f0fdf4;
    --color-medical-end: #dcfce7;
    --color-medical-ink: #047857;
    --color-inverse-surface: #1d1d1f;
    --color-inverse-ink: #ffffff;
    --color-inverse-muted: #d2d2d7;
    --color-inverse-soft: rgba(255, 255, 255, 0.12);
    --filter-logo: none;

    /* Shape, depth, layout, and motion */
    --radius-control: 12px;
    --radius-card: 16px;
    --radius-pill: 999px;
    --shadow-card: 0 4px 20px rgba(0, 0, 0, 0.05);
    --shadow-card-hover: 0 12px 40px rgba(0, 0, 0, 0.12);
    --shadow-navbar: 0 2px 20px rgba(0, 0, 0, 0.1);
    --shadow-button: 0 8px 25px rgba(0, 122, 255, 0.25);
    --shadow-toggle: 0 1px 4px rgba(0, 0, 0, 0.22);
    --shadow-focus: 0 0 0 3px rgba(0, 122, 255, 0.18);
    --content-width: 1200px;
    --header-height: 70px;
    --page-gutter: 20px;
    --motion-fast: 180ms ease;
    --motion-standard: 300ms ease;
}

:root[data-theme="dark"] {
    color-scheme: dark;
    --color-ink: #f5f5f7;
    --color-muted: #b5b7bd;
    --color-subtle: #92949c;
    --color-surface: #111216;
    --color-surface-alt: #1b1d22;
    --color-surface-hover: #25272d;
    --color-surface-active: #30333a;
    --color-border: #454851;
    --color-border-soft: rgba(255, 255, 255, 0.14);
    --color-accent: #66b2ff;
    --color-accent-hover: #8ac5ff;
    --color-accent-soft: rgba(102, 178, 255, 0.14);
    --color-accent-border: rgba(102, 178, 255, 0.3);
    --color-on-accent: #07111c;
    --color-success-ink: #86efac;
    --color-success-soft: #173828;
    --color-success-dot: #52c77b;
    --color-warning-ink: #fcd34d;
    --color-warning-soft: #3d3015;
    --color-warning-dot: #e2aa3d;
    --color-danger: #ff8a8a;
    --color-footer: #090a0d;
    --color-header: rgba(17, 18, 22, 0.9);
    --color-toggle-track: #34363d;
    --color-toggle-knob: #f5f5f7;
    --color-toggle-icon: #c8c9ce;
    --color-medical-start: #10251a;
    --color-medical-end: #163321;
    --color-medical-ink: #86efac;
    --color-inverse-surface: #f5f5f7;
    --color-inverse-ink: #111216;
    --color-inverse-muted: #54565e;
    --color-inverse-soft: rgba(0, 0, 0, 0.1);
    --filter-logo: brightness(0) invert(1);
    --shadow-card: 0 4px 24px rgba(0, 0, 0, 0.28);
    --shadow-card-hover: 0 12px 40px rgba(0, 0, 0, 0.42);
    --shadow-navbar: 0 2px 24px rgba(0, 0, 0, 0.38);
    --shadow-button: 0 8px 25px rgba(0, 0, 0, 0.34);
    --shadow-toggle: 0 1px 5px rgba(0, 0, 0, 0.5);
}

@media (prefers-color-scheme: dark) {
    :root.theme-enabled:not([data-theme]) {
        color-scheme: dark;
        --color-ink: #f5f5f7;
        --color-muted: #b5b7bd;
        --color-subtle: #92949c;
        --color-surface: #111216;
        --color-surface-alt: #1b1d22;
        --color-surface-hover: #25272d;
        --color-surface-active: #30333a;
        --color-border: #454851;
        --color-border-soft: rgba(255, 255, 255, 0.14);
        --color-accent: #66b2ff;
        --color-accent-hover: #8ac5ff;
        --color-accent-soft: rgba(102, 178, 255, 0.14);
        --color-accent-border: rgba(102, 178, 255, 0.3);
        --color-on-accent: #07111c;
        --color-success-ink: #86efac;
        --color-success-soft: #173828;
        --color-success-dot: #52c77b;
        --color-warning-ink: #fcd34d;
        --color-warning-soft: #3d3015;
        --color-warning-dot: #e2aa3d;
        --color-danger: #ff8a8a;
        --color-footer: #090a0d;
        --color-header: rgba(17, 18, 22, 0.9);
        --color-toggle-track: #34363d;
        --color-toggle-knob: #f5f5f7;
        --color-toggle-icon: #c8c9ce;
        --color-medical-start: #10251a;
        --color-medical-end: #163321;
        --color-medical-ink: #86efac;
        --color-inverse-surface: #f5f5f7;
        --color-inverse-ink: #111216;
        --color-inverse-muted: #54565e;
        --color-inverse-soft: rgba(0, 0, 0, 0.1);
        --filter-logo: brightness(0) invert(1);
        --shadow-card: 0 4px 24px rgba(0, 0, 0, 0.28);
        --shadow-card-hover: 0 12px 40px rgba(0, 0, 0, 0.42);
        --shadow-navbar: 0 2px 24px rgba(0, 0, 0, 0.38);
        --shadow-button: 0 8px 25px rgba(0, 0, 0, 0.34);
        --shadow-toggle: 0 1px 5px rgba(0, 0, 0, 0.5);
    }
}

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

html {
    scroll-behavior: smooth;
}

body {
    margin: 0;
    min-height: 100vh;
    font-family: var(--font-sans);
    font-size: var(--font-size-body);
    line-height: var(--line-height-body);
    color: var(--color-ink);
    background: var(--color-surface);
    -webkit-font-smoothing: antialiased;
    transition: color var(--motion-fast), background-color var(--motion-fast);
}

button,
input,
select,
textarea {
    font: inherit;
}

a {
    color: inherit;
}

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

.site-container,
.container {
    width: 100%;
    max-width: var(--content-width);
    margin-inline: auto;
    padding-inline: var(--page-gutter);
}

.skip-link {
    position: fixed;
    top: 10px;
    left: 10px;
    z-index: 2000;
    padding: 10px 14px;
    border-radius: 8px;
    color: var(--color-on-accent);
    background: var(--color-accent);
    font-weight: 600;
    text-decoration: none;
    transform: translateY(-150%);
}

.skip-link:focus {
    transform: translateY(0);
}

/* Shared site header */
.site-header {
    position: fixed;
    top: 0;
    right: 0;
    left: 0;
    z-index: 1000;
    height: var(--header-height);
    border-bottom: 1px solid var(--color-border-soft);
    background: var(--color-header);
    -webkit-backdrop-filter: blur(20px);
    backdrop-filter: blur(20px);
    transition: box-shadow var(--motion-standard), background-color var(--motion-standard);
}

.site-header--scrolled {
    box-shadow: var(--shadow-navbar);
}

.site-header__inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 24px;
    max-width: var(--content-width);
    height: 100%;
    margin-inline: auto;
    padding-inline: var(--page-gutter);
}

.site-brand {
    display: inline-flex;
    flex: 0 0 auto;
    align-items: center;
    text-decoration: none;
}

.site-brand__logo,
.site-brand .logo {
    display: block;
    width: auto;
    height: 40px;
    filter: var(--filter-logo);
    transition: filter var(--motion-fast);
}

.site-nav {
    display: flex;
    align-items: center;
    gap: 40px;
    margin: 0;
    padding: 0;
    list-style: none;
}

.site-nav a {
    position: relative;
    color: var(--color-ink);
    font-size: 17px;
    font-weight: 400;
    text-decoration: none;
    transition: color var(--motion-standard);
}

.site-nav a:hover,
.site-nav a[aria-current="page"] {
    color: var(--color-accent);
}

.site-nav a[aria-current="page"]::after {
    position: absolute;
    right: 0;
    bottom: -8px;
    left: 0;
    height: 2px;
    border-radius: var(--radius-pill);
    background: currentColor;
    content: "";
}

.site-header__action {
    display: inline-flex;
    flex: 0 0 auto;
    align-items: center;
    justify-content: center;
    min-height: 38px;
    padding: 8px 16px;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-pill);
    color: var(--color-ink);
    background: transparent;
    font-size: 14px;
    line-height: 1;
    text-decoration: none;
    cursor: pointer;
    transition: color var(--motion-standard), border-color var(--motion-standard), background-color var(--motion-standard);
}

.site-header__action:hover {
    border-color: var(--color-accent);
    color: var(--color-accent);
    background: var(--color-surface-alt);
}

.site-header__actions {
    display: flex;
    flex: 0 0 auto;
    align-items: center;
    gap: 10px;
}

/* Compact light/dark switch */
.theme-toggle {
    position: relative;
    display: inline-flex;
    width: 44px;
    height: 38px;
    flex: 0 0 auto;
    align-items: center;
    padding: 0;
    border: 0;
    color: var(--color-toggle-icon);
    background: transparent;
    cursor: pointer;
}

.theme-toggle__track {
    position: relative;
    display: block;
    width: 100%;
    height: 24px;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-pill);
    background: var(--color-toggle-track);
    transition: border-color var(--motion-fast), background-color var(--motion-fast);
}

.theme-toggle:hover .theme-toggle__track {
    border-color: var(--color-accent);
}

.theme-toggle__icon {
    position: absolute;
    top: 50%;
    width: 11px;
    height: 11px;
    fill: none;
    stroke: currentColor;
    stroke-linecap: round;
    stroke-linejoin: round;
    stroke-width: 1.5;
    transform: translateY(-50%);
    transition: opacity var(--motion-fast);
}

.theme-toggle__icon--sun {
    left: 5px;
    opacity: 1;
}

.theme-toggle__icon--moon {
    right: 5px;
    opacity: 0.5;
}

.theme-toggle__thumb {
    position: absolute;
    top: 2px;
    left: 2px;
    width: 18px;
    height: 18px;
    border-radius: 50%;
    background: var(--color-toggle-knob);
    box-shadow: var(--shadow-toggle);
    transition: transform var(--motion-fast), background-color var(--motion-fast);
}

.theme-toggle[aria-checked="true"] .theme-toggle__thumb {
    transform: translateX(20px);
}

.theme-toggle[aria-checked="true"] .theme-toggle__icon--sun {
    opacity: 0.5;
}

.theme-toggle[aria-checked="true"] .theme-toggle__icon--moon {
    opacity: 1;
}

/* Shared actions */
.site-button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
    min-height: 50px;
    padding: 14px 22px;
    border: 0;
    border-radius: var(--radius-control);
    color: var(--color-on-accent);
    background: var(--color-accent);
    font-size: 17px;
    font-weight: 500;
    line-height: 1.2;
    text-decoration: none;
    cursor: pointer;
    transition: transform var(--motion-standard), box-shadow var(--motion-standard), background-color var(--motion-standard);
}

.site-button:hover {
    background: var(--color-accent-hover);
    box-shadow: var(--shadow-button);
    transform: translateY(-2px);
}

.site-button--secondary {
    border: 1px solid var(--color-accent);
    color: var(--color-accent);
    background: transparent;
}

.site-button--secondary:hover {
    color: var(--color-on-accent);
    background: var(--color-accent);
}

/* Shared footer */
.site-footer {
    padding-block: 40px;
    color: var(--color-subtle);
    background: var(--color-footer);
    text-align: center;
}

.site-footer p {
    margin: 0;
    font-size: 14px;
}

.site-footer .icp-info {
    margin-top: 0.5rem;
    color: var(--color-muted);
    font-size: 12px;
}

@media (max-width: 1024px) {
    :root {
        --page-gutter: 30px;
    }

    .site-nav {
        gap: 30px;
    }
}

@media (max-width: 768px) {
    :root {
        --header-height: 60px;
        --page-gutter: 20px;
    }

    .site-header__inner {
        gap: 16px;
    }

    .site-brand__logo,
    .site-brand .logo {
        height: 32px;
    }

    .site-nav {
        gap: 18px;
    }

    .site-nav a {
        font-size: 14px;
    }

    .site-header__action {
        min-height: 34px;
        padding: 6px 12px;
        font-size: 12px;
    }

    .site-footer {
        padding-block: 30px;
    }

    .site-footer p {
        font-size: 12px;
        line-height: 1.5;
    }
}

@media (max-width: 560px) {
    :root {
        --page-gutter: 16px;
    }

    .site-header__inner {
        gap: 10px;
    }

    .site-brand__logo,
    .site-brand .logo {
        height: 28px;
    }

    .site-nav {
        gap: 12px;
    }

    .site-nav__optional {
        display: none;
    }

    .site-header__actions {
        gap: 8px;
    }
}

@media (prefers-reduced-motion: reduce) {
    html {
        scroll-behavior: auto;
    }

    *,
    *::before,
    *::after {
        scroll-behavior: auto !important;
        transition-duration: 0.01ms !important;
    }
}