/* ========================================
   SHARED DESIGN SYSTEM
   Used by index.html and pro-info.html
   ======================================== */

:root {
    --color-bg-body: #E8E8E8;
    --color-bg-main: #FFFFFF;
    --color-header-bg: #000000;
    --color-text-primary: rgba(18, 18, 18, 1.0);
    --color-text-secondary: rgba(18, 18, 18, 0.8);
    --color-text-tertiary: rgba(18, 18, 18, 0.6);
    --color-text-quaternary: rgba(18, 18, 18, 0.3);
    --color-accent: #80DEEA;
    --color-accent-hover: #39abba;
    --color-border: rgba(18, 18, 18, 0.1);
    --color-white: #FFFFFF;
    --color-black: #000000;
    --header-padding-y: 12px;
    --header-padding-x: 40px;
    --main-padding-x: 40px;
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: var(--color-bg-body);
    color: var(--color-text-secondary);
    line-height: 1.4;
}

/* ========================================
   HEADER
   ======================================== */

header {
    background: var(--color-header-bg);
    border-bottom: 1px solid var(--color-border);
    padding: var(--header-padding-y) var(--header-padding-x);
    position: relative;
    z-index: 100;
}

header.sticky-active {
    position: fixed;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 960px;
    max-width: calc(100% - 80px);
    margin: 0;
    box-sizing: border-box;
}

.header-content {
    max-width: 960px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 16px;
}

h1 {
    font-size: 20px;
    font-weight: 700;
    color: var(--color-white);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

h1 a {
    color: inherit;
    text-decoration: none;
}

h1 span {
    color: var(--color-accent);
}

.back-link {
    font-size: 12px;
    color: rgba(255, 255, 255, 0.6);
    text-decoration: none;
    text-transform: uppercase;
    letter-spacing: 0.07em;
}

.back-link:hover {
    color: var(--color-white);
}

.launch-btn {
    background: var(--color-accent);
    color: var(--color-black);
    border: none;
    padding: 8px 16px;
    border-radius: 8px;
    font-size: 13px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.07em;
    cursor: pointer;
    text-decoration: none;
    display: inline-block;
    transition: background 0.15s, color 0.15s;
}

.launch-btn:hover {
    background: #f1f1f1;
    color: var(--color-accent-hover);
}

.launch-btn:active {
    transform: scale(0.95);
}

/* ========================================
   TYPOGRAPHY
   ======================================== */

h2 {
    font-size: 15px;
    font-weight: 700;
    color: var(--color-text-primary);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin-bottom: 16px;
}

h3 {
    font-size: 15px;
    font-weight: 700;
    color: var(--color-text-primary);
    margin-top: 24px;
    margin-bottom: 8px;
}

p {
    font-size: 16px;
    color: var(--color-text-secondary);
    margin-bottom: 14px;
    max-width: 640px;
}

.highlight {
    color: var(--color-text-primary);
    font-weight: 600;
}

/* Inline text links within body copy (not buttons/nav) */
p a,
li a {
    color: var(--color-accent-hover);
    font-weight: 600;
    text-decoration: none;
    transition: color 0.15s;
}

p a:hover,
li a:hover {
    color: var(--color-text-primary);
    text-decoration: underline;
}

/* ========================================
   FOOTER
   ======================================== */

footer {
    background: var(--color-bg-main);
    border-top: 1px solid var(--color-border);
    max-width: 960px;
    margin: 0 auto;
    padding: 40px var(--main-padding-x);
}

.footer-content {
    text-align: center;
}

.footer-links {
    display: flex;
    flex-wrap: wrap;
    gap: 24px;
    margin-bottom: 20px;
    justify-content: center;
}

.footer-links a {
    font-size: 12px;
    color: var(--color-text-tertiary);
    text-decoration: none;
    text-transform: uppercase;
    letter-spacing: 0.07em;
    transition: color 0.15s;
}

.footer-links a:hover {
    color: #007A8A;
}

.footer-meta {
    font-size: 11px;
    color: var(--color-text-quaternary);
    padding-top: 20px;
    border-top: 1px solid var(--color-border);
}

/* ========================================
   SHARED RESPONSIVE
   ======================================== */

@media (max-width: 480px) {
    :root {
        --header-padding-y: 8px;
        --header-padding-x: 16px;
        --main-padding-x: 16px;
    }

    h1 {
        font-size: 16px;
    }

    header.sticky-active {
        max-width: 100%;
    }

    .footer-links {
        flex-direction: column;
        align-items: center;
        gap: 16px;
    }
}