/* ============================================
   ALT Brand CSS Variables
   ============================================ */
:root {
    /* Greyscale Palette */
    --black: #1E1E1E;
    --charcoal: #2D2D2D;
    --slate: #5C5C5C;
    --steel: #8A8A8A;
    --silver: #B8B8B8;
    --mist: #E5E5E5;
    --white: #FAFAFA;

    /* Accent - Use Sparingly */
    --teal: #008080;
    --teal-light: #009999;
    --teal-dark: #006666;

    /* Light Mode (Default) */
    --bg-primary: var(--white);
    --bg-secondary: var(--mist);
    --bg-tertiary: #F0F0F0;
    --text-primary: var(--black);
    --text-secondary: var(--slate);
    --text-tertiary: var(--steel);
    --border-color: var(--silver);
    --card-bg: var(--white);
    --card-shadow: rgba(0, 0, 0, 0.08);
}

[data-theme="dark"] {
    --bg-primary: var(--black);
    --bg-secondary: var(--charcoal);
    --bg-tertiary: #171717;
    --text-primary: var(--white);
    --text-secondary: var(--steel);
    --text-tertiary: var(--silver);
    --border-color: var(--slate);
    --card-bg: var(--charcoal);
    --card-shadow: rgba(0, 0, 0, 0.3);
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Barlow', -apple-system, BlinkMacSystemFont, sans-serif;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    transition: background-color 0.3s ease, color 0.3s ease;
}

.mono {
    font-family: 'IBM Plex Mono', monospace;
}

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

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

/* ============================================
   Footer
   ============================================ */
.footer {
    background-color: var(--black);
    color: var(--silver);
    padding: 32px 48px;
    border-top: 1px solid var(--charcoal);
}

[data-theme="dark"] .footer {
    background-color: var(--charcoal);
    border-top: 1px solid var(--slate);
}

.footer-inner {
    max-width: 1200px;
    margin: 0 auto;
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 16px;
}

.footer-brand {
    display: flex;
    flex-direction: column;
}

.footer-brand .logo-mark {
    color: var(--white);
    font-size: 24px;
    font-weight: 700;
    letter-spacing: -0.02em;
}

.footer-brand .logo-subtext {
    color: var(--steel);
    font-size: 9px;
    font-weight: 500;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    margin-top: 2px;
}

.footer-links {
    display: flex;
    align-items: center;
    gap: 24px;
}

.footer-links a {
    font-size: 13px;
    color: var(--slate);
    transition: color 0.2s ease;
}

.footer-links a:hover {
    color: var(--teal-light);
}

.footer-copyright {
    width: 100%;
    text-align: center;
    font-size: 13px;
    color: var(--slate);
    margin-top: 24px;
    padding-top: 24px;
    border-top: 1px solid var(--charcoal);
}

/* ============================================
   Footer Responsive
   ============================================ */
@media (max-width: 768px) {
    .footer {
        padding: 24px 20px;
    }

    .footer-content {
        flex-direction: column;
        text-align: center;
    }

    .footer-brand {
        align-items: center;
    }

    .footer-links {
        flex-wrap: wrap;
        justify-content: center;
    }

    .footer-copyright {
        margin-top: 16px;
        padding-top: 16px;
    }
}

@media (max-width: 480px) {
    .footer {
        padding: 20px 16px;
    }
}