:root {
    --bg: #0f0b08;
    --bg-glow-1: rgba(212, 165, 116, 0.16);      /* Warm amber glow (top-left) */
    --bg-glow-2: rgba(180, 120, 130, 0.18);      /* Dusty rose glow (top-right) */
    --card: #1a1410;
    --card-2: #15100c;
    --card-3: #120d09;
    --border: #2a2118;
    --border-strong: #3d3127;
    --text: #f0e6dc;
    --text-strong: #fff8f0;
    --muted: #a89a8a;
    --accent: #d4a574;
    --accent-strong: #e8c49a;
    --accent-soft: rgba(212, 165, 116, 0.18);
    --warning: #f2c65b;
    --success: #7dba6a;
    --danger: #e07b6b;
    --shadow: 0 24px 60px rgba(10, 6, 3, 0.5);
    --shadow-soft: 0 16px 34px rgba(10, 6, 3, 0.4);
}

html {
    scroll-behavior: smooth;
}

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

body {
    margin: 0;
    font-family: 'IBM Plex Sans', sans-serif;
    color: var(--text);
    background-color: var(--bg);
    background-image: radial-gradient(1200px 700px at 10% -10%, var(--bg-glow-1), transparent 60%),
    radial-gradient(900px 600px at 90% 0%, var(--bg-glow-2), transparent 55%),
    linear-gradient(180deg, #0f0b08 0%, #120d09 60%, #0f0b08 100%);
    background-attachment: fixed;
}

section {
    scroll-margin-top: 120px;
}

h1, h2, h3, h4, h5 {
    font-family: 'Space Grotesk', sans-serif;
    color: var(--text-strong);
    letter-spacing: 0.2px;
}

a {
    color: var(--accent);
    text-decoration: none;
    transition: color 0.2s ease;
}

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

::selection {
    background: rgba(212, 165, 116, 0.35);
}

.section-card {
    background: linear-gradient(180deg, rgba(26, 20, 16, 0.92), rgba(18, 13, 9, 0.98));
}

.nav-shell {
    background: rgba(18, 13, 9, 0.82);
}

.nav-pill:hover,
.nav-pill:focus {
    color: var(--text-strong);
    background: rgba(212, 165, 116, 0.16);
}

.btn-pill {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 6px 12px;
    border-radius: 999px;
    border: 1px solid var(--border);
    background: rgba(212, 165, 116, 0.08);
    color: var(--text);
    font-size: 0.85rem;
    transition: background 0.2s ease, border-color 0.2s ease, color 0.2s ease;
}

.btn-pill:hover,
.btn-pill:focus {
    color: var(--text-strong);
    background: rgba(212, 165, 116, 0.2);
    border-color: rgba(212, 165, 116, 0.45);
}

.bibtex-toggle {
    cursor: pointer;
}

.bibtex-toggle.is-open {
    color: var(--text-strong);
    background: rgba(212, 165, 116, 0.2);
    border-color: rgba(212, 165, 116, 0.45);
}

.chip {
    display: inline-flex;
    align-items: center;
    padding: 2px 8px;
    border-radius: 999px;
    background: rgba(212, 165, 116, 0.18);
    color: var(--text-strong);
    font-size: 0.75rem;
}

img.avatar {
    border-radius: 999px;
    border: 1px solid var(--border);
    box-shadow: 0 0 0 6px rgba(212, 165, 116, 0.1), var(--shadow-soft);
}

/* Google Maps - Dark Brown Theme */
#gmap_iframe {
    width: 100%;
    height: 100%;
    border: none;

    /* Dark-brown/sepia filter effect */
    filter:
            invert(88%)
            hue-rotate(340deg)
            saturate(0.7)
            brightness(0.75)
            contrast(1.2)
            sepia(0.15);
}