/* Light-brown aesthetic theme for BookTrack */
/* Palette */
:root {
    --bt-bg: #f7f1ea;         /* light parchment */
    --bt-card: #fffaf5;       /* soft paper */
    --bt-accent: #b07c4f;     /* light brown (buttons/links) */
    --bt-accent-600: #96653e; /* darker hover */
    --bt-accent-700: #7e5333; /* active */
    --bt-text: #4a3b2f;       /* deep brown */
    --bt-muted: #8b6f57;      /* muted */
    --bt-border: #e6d8c9;     /* subtle border */
    --bt-input-bg: #fffdfb;   /* inputs */
}

html, body {
    height: 100%;
}

body.bt-theme {
    background: radial-gradient(1200px 800px at 20% -10%, #ffffff 0%, var(--bt-bg) 60%), var(--bt-bg);
    color: var(--bt-text);
}

/* Centering helper */
.bt-center {
    min-height: 100dvh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 24px;
}

/* Card */
.bt-card {
    background: var(--bt-card);
    border: 1px solid var(--bt-border);
    border-radius: 16px;
    box-shadow: 0 10px 30px rgba(124, 92, 66, 0.08);
}

.bt-card .bt-header {
    display: flex;
    flex-direction: column;
    gap: 6px;
    text-align: center;
}

.bt-brand {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    font-weight: 700;
    color: var(--bt-text);
    text-decoration: none;
}

.bt-brand-mark {
    width: 36px;
    height: 36px;
    border-radius: 8px;
    background: linear-gradient(160deg, var(--bt-accent), var(--bt-accent-600));
    display: inline-grid;
    place-items: center;
    color: #fff;
    font-size: 18px;
    box-shadow: 0 6px 16px rgba(176, 124, 79, 0.35);
}

.bt-title {
    font-weight: 700;
    letter-spacing: 0.2px;
}

.bt-subtitle {
    color: var(--bt-muted);
}

/* Name grid tweaks */
.bt-name-grid .form-label {
    white-space: nowrap;
}

.bt-name-grid .form-control {
    text-overflow: ellipsis;
}

/* Inputs */
.form-control.bt-input {
    background: var(--bt-input-bg);
    border: 1px solid var(--bt-border);
    color: var(--bt-text);
    padding: 10px 12px;
    border-radius: 10px;
}

.form-control.bt-input:focus {
    border-color: var(--bt-accent);
    box-shadow: 0 0 0 0.2rem rgba(176, 124, 79, 0.15);
}

/* Buttons */
.btn-bt {
    --bs-btn-color: #fff;
    --bs-btn-bg: var(--bt-accent);
    --bs-btn-border-color: var(--bt-accent);
    --bs-btn-hover-bg: var(--bt-accent-600);
    --bs-btn-hover-border-color: var(--bt-accent-600);
    --bs-btn-active-bg: var(--bt-accent-700);
    --bs-btn-active-border-color: var(--bt-accent-700);
    --bs-btn-disabled-bg: #caa988;
    --bs-btn-disabled-border-color: #caa988;
    border-radius: 10px;
    padding: 10px 14px;
}

/* Links */
.bt-link {
    color: var(--bt-accent);
    text-decoration: none;
}

.bt-link:hover {
    color: var(--bt-accent-600);
    text-decoration: underline;
}

/* Subtle divider */
.bt-divider {
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--bt-border), transparent);
}

/* Helper for small muted text */
.bt-muted {
    color: var(--bt-muted);
}

/* Background image hero (optional use) */
.bt-hero-bg {
    background-image: url('../img/Background.jpg');
    background-size: cover;
    background-position: center;
}