/* ============================================================
   DESIGN SYSTEM — BLNKBooks
   Shared CSS variables and base classes for site-wide consistency.
   Include BEFORE page-specific styles on every page.
   ============================================================ */

/* === DESIGN TOKENS === */
:root {
    /* Brand colors */
    --ink: #1F1F1F;
    --paper: #F6F4EF;
    --pencil: #e8e4dd;
    --coral: #FF6B6B;
    --coral-dark: #e55555;
    --coral-light: #fff0f0;
    --sky: #4D9DE0;
    --sage: #63C7B2;
    --golden: #F4B942;
    --lavender: #9b8ec4;
    --warm: #f5e6c8;
    --muted: #555555;
    --subdued: #888888;
    --faint: #aaaaaa;

    /* Spacing scale (8px base) */
    --space-xs: 4px;
    --space-sm: 8px;
    --space-md: 16px;
    --space-lg: 24px;
    --space-xl: 32px;
    --space-2xl: 48px;
    --space-3xl: 64px;
    --space-4xl: 80px;
    --space-5xl: 100px;

    /* Border radius */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 20px;
    --radius-pill: 9999px;

    /* Shadows */
    --shadow-sm: 0 2px 8px rgba(0,0,0,0.06);
    --shadow-md: 0 4px 20px rgba(0,0,0,0.08);
    --shadow-lg: 0 8px 32px rgba(0,0,0,0.10);
    --shadow-xl: 0 16px 48px rgba(0,0,0,0.14);
    --shadow-coral: 0 4px 16px rgba(255,107,107,0.25);

    /* Container widths */
    --container-sm: 700px;
    --container-md: 900px;
    --container-lg: 1200px;
    --container-nav: 1400px;

    /* Typography */
    --font-heading: 'Space Grotesk', sans-serif;
    --font-body: 'DM Sans', sans-serif;

    /* Section padding */
    --section-y: 100px;
    --section-x: 40px;
    --section-y-mobile: 64px;
    --section-x-mobile: 20px;

    /* Card padding */
    --card-padding: 32px;
    --card-padding-compact: 24px;
    --card-padding-mobile: 24px;

    /* Form inputs */
    --input-border: 1.5px solid var(--pencil);
    --input-radius: var(--radius-md);
    --input-padding: 13px 16px;
    --input-focus-shadow: 0 0 0 3px rgba(255,107,107,0.12);
}

/* === BASE RESET === */
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }

html { overflow-x: hidden; }

body {
    font-family: var(--font-body);
    background: var(--paper);
    color: var(--ink);
    overflow-x: clip;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

h1, h2, h3, h4, h5, h6 { font-family: var(--font-heading); }

a { color: var(--sky); text-decoration: none; }
a:hover { color: var(--coral); }

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

/* === BUTTONS === */
.btn-primary {
    background: var(--coral);
    color: white;
    border: none;
    padding: 16px 36px;
    border-radius: var(--radius-md);
    font-family: var(--font-heading);
    font-weight: 600;
    font-size: 18px;
    cursor: pointer;
    transition: all 0.2s;
    text-decoration: none;
    display: inline-block;
    line-height: 1.4;
}
.btn-primary:hover {
    background: var(--coral-dark);
    color: white;
    transform: translateY(-1px);
    box-shadow: var(--shadow-coral);
}

.btn-secondary {
    background: transparent;
    color: var(--ink);
    border: 2px solid var(--pencil);
    padding: 14px 32px;
    border-radius: var(--radius-md);
    font-family: var(--font-heading);
    font-weight: 600;
    font-size: 18px;
    cursor: pointer;
    transition: all 0.2s;
    text-decoration: none;
    display: inline-block;
    line-height: 1.4;
}
.btn-secondary:hover {
    border-color: var(--ink);
    color: var(--ink);
}

.btn-sm {
    padding: 10px 22px;
    font-size: 15px;
    border-radius: var(--radius-sm);
}

/* === CARDS === */
.ds-card {
    background: white;
    border: 1px solid var(--pencil);
    border-radius: var(--radius-lg);
    padding: var(--card-padding);
    box-shadow: var(--shadow-sm);
    transition: box-shadow 0.3s, border-color 0.3s;
}
.ds-card:hover {
    box-shadow: var(--shadow-md);
}

/* === SECTION LABELS === */
.section-label {
    font-family: var(--font-heading);
    font-weight: 600;
    font-size: 13px;
    text-transform: uppercase;
    letter-spacing: 3px;
    color: var(--coral);
    margin-bottom: var(--space-md);
}

/* === FORM INPUTS === */
.ds-input {
    width: 100%;
    padding: var(--input-padding);
    border: var(--input-border);
    border-radius: var(--input-radius);
    font-family: var(--font-body);
    font-size: 16px;
    color: var(--ink);
    background: white;
    transition: border-color 0.2s, box-shadow 0.2s;
    outline: none;
}
.ds-input:focus {
    border-color: var(--coral);
    box-shadow: var(--input-focus-shadow);
}
.ds-input::placeholder {
    color: var(--faint);
}

.ds-label {
    display: block;
    font-family: var(--font-heading);
    font-size: 13px;
    font-weight: 600;
    color: var(--muted);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 6px;
}

.ds-textarea {
    width: 100%;
    padding: var(--input-padding);
    border: var(--input-border);
    border-radius: var(--input-radius);
    font-family: var(--font-body);
    font-size: 16px;
    color: var(--ink);
    background: white;
    transition: border-color 0.2s, box-shadow 0.2s;
    outline: none;
    resize: vertical;
    min-height: 120px;
}
.ds-textarea:focus {
    border-color: var(--coral);
    box-shadow: var(--input-focus-shadow);
}

/* === FOOTER (shared) === */
.ds-footer {
    background: var(--ink);
    color: rgba(255,255,255,0.6);
    padding: 40px var(--section-x);
    text-align: center;
    font-size: 14px;
}
.ds-footer a {
    color: rgba(255,255,255,0.6);
    text-decoration: none;
    transition: color 0.2s;
}
.ds-footer a:hover {
    color: white;
}
.ds-footer .footer-links {
    display: flex;
    justify-content: center;
    gap: var(--space-lg);
    margin-top: var(--space-md);
    flex-wrap: wrap;
}

/* === PAGE WRAPPER (for content pages) === */
.page-wrapper {
    max-width: var(--container-md);
    margin: 0 auto;
    padding: var(--space-2xl) var(--section-x) var(--space-4xl);
}

.page-wrapper-narrow {
    max-width: var(--container-sm);
    margin: 0 auto;
    padding: var(--space-2xl) var(--section-x) var(--space-4xl);
}

.page-wrapper-wide {
    max-width: var(--container-lg);
    margin: 0 auto;
    padding: var(--space-2xl) var(--section-x) var(--space-4xl);
}

/* === RESPONSIVE === */
@media (max-width: 768px) {
    :root {
        --section-y: var(--section-y-mobile);
        --section-x: var(--section-x-mobile);
        --card-padding: var(--card-padding-mobile);
    }

    .page-wrapper,
    .page-wrapper-narrow,
    .page-wrapper-wide {
        padding: var(--space-xl) var(--section-x-mobile) var(--space-3xl);
    }

    .btn-primary {
        padding: 14px 28px;
        font-size: 16px;
    }

    .btn-secondary {
        padding: 12px 24px;
        font-size: 16px;
    }

    .ds-footer {
        padding: 32px var(--section-x-mobile);
    }

    .ds-footer .footer-links {
        gap: var(--space-md);
    }
}

@media (max-width: 480px) {
    .btn-primary {
        padding: 13px 24px;
        font-size: 15px;
        width: 100%;
        text-align: center;
    }

    .btn-secondary {
        padding: 11px 20px;
        font-size: 15px;
        width: 100%;
        text-align: center;
    }
}

/* === ICON SYSTEM (Lucide-style SVG icons) === */
/* All icons use consistent stroke-width: 2, sizing: 20px or 24px */
.icon {
    display: inline-block;
    vertical-align: middle;
    flex-shrink: 0;
    width: 20px;
    height: 20px;
}

.icon-lg {
    width: 24px;
    height: 24px;
}

.icon-sm {
    width: 16px;
    height: 16px;
}

.icon-xl {
    width: 32px;
    height: 32px;
}

/* Icon colors — use brand colors only */
.icon-primary { color: var(--coral); }
.icon-secondary { color: var(--sky); }
.icon-accent { color: var(--sage); }
.icon-muted { color: var(--subdued); }
.icon-light { color: var(--faint); }

/* Icon in button — adjust for visual balance */
.btn-primary .icon,
.btn-secondary .icon {
    margin-right: 8px;
}

/* Empty state icon container */
.empty-icon-container {
    width: 64px;
    height: 64px;
    margin: 0 auto 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-lg);
    background: var(--pencil);
}

.empty-icon-container .icon {
    width: 40px;
    height: 40px;
    color: var(--subdued);
}