/* ============================================================
   Recipe Companion — Theme System
   All colors reference CSS custom properties defined here.
   To swap themes: change the values in :root (or add a
   data-theme attribute variant below).
   ============================================================ */

:root {
    /* --- Primary palette --- */
    --color-primary:        #C1603C;  /* Terracotta — CTAs, active states */
    --color-primary-hover:  #A84F2F;  /* Darker terracotta for hover */
    --color-primary-light:  #F5E8E2;  /* Very light terracotta tint — pill backgrounds */

    /* --- Secondary palette --- */
    --color-secondary:      #7A8C5E;  /* Warm olive — tags, secondary actions */
    --color-secondary-hover:#647549;
    --color-secondary-light:#EEF1E8;

    /* --- Surface & background --- */
    --color-bg:             #FAF6F0;  /* Cream — page background */
    --color-surface:        #FFFFFF;  /* Cards, modals, inputs */
    --color-surface-raised: #FFFFFF;  /* Elevated cards (same for now) */

    /* --- Text --- */
    --color-text:           #2C1A0E;  /* Dark brown — headings, body */
    --color-text-muted:     #8C7B6E;  /* Warm gray — meta, labels, placeholders */
    --color-text-on-primary:#FFFFFF;  /* Text on primary-colored backgrounds */

    /* --- Borders & dividers --- */
    --color-border:         #E8DDD4;  /* Light sand */
    --color-border-focus:   #C1603C;  /* Primary color on focused inputs */

    /* --- Difficulty star colors --- */
    --color-difficulty-easy:   #7A8C5E;  /* Olive */
    --color-difficulty-medium: #C4922A;  /* Warm amber */
    --color-difficulty-hard:   #B94040;  /* Muted red */

    /* --- No-image placeholder pattern --- */
    --pattern-bg-color:     #EDE5DC;
    --pattern-fg-color:     #D8CBBD;

    /* --- Shadows --- */
    --shadow-card:          0 1px 3px rgba(44, 26, 14, 0.08), 0 1px 2px rgba(44, 26, 14, 0.06);
    --shadow-card-hover:    0 4px 12px rgba(44, 26, 14, 0.12), 0 2px 4px rgba(44, 26, 14, 0.08);
    --shadow-nav:           0 1px 4px rgba(44, 26, 14, 0.10);

    /* --- Spacing & radius --- */
    --radius-sm:   4px;
    --radius-md:   8px;
    --radius-lg:   12px;
    --radius-pill: 999px;

    /* --- Transition --- */
    --transition-fast: 150ms ease;
    --transition-base: 250ms ease;
}

/* ============================================================
   Base styles
   ============================================================ */

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

html {
    font-size: 16px;
    scroll-behavior: smooth;
}

body {
    background-color: var(--color-bg);
    color: var(--color-text);
    font-family: 'Inter', system-ui, -apple-system, sans-serif;
    line-height: 1.6;
    margin: 0;
    /* Bottom padding on mobile to clear the sticky bottom nav */
    padding-bottom: 72px;
}

@media (min-width: 768px) {
    body {
        padding-bottom: 0;
        padding-top: 64px; /* Clear the sticky top nav */
    }
}

a {
    color: var(--color-primary);
    text-decoration: none;
}

a:hover {
    color: var(--color-primary-hover);
}

img {
    display: block;
    max-width: 100%;
}

/* ============================================================
   No-image placeholder pattern
   Used on recipe cards when no cover photo is uploaded.
   ============================================================ */

.img-placeholder {
    background-color: var(--pattern-bg-color);
    background-image:
        repeating-linear-gradient(
            45deg,
            var(--pattern-fg-color) 0px,
            var(--pattern-fg-color) 1px,
            transparent 1px,
            transparent 50%
        );
    background-size: 12px 12px;
    width: 100%;
    height: 100%;
}

/* ============================================================
   Utility classes that reference theme tokens
   (Supplements Tailwind — use sparingly)
   ============================================================ */

.text-primary   { color: var(--color-primary); }
.text-muted     { color: var(--color-text-muted); }
.bg-surface     { background-color: var(--color-surface); }
.bg-page        { background-color: var(--color-bg); }
.border-theme   { border-color: var(--color-border); }

.btn-primary {
    background-color: var(--color-primary);
    color: var(--color-text-on-primary);
    border: none;
    border-radius: var(--radius-md);
    padding: 0.625rem 1.25rem;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: background-color var(--transition-fast);
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
}

.btn-primary:hover {
    background-color: var(--color-primary-hover);
    color: var(--color-text-on-primary);
}

.btn-secondary {
    background-color: transparent;
    color: var(--color-primary);
    border: 2px solid var(--color-primary);
    border-radius: var(--radius-md);
    padding: 0.5rem 1.25rem;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: background-color var(--transition-fast), color var(--transition-fast);
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
}

.btn-secondary:hover {
    background-color: var(--color-primary);
    color: var(--color-text-on-primary);
}

.card {
    background-color: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-card);
    overflow: hidden;
    transition: box-shadow var(--transition-base);
}

.card:hover {
    box-shadow: var(--shadow-card-hover);
}

.pill {
    display: inline-flex;
    align-items: center;
    padding: 0.25rem 0.75rem;
    border-radius: var(--radius-pill);
    font-size: 0.8125rem;
    font-weight: 500;
    white-space: nowrap;
}

.pill-primary {
    background-color: var(--color-primary-light);
    color: var(--color-primary);
}

.pill-secondary {
    background-color: var(--color-secondary-light);
    color: var(--color-secondary);
}

.pill-outline {
    background-color: transparent;
    border: 1px solid var(--color-border);
    color: var(--color-text-muted);
}

.pill-outline.active,
.pill-outline:hover {
    background-color: var(--color-primary);
    border-color: var(--color-primary);
    color: var(--color-text-on-primary);
}

/* Form inputs */
.form-input {
    width: 100%;
    padding: 0.625rem 0.875rem;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    background-color: var(--color-surface);
    color: var(--color-text);
    font-size: 1rem;
    transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
    outline: none;
}

.form-input::placeholder {
    color: var(--color-text-muted);
}

.form-input:focus {
    border-color: var(--color-border-focus);
    box-shadow: 0 0 0 3px var(--color-primary-light);
}

.form-input.error {
    border-color: #B94040;
    box-shadow: 0 0 0 3px rgba(185, 64, 64, 0.15);
}

.form-label {
    display: block;
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: 0.375rem;
}

.form-error {
    font-size: 0.8125rem;
    color: #B94040;
    margin-top: 0.25rem;
    display: none;
}

.form-error.visible {
    display: block;
}