/* ============================================
   Proud North — Brand Tokens
   ============================================ */
:root {
    --pn-gold: #FFD700;
    --pn-gold-hover: #e6c200;
    --pn-dark: #383838;
    --pn-black: #000;
    --pn-white: #fff;
    --pn-offwhite: #F4F3ED;
    --pn-border: #e0dfd9;
    --pn-muted: #8a8880;
    --pn-font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
}

/* ============================================
   Base
   ============================================ */
body {
    font-family: var(--pn-font);
    color: var(--pn-dark);
    background: var(--pn-offwhite);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

main {
    flex: 1;
}

/* ============================================
   Navbar
   ============================================ */
.navbar-pn {
    background: var(--pn-black);
    padding: 0.75rem 0;
}

.navbar-pn .navbar-brand {
    text-decoration: none;
    padding: 0;
}

.brand-logo {
    height: 2.25rem;
    width: auto;
}

.brand-name {
    color: var(--pn-white);
    font-weight: 600;
    font-size: 1.05rem;
    letter-spacing: -0.01em;
    line-height: 1.2;
}

.brand-thin {
    font-weight: 400;
    opacity: 0.6;
}

/* ============================================
   Hero
   ============================================ */
.hero-section {
    padding: 1rem 0 0;
}

.hero-title {
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--pn-black);
    letter-spacing: -0.02em;
    margin-bottom: 0.5rem;
}

.hero-subtitle {
    color: var(--pn-muted);
    font-size: 1rem;
    max-width: 38rem;
    margin: 0 auto;
    line-height: 1.6;
}

/* ============================================
   Footer
   ============================================ */
.footer-pn {
    background: var(--pn-black);
    color: var(--pn-muted);
    padding: 1rem 0;
    margin-top: 2rem;
}

/* ============================================
   Buttons — Proud North
   ============================================ */
.btn-pn {
    background: var(--pn-dark);
    color: var(--pn-white);
    border: 1px solid var(--pn-dark);
    font-weight: 600;
    letter-spacing: 0.02em;
    text-transform: uppercase;
    font-size: 0.8rem;
    padding: 0.5rem 1.25rem;
    transition: background 0.15s, border-color 0.15s;
}

.btn-pn:hover,
.btn-pn:focus {
    background: var(--pn-gold);
    border-color: var(--pn-gold);
    color: var(--pn-black);
}

.btn-pn:disabled {
    background: var(--pn-border);
    border-color: var(--pn-border);
    color: var(--pn-muted);
}

.btn-pn-outline {
    background: transparent;
    color: var(--pn-dark);
    border: 1px solid var(--pn-dark);
    font-weight: 600;
    letter-spacing: 0.02em;
    text-transform: uppercase;
    font-size: 0.8rem;
    padding: 0.5rem 1.25rem;
    transition: background 0.15s, border-color 0.15s, color 0.15s;
}

.btn-pn-outline:hover,
.btn-pn-outline:focus {
    background: var(--pn-dark);
    color: var(--pn-white);
}

/* Resolution toggle buttons */
.btn-pn-toggle {
    background: var(--pn-white);
    color: var(--pn-dark);
    border: 1px solid var(--pn-border);
    font-size: 0.8rem;
    font-weight: 500;
    padding: 0.4rem 0.75rem;
    transition: background 0.15s, border-color 0.15s, color 0.15s;
}

.btn-pn-toggle:hover {
    border-color: var(--pn-dark);
}

.btn-check:checked + .btn-pn-toggle {
    background: var(--pn-dark);
    color: var(--pn-white);
    border-color: var(--pn-dark);
}

/* ============================================
   Drop Zone
   ============================================ */
.drop-zone {
    border: 2px dashed var(--pn-border);
    border-radius: 0.5rem;
    padding: 3rem 1rem;
    text-align: center;
    cursor: pointer;
    background: var(--pn-white);
    transition: border-color 0.2s, background-color 0.2s;
}

.drop-zone.drag-over {
    border-color: var(--pn-gold);
    background-color: #fffdf0;
}

.drop-zone-icon {
    color: var(--pn-muted);
}

.drop-zone-content {
    pointer-events: none;
}

.drop-zone-content button {
    pointer-events: auto;
}

/* ============================================
   Thumbnail Grid
   ============================================ */
.thumbnail-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
    gap: 1rem;
}

/* Thumbnail Card */
.thumbnail-card {
    position: relative;
    border: 1px solid var(--pn-border);
    border-radius: 0.375rem;
    overflow: hidden;
    background: var(--pn-white);
    cursor: grab;
    transition: box-shadow 0.15s;
}

.thumbnail-card:hover {
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

.thumbnail-card:active {
    cursor: grabbing;
}

.thumbnail-card img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}

.thumbnail-card .slide-number {
    position: absolute;
    top: 0.375rem;
    left: 0.375rem;
    background: var(--pn-dark);
    color: var(--pn-white);
    font-size: 0.7rem;
    font-weight: 700;
    width: 1.5rem;
    height: 1.5rem;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    line-height: 1;
}

.thumbnail-card .btn-remove {
    position: absolute;
    top: 0.375rem;
    right: 0.375rem;
    background: var(--pn-dark);
    color: var(--pn-white);
    border: none;
    width: 1.5rem;
    height: 1.5rem;
    border-radius: 50%;
    font-size: 0.875rem;
    line-height: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    opacity: 0;
    transition: opacity 0.15s;
    padding: 0;
}

.thumbnail-card:hover .btn-remove {
    opacity: 1;
}

.thumbnail-card .btn-remove:hover {
    background: #c53030;
}

/* SortableJS ghost */
.sortable-ghost {
    opacity: 0.35;
}

.sortable-chosen {
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

/* Aspect ratio classes for preview */
.thumbnail-card.ratio-square { aspect-ratio: 1 / 1; }
.thumbnail-card.ratio-portrait { aspect-ratio: 4 / 5; }
.thumbnail-card.ratio-landscape { aspect-ratio: 16 / 9; }

/* ============================================
   Utilities
   ============================================ */
.upload-overlay {
    position: fixed;
    inset: 0;
    background: rgba(244, 243, 237, 0.9);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1050;
}

/* ============================================
   Responsive
   ============================================ */
@media (max-width: 576px) {
    .thumbnail-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}