/* ==========================================================================
   Flightcall - Field Journal Aesthetic
   A warm, naturalist-inspired design for birding enthusiasts
   ========================================================================== */

/* Google Fonts */
@import url('https://fonts.googleapis.com/css2?family=Bitter:ital,wght@0,400;0,500;0,600;0,700;1,400&family=DM+Sans:ital,wght@0,400;0,500;0,600;0,700;1,400&display=swap');

/* ==========================================================================
   Design Tokens
   ========================================================================== */

:root {
    /* Typography */
    --font-display: 'Bitter', Georgia, serif;
    --font-body: 'DM Sans', system-ui, sans-serif;

    /* Core Colors - Naturalist Palette */
    --color-cream: #FAF6F1;
    --color-cream-dark: #F0EBE3;
    --color-parchment: #EDE8E0;

    /* Forest & Earth */
    --color-forest: #2D3E36;
    --color-forest-light: #3D5147;
    --color-moss: #4A6D5C;
    --color-sage: #7A9E8E;

    /* Warm Accents */
    --color-terracotta: #C17F59;
    --color-terracotta-dark: #A66B48;
    --color-ochre: #C9A55C;
    --color-ochre-dark: #B08F45;
    --color-rust: #A65D4E;

    /* Text Colors */
    --color-ink: #2A2520;
    --color-ink-light: #4A453E;
    --color-ink-muted: #6B665E;
    --color-ink-faint: #9B9690;

    /* Functional Colors */
    --color-arriving: #4A7C59;
    --color-peak: #C9A55C;
    --color-departing: #A65D4E;

    /* Category Colors */
    --badge-resident-bg: #2D3E36;
    --badge-resident-text: #E8EBE9;
    --badge-single-bg: #C9A55C;
    --badge-single-text: #2A2520;
    --badge-two-passage-bg: #4A6D5C;
    --badge-two-passage-text: #F0F4F2;
    --badge-vagrant-bg: #C17F59;
    --badge-vagrant-text: #FFF8F5;

    /* Borders & Shadows */
    --color-border: #DDD6CC;
    --color-border-light: #E8E3DB;
    --shadow-sm: 0 1px 3px rgba(42, 37, 32, 0.06), 0 1px 2px rgba(42, 37, 32, 0.04);
    --shadow-md: 0 4px 12px rgba(42, 37, 32, 0.08), 0 2px 4px rgba(42, 37, 32, 0.04);
    --shadow-lg: 0 12px 32px rgba(42, 37, 32, 0.12), 0 4px 8px rgba(42, 37, 32, 0.06);

    /* Spacing */
    --space-xs: 0.25rem;
    --space-sm: 0.5rem;
    --space-md: 1rem;
    --space-lg: 1.5rem;
    --space-xl: 2rem;
    --space-2xl: 3rem;

    /* Border Radius */
    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 14px;
    --radius-pill: 9999px;

    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-base: 200ms ease;
    --transition-slow: 300ms ease;
}

/* ==========================================================================
   Base Styles
   ========================================================================== */

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

body {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    background-color: var(--color-cream);
    color: var(--color-ink);
    font-family: var(--font-body);
    font-size: 16px;
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

main {
    flex: 1;
    position: relative;
}

/* ==========================================================================
   Typography
   ========================================================================== */

h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-display);
    font-weight: 600;
    line-height: 1.3;
    color: var(--color-ink);
}

h1 { font-size: 2rem; }
h2 { font-size: 1.5rem; }
h3 { font-size: 1.25rem; }

@media (min-width: 640px) {
    h1 { font-size: 2.25rem; }
    h2 { font-size: 1.75rem; }
}

/* ==========================================================================
   Header
   ========================================================================== */

header {
    background: linear-gradient(135deg, var(--color-forest) 0%, var(--color-forest-light) 100%);
    color: var(--color-cream);
    position: relative;
    overflow: hidden;
}

/* Decorative header accent */
header::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg,
        var(--color-terracotta) 0%,
        var(--color-ochre) 50%,
        var(--color-terracotta) 100%
    );
}

header h1 {
    font-family: var(--font-display);
    font-weight: 700;
    color: var(--color-cream);
    letter-spacing: -0.01em;
}

header p {
    color: var(--color-sage);
    font-size: 0.9375rem;
}

header a {
    color: var(--color-cream);
    text-decoration: none;
    transition: color var(--transition-fast);
}

header a:hover {
    color: var(--color-ochre);
}

/* Site title styling */
.site-title {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.site-title-icon {
    font-size: 1.5rem;
}

/* ==========================================================================
   Navigation
   ========================================================================== */

.nav-links {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
}

.nav-link {
    font-family: var(--font-body);
    font-weight: 500;
    font-size: 0.9375rem;
    color: var(--color-ink-muted);
    text-decoration: none;
    padding: 0.5rem 0.875rem;
    border-radius: var(--radius-pill);
    background: transparent;
    transition: all var(--transition-fast);
    border: 1.5px solid transparent;
}

.nav-link:hover {
    color: var(--color-ink);
    background: var(--color-cream-dark);
}

.nav-link.nav-active {
    color: var(--color-forest);
    background: var(--color-cream-dark);
    border-color: var(--color-border);
    font-weight: 600;
}

/* ==========================================================================
   Footer
   ========================================================================== */

footer {
    background: var(--color-forest);
    color: var(--color-sage);
    margin-top: auto;
    position: relative;
}

footer::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg,
        var(--color-terracotta) 0%,
        var(--color-ochre) 50%,
        var(--color-terracotta) 100%
    );
}

footer p {
    color: var(--color-sage);
    font-size: 0.875rem;
}

footer a {
    color: var(--color-ochre);
}

footer a:hover {
    color: var(--color-cream);
}

/* ==========================================================================
   Links
   ========================================================================== */

a {
    color: var(--color-terracotta);
    text-decoration: none;
    transition: color var(--transition-fast);
}

a:hover {
    color: var(--color-terracotta-dark);
}

/* ==========================================================================
   Cards
   ========================================================================== */

.card {
    background: white;
    border-radius: var(--radius-lg);
    border: 1px solid var(--color-border-light);
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-base);
}

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

.card-highlighted {
    background: var(--color-parchment);
    border: 1px solid var(--color-border);
}

/* ==========================================================================
   Species Cards
   ========================================================================== */

.species-card {
    display: block;
    background: white;
    border-radius: var(--radius-md);
    border: 1px solid var(--color-border-light);
    box-shadow: var(--shadow-sm);
    padding: 1rem 1.25rem;
    text-decoration: none;
    color: var(--color-ink);
    position: relative;
    overflow: hidden;
    transition: all var(--transition-base);
}

.species-card::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 4px;
    background: var(--card-accent, var(--color-forest));
    transition: width var(--transition-base);
}

.species-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
    border-color: var(--color-border);
}

.species-card:hover::before {
    width: 6px;
}

.species-card h4 {
    font-family: var(--font-display);
    font-size: 1.0625rem;
    font-weight: 600;
    color: var(--color-ink);
    margin: 0;
    line-height: 1.3;
}

.species-card:hover h4 {
    color: var(--color-forest);
}

/* ==========================================================================
   Frequency Bar
   ========================================================================== */

.frequency-bar {
    height: 6px;
    background: linear-gradient(90deg,
        var(--color-sage) 0%,
        var(--color-forest) 100%
    );
    border-radius: var(--radius-pill);
    transition: all var(--transition-base);
    position: relative;
    overflow: hidden;
}

.frequency-bar::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(90deg,
        transparent 0%,
        rgba(255,255,255,0.3) 50%,
        transparent 100%
    );
    animation: shimmer 2s ease-in-out infinite;
    opacity: 0;
    transition: opacity var(--transition-base);
}

.species-card:hover .frequency-bar::after {
    opacity: 1;
}

@keyframes shimmer {
    0% { transform: translateX(-100%); }
    100% { transform: translateX(100%); }
}

.frequency-percent {
    font-family: var(--font-display);
    font-weight: 700;
    font-size: 1.5rem;
    color: var(--color-ink);
    line-height: 1;
}

/* ==========================================================================
   Badges
   ========================================================================== */

.badge {
    display: inline-flex;
    align-items: center;
    padding: 0.25rem 0.625rem;
    font-family: var(--font-body);
    font-size: 0.6875rem;
    font-weight: 600;
    letter-spacing: 0.02em;
    text-transform: uppercase;
    border-radius: var(--radius-pill);
    line-height: 1;
}

.badge-resident {
    background: var(--badge-resident-bg);
    color: var(--badge-resident-text);
}

.badge-single-season {
    background: var(--badge-single-bg);
    color: var(--badge-single-text);
}

.badge-two-passage {
    background: var(--badge-two-passage-bg);
    color: var(--badge-two-passage-text);
}

.badge-vagrant {
    background: var(--badge-vagrant-bg);
    color: var(--badge-vagrant-text);
}

/* ==========================================================================
   Section Headers
   ========================================================================== */

.section-header {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-family: var(--font-display);
    font-size: 1.375rem;
    font-weight: 600;
    margin: 2.5rem 0 1.25rem;
    color: var(--color-ink);
}

.section-header:first-of-type {
    margin-top: 0;
}

.section-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 2rem;
    height: 2rem;
    border-radius: 50%;
    font-size: 0.875rem;
    background: var(--color-cream-dark);
    color: var(--color-ink-muted);
}

.section-icon.arriving {
    background: rgba(74, 124, 89, 0.12);
    color: var(--color-arriving);
}

.section-icon.peak {
    background: rgba(201, 165, 92, 0.15);
    color: var(--color-ochre-dark);
}

.section-icon.departing {
    background: rgba(166, 93, 78, 0.12);
    color: var(--color-departing);
}

/* ==========================================================================
   Buttons
   ========================================================================== */

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.625rem 1.25rem;
    font-family: var(--font-body);
    font-size: 0.9375rem;
    font-weight: 600;
    border-radius: var(--radius-md);
    border: none;
    cursor: pointer;
    transition: all var(--transition-fast);
    text-decoration: none;
}

.btn-primary {
    background: var(--color-terracotta);
    color: white;
}

.btn-primary:hover {
    background: var(--color-terracotta-dark);
    transform: translateY(-1px);
    box-shadow: var(--shadow-sm);
}

.btn-this-week {
    background: var(--color-terracotta);
    color: white;
    font-weight: 600;
    padding: 0.5rem 1rem;
    border-radius: var(--radius-md);
    border: none;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.btn-this-week:hover {
    background: var(--color-terracotta-dark);
    transform: translateY(-1px);
    box-shadow: var(--shadow-sm);
}

.btn-nav {
    background: white;
    color: var(--color-ink-light);
    border: 1.5px solid var(--color-border);
    padding: 0.5rem 1rem;
    border-radius: var(--radius-md);
    cursor: pointer;
    font-weight: 500;
    transition: all var(--transition-fast);
}

.btn-nav:hover {
    background: var(--color-forest);
    color: white;
    border-color: var(--color-forest);
}

.btn-nav .nav-icon {
    display: inline-flex;
    align-items: center;
    vertical-align: middle;
}

.btn-nav .nav-icon svg {
    display: block;
}

/* ==========================================================================
   Week Selector
   ========================================================================== */

.week-selector {
    background: white;
    border-radius: var(--radius-lg);
    border: 1px solid var(--color-border-light);
    box-shadow: var(--shadow-sm);
    padding: 1.25rem 1.5rem;
}

.week-selector h2 {
    font-family: var(--font-display);
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--color-ink);
    margin: 0;
}

.week-selector p {
    color: var(--color-ink-muted);
    font-size: 0.9375rem;
    margin-top: 0.25rem;
}

/* ==========================================================================
   Form Inputs
   ========================================================================== */

input, select {
    font-family: var(--font-body);
    font-size: 0.9375rem;
    color: var(--color-ink);
}

input[type="text"],
input[type="search"],
select {
    width: 100%;
    padding: 0.75rem 1rem;
    background: white;
    border: 1.5px solid var(--color-border);
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
}

input[type="text"]:focus,
input[type="search"]:focus,
select:focus {
    outline: none;
    border-color: var(--color-terracotta);
    box-shadow: 0 0 0 3px rgba(193, 127, 89, 0.12);
}

input::placeholder {
    color: var(--color-ink-faint);
}

label {
    display: block;
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--color-ink-light);
    margin-bottom: 0.5rem;
}

/* ==========================================================================
   Sort Buttons
   ========================================================================== */

.sort-btn {
    background: white;
    color: var(--color-ink-muted);
    border: 1.5px solid var(--color-border);
    padding: 0.5rem 0.875rem;
    border-radius: var(--radius-md);
    font-size: 0.875rem;
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.sort-btn:hover {
    background: var(--color-cream-dark);
    border-color: var(--color-border);
    color: var(--color-ink);
}

.sort-btn-active {
    background: var(--color-forest);
    color: white;
    border-color: var(--color-forest);
}

.sort-btn-active:hover {
    background: var(--color-forest-light);
    border-color: var(--color-forest-light);
}

.sort-arrow {
    display: inline-flex;
    align-items: center;
    vertical-align: middle;
    margin-left: 0.25rem;
}

.sort-arrow svg {
    display: block;
}

/* ==========================================================================
   Grids
   ========================================================================== */

.species-grid {
    display: grid;
    gap: 1rem;
    grid-template-columns: 1fr;
}

@media (min-width: 640px) {
    .species-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (min-width: 1024px) {
    .species-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

.species-grid > .empty-state {
    grid-column: 1 / -1;
}

.hotspots-grid {
    display: grid;
    gap: 1rem;
    grid-template-columns: 1fr;
}

@media (min-width: 768px) {
    .hotspots-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

.species-list {
    display: grid;
    gap: 0.75rem;
    grid-template-columns: 1fr;
}

@media (min-width: 768px) {
    .species-list {
        grid-template-columns: repeat(2, 1fr);
    }
}

/* ==========================================================================
   Hotspot Cards
   ========================================================================== */

.hotspot-card {
    display: block;
    background: var(--color-forest);
    border-radius: var(--radius-lg);
    padding: 1.25rem;
    text-decoration: none;
    transition: all var(--transition-base);
    box-shadow: var(--shadow-sm);
    position: relative;
    overflow: hidden;
}

.hotspot-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--color-terracotta), var(--color-ochre));
    opacity: 0;
    transition: opacity var(--transition-base);
}

.hotspot-card:hover {
    background: var(--color-forest-light);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.hotspot-card:hover::before {
    opacity: 1;
}

.hotspot-name {
    font-family: var(--font-display);
    font-weight: 600;
    font-size: 1.0625rem;
    color: var(--color-cream);
    margin-bottom: 0.625rem;
    line-height: 1.3;
}

.hotspot-card:hover .hotspot-name {
    color: white;
}

.hotspot-stats {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 0.25rem;
    margin-bottom: 0.25rem;
}

.hotspot-occurrence {
    font-family: var(--font-display);
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--color-ochre);
}

.hotspot-separator {
    color: var(--color-sage);
    margin: 0 0.375rem;
}

.hotspot-lift {
    font-size: 0.875rem;
    color: var(--color-sage);
}

.hotspot-detections {
    font-size: 0.75rem;
    color: var(--color-sage);
}

/* ==========================================================================
   Species List Items (Hotspot Detail)
   ========================================================================== */

.species-item {
    display: block;
    padding: 0.875rem 1rem;
    background: var(--color-forest);
    border-radius: var(--radius-md);
    text-decoration: none;
    transition: all var(--transition-base);
    box-shadow: var(--shadow-sm);
}

.species-item:hover {
    background: var(--color-forest-light);
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

.species-item-name {
    font-family: var(--font-display);
    font-weight: 600;
    color: var(--color-cream);
    margin-bottom: 0.25rem;
}

.species-item:hover .species-item-name {
    color: white;
}

.species-item-stats {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 0.25rem;
    font-size: 0.875rem;
    color: var(--color-sage);
}

.species-item-separator {
    color: var(--color-sage);
    margin: 0 0.25rem;
}

.species-item-occurrence,
.species-item-detections {
    color: var(--color-sage);
}

.species-item-specialty .specialty-lift {
    font-weight: 700;
    color: var(--color-ochre);
}

/* ==========================================================================
   Specialties Section
   ========================================================================== */

.specialties-section {
    background: white;
    border-radius: var(--radius-lg);
    border: 1px solid var(--color-border-light);
}

.specialties-section h2 {
    font-family: var(--font-display);
    color: var(--color-terracotta-dark);
}

.specialties-section p {
    color: var(--color-ink-muted);
}

/* ==========================================================================
   Empty & Loading States
   ========================================================================== */

.empty-state {
    text-align: center;
    padding: 3rem 1.5rem;
    color: var(--color-ink-muted);
}

.empty-state-icon {
    font-size: 2.5rem;
    margin-bottom: 0.75rem;
    opacity: 0.6;
}

.status-icon {
    display: inline-flex;
    justify-content: center;
    align-items: center;
}

.status-icon svg {
    display: block;
}

.skeleton {
    animation: pulse 2s cubic-bezier(0.4, 0, 0.6, 1) infinite;
    background: var(--color-cream-dark);
    border-radius: var(--radius-sm);
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

/* ==========================================================================
   Charts
   ========================================================================== */

.chart-container {
    position: relative;
    height: 280px;
    margin: 1.25rem 0;
    background: white;
    border-radius: var(--radius-md);
    padding: 1rem;
}

/* ==========================================================================
   Detail Page Styles
   ========================================================================== */

.detail-header {
    background: var(--color-forest);
    color: var(--color-cream);
}

.detail-header h1 {
    font-family: var(--font-display);
    color: var(--color-cream);
}

.back-link {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--color-sage);
    font-size: 0.9375rem;
    font-weight: 500;
    text-decoration: none;
    transition: color var(--transition-fast);
}

.back-link:hover {
    color: var(--color-cream);
}

.stat-card {
    background: white;
    border-radius: var(--radius-md);
    border: 1px solid var(--color-border-light);
    padding: 1rem 1.25rem;
    text-align: center;
}

.stat-value {
    font-family: var(--font-display);
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-ink);
}

.stat-label {
    font-size: 0.8125rem;
    color: var(--color-ink-muted);
    margin-top: 0.25rem;
}

/* ==========================================================================
   Container Utilities
   ========================================================================== */

.container-bg {
    background: var(--color-parchment);
}

@media (min-width: 1280px) {
    main.max-w-7xl,
    header .max-w-7xl,
    footer .max-w-7xl {
        width: 1280px;
        max-width: 1280px;
    }
}

/* ==========================================================================
   Animation Utilities
   ========================================================================== */

.fade-in {
    animation: fadeIn 0.4s ease-out;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(8px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.stagger-1 { animation-delay: 0.05s; }
.stagger-2 { animation-delay: 0.1s; }
.stagger-3 { animation-delay: 0.15s; }
.stagger-4 { animation-delay: 0.2s; }
.stagger-5 { animation-delay: 0.25s; }
.stagger-6 { animation-delay: 0.3s; }

/* ==========================================================================
   Mobile Optimizations
   ========================================================================== */

@media (max-width: 639px) {
    .section-header {
        font-size: 1.25rem;
        margin: 2rem 0 1rem;
    }

    .week-selector {
        padding: 1rem 1.25rem;
    }

    .species-card {
        padding: 0.875rem 1rem;
    }

    .frequency-percent {
        font-size: 1.25rem;
    }
}

/* ==========================================================================
   Print Styles
   ========================================================================== */

@media print {
    body::before {
        display: none;
    }

    header, footer {
        background: none;
        color: var(--color-ink);
    }

    .species-card, .hotspot-card {
        box-shadow: none;
        border: 1px solid #ccc;
    }
}