/* Design System - Color Variables */
:root {
    /* Brand Colors */
    --brand-primary: #1a73e8;
    --brand-primary-dark: #1557b0;
    --brand-primary-light: #4a8ff0;

    /* Background System - Default Light Theme */
    --bg-app: #ffffff;
    --bg-contrast: #ffffff;
    --bg-hover: rgba(0,0,0,0.05);

    /* Text System - Default Light Theme */
    --text-on-brand: #333333;
    --text-primary: #202124;
    --text-secondary: #5f6368;
    --text-muted: #80868b;
    --text-on-contrast: #202124;

    /* Interactive Elements */
    --button-primary-bg: #ffffff;
    --button-primary-text: #1a73e8;
    --button-primary-hover: #f8f9fa;
    --button-primary-active: #e8eaed;

    --button-secondary-bg: #1a73e8;
    --button-secondary-text: #ffffff;
    --button-secondary-hover: #1557b0;
    --button-secondary-active: #1765cc;

    /* Borders */
    --border-light: #dadce0;
    --border-medium: #5f6368;
    --border-focus: #1a73e8;

    /* Shadows */
    --shadow-sm: 0 1px 2px rgba(0,0,0,0.05);
    --shadow-md: 0 2px 4px rgba(0,0,0,0.1), 0 8px 16px rgba(0,0,0,0.1);
    --shadow-focus: 0 1px 2px rgba(26,115,232,0.1);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Arial, sans-serif;
    background: var(--bg-app);
    color: var(--text-on-brand);
    min-height: 100vh;
    padding-top: 0;
}

/* Logo visibility - default is blue logo on white background */
.logo-white { display: none; }
.logo-blue { display: block; }

/* Dark theme for All Stairs public pages */
body.app-allstairs.dark {
    --bg-app: var(--brand-primary);
    --bg-contrast: #ffffff;
    --text-on-brand: #ffffff;
}

body.app-allstairs.dark .site-header {
    background: var(--brand-primary);
    border-bottom: 1px solid rgba(255,255,255,0.2);
    transition: background 0.2s ease;
}

body.app-allstairs.dark .logo-white {
    display: block;
}

body.app-allstairs.dark .logo-blue {
    display: none;
}

.site-header {
    background: #ffffff;
    border-bottom: 2px solid var(--brand-primary);
    padding: 1rem 2rem;
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: var(--shadow-sm);
}

.header-inner {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    flex-shrink: 0;
}

.logo img {
    height: 50px;
    width: auto;
}

.logo a {
    display: block;
    line-height: 0;
}

.main-nav ul {
    list-style: none;
    display: flex;
    gap: 2rem;
    align-items: center;
}

.main-nav a {
    color: #333333;
    text-decoration: none;
    font-size: 1rem;
    font-weight: 500;
    transition: color 0.2s;
}

.main-nav a:hover {
    color: var(--brand-primary);
}

body.app-allstairs.dark .main-nav a {
    color: #ffffff;
}

body.app-allstairs.dark .main-nav a:hover {
    color: rgba(255,255,255,0.8);
}

.menu-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
    padding: 10px;
}

.menu-toggle span {
    display: block;
    width: 25px;
    height: 3px;
    background: #333333;
    transition: all 0.3s;
}

body.app-allstairs.dark .menu-toggle span {
    background: #ffffff;
}

@media (max-width: 768px) {
    .site-header {
        padding: 1rem;
    }

    .menu-toggle {
        display: flex;
    }

    .main-nav {
        position: fixed;
        top: 0;
        right: -100%;
        width: 300px;
        height: 100vh;
        background: #ffffff;
        padding: 100px 0 2rem 0;
        transition: right 0.3s;
        box-shadow: -2px 0 10px rgba(0,0,0,0.1);
        overflow-y: auto;
    }

    body.app-allstairs.dark .main-nav {
        background: #0d47a1;
    }

    body.menu-open .main-nav {
        right: 0;
    }

    .main-nav ul {
        flex-direction: column;
        align-items: stretch;
        gap: 0;
    }

    .main-nav li {
        border-bottom: 1px solid rgba(0,0,0,0.08);
    }

    body.app-allstairs.dark .main-nav li {
        border-bottom: 1px solid rgba(255,255,255,0.1);
    }

    .main-nav a {
        display: block;
        padding: 16px 24px;
        font-size: 1rem;
        font-weight: 500;
        color: #333333;
        background: transparent;
        transition: all 0.2s;
    }

    body.app-allstairs.dark .main-nav a {
        color: #ffffff;
    }

    .main-nav a:hover {
        background: rgba(26,115,232,0.08);
        color: var(--brand-primary);
        padding-left: 28px;
    }

    body.app-allstairs.dark .main-nav a:hover {
        background: rgba(255,255,255,0.15);
        color: #ffffff;
        padding-left: 28px;
    }

    .main-nav a:active {
        background: rgba(26,115,232,0.15);
    }

    body.app-allstairs.dark .main-nav a:active {
        background: rgba(255,255,255,0.25);
    }

    body.menu-open .menu-toggle span:nth-child(1) {
        transform: rotate(45deg) translate(8px, 8px);
    }

    body.menu-open .menu-toggle span:nth-child(2) {
        opacity: 0;
    }

    body.menu-open .menu-toggle span:nth-child(3) {
        transform: rotate(-45deg) translate(7px, -7px);
    }

    body.menu-open::before {
        content: '';
        position: fixed;
        top: 0;
        left: 0;
        right: 0;
        bottom: 0;
        background: rgba(0,0,0,0.5);
        z-index: 999;
    }

    .main-nav {
        z-index: 1000;
    }
}

/* Content Container - Reusable box for page content */
.content-container {
    max-width: 1200px;
    margin: 60px auto;
    padding: 40px;
    background: var(--brand-primary-dark);
    color: white;
    border-radius: 8px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.05);
}

@media (max-width: 768px) {
    .content-container {
        margin: 30px auto;
        padding: 24px;
    }
}

/* Contrast Box - Provides contrast coloring (opposite of background) */
.contrast-box {
    background: var(--bg-contrast);
    border: 1px solid transparent;
    border-radius: 8px;
    box-shadow: var(--shadow-md);
    color: var(--text-on-contrast);
}

.contrast-box .logo {
    position: absolute;
    top: -20px;
    left: 50%;
    transform: translateX(-50%);
    width: 80px;
    height: 80px;
    background: var(--brand-primary);
    border-radius: 50%;
    box-shadow: 0 2px 8px rgba(0,0,0,0.15);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1;
}

.contrast-box .logo img {
    width: 50px;
    height: 50px;
    object-fit: contain;
}

.contrast-box .logo .logo-blue {
    display: none;
}

.contrast-box .logo .logo-white {
    display: block;
}

.contrast-box h2 {
    margin-bottom: 8px;
    color: var(--text-primary);
    font-size: 1.5rem;
    font-weight: 400;
    margin-top: 20px;
}

.contrast-box .subtitle {
    color: var(--text-secondary);
    font-size: 0.875rem;
    margin-bottom: 32px;
}

/* Form field styling for contrast boxes */
.contrast-box .form-field {
    position: relative;
    margin-bottom: 24px;
    text-align: left;
}

.contrast-box .form-field label {
    display: block;
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--text-primary);
    margin-bottom: 8px;
    letter-spacing: 0.01em;
}

.contrast-box .form-field input[type=email],
.contrast-box .form-field input[type=text],
.contrast-box .form-field input[type=password] {
    width: 100%;
    padding: 14px 16px;
    font-size: 16px;
    color: var(--text-primary);
    background: var(--bg-contrast);
    border: 1px solid var(--border-light);
    border-radius: 4px;
    transition: all 0.15s ease-in-out;
    box-sizing: border-box;
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Arial, sans-serif;
}

.contrast-box .form-field input:hover {
    border-color: var(--border-medium);
    box-shadow: var(--shadow-sm);
}

.contrast-box .form-field input:focus {
    outline: none;
    border-color: var(--border-focus);
    border-width: 2px;
    padding: 13px 15px;
    box-shadow: var(--shadow-focus);
}

.contrast-box .form-field input::placeholder {
    color: var(--text-secondary);
    opacity: 0.7;
}

.contrast-box .submit-btn,
.contrast-box input[type=submit],
.contrast-box .btn-primary {
    width: 100%;
    padding: 12px 24px;
    background: var(--button-primary-bg);
    color: var(--button-primary-text);
    border: 2px solid var(--brand-primary);
    border-radius: 4px;
    font-size: 0.875rem;
    font-weight: 600;
    letter-spacing: 0.25px;
    cursor: pointer;
    transition: all 0.15s ease-in-out;
    text-transform: uppercase;
    text-decoration: none;
    display: inline-block;
    text-align: center;
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Arial, sans-serif;
}

.contrast-box .submit-btn:hover,
.contrast-box input[type=submit]:hover,
.contrast-box .btn-primary:hover {
    background: var(--button-primary-hover);
    box-shadow: 0 1px 2px rgba(0,0,0,0.15), 0 2px 4px rgba(0,0,0,0.1);
    transform: translateY(-1px);
}

.contrast-box .submit-btn:active,
.contrast-box input[type=submit]:active,
.contrast-box .btn-primary:active {
    background: var(--button-primary-active);
    box-shadow: 0 1px 2px rgba(0,0,0,0.1);
    transform: translateY(0);
}

/* Secondary button style (filled blue) */
.contrast-box .btn-secondary {
    background: var(--button-secondary-bg);
    color: var(--button-secondary-text);
    border: 2px solid var(--button-secondary-bg);
}

.contrast-box .btn-secondary:hover {
    background: var(--button-secondary-hover);
    border-color: var(--button-secondary-hover);
}

.contrast-box .btn-secondary:active {
    background: var(--button-secondary-active);
    border-color: var(--button-secondary-active);
}

.contrast-box p {
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: 12px;
    font-size: 0.9375rem;
}

.contrast-box b {
    color: var(--text-primary);
}


/* Site Footer */
.site-footer {
    background: var(--bg-app);
    border-top: 1px solid rgba(0,0,0,0.1);
    padding: 40px 2rem;
    margin-top: 80px;
    text-align: center;
}

body.app-allstairs.dark .site-footer {
    border-top: 1px solid rgba(255,255,255,0.2);
}

.footer-inner {
    max-width: 1200px;
    margin: 0 auto;
}

.footer-links {
    margin-bottom: 16px;
    font-size: 14px;
}

.footer-links a {
    color: var(--text-on-brand);
    text-decoration: none;
    font-weight: 500;
    opacity: 0.8;
    transition: opacity 0.2s;
}

.footer-links a:hover {
    opacity: 1;
    text-decoration: underline;
}

.footer-copyright {
    font-size: 13px;
    color: var(--text-on-brand);
    opacity: 0.6;
}

@media (max-width: 768px) {
    .site-footer {
        padding: 32px 1rem;
        margin-top: 60px;
    }

    .footer-links {
        font-size: 13px;
    }

    .footer-copyright {
        font-size: 12px;
    }
}

/* ==========================================================================
   Reusable Card Grid System
   ========================================================================== */

.resource-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.resource-card {
    border: 1px solid rgba(255,255,255,0.15);
    border-radius: 8px;
    background: rgba(255,255,255,0.05);
    display: flex;
    flex-direction: column;
    transition: all 0.3s ease;
}

.resource-card:hover {
    background: rgba(255,255,255,0.08);
    border-color: rgba(255,255,255,0.25);
    transform: translateY(-2px);
    box-shadow: 0 8px 16px rgba(0,0,0,0.2);
}

.resource-card .card-header {
    padding: 1.25rem;
    border-bottom: 1px solid rgba(255,255,255,0.1);
}

.resource-card .card-header .resource-title {
    margin: 0;
    font-size: 1.25rem;
    color: white;
    font-weight: 600;
}

.resource-card .card-body {
    padding: 1.25rem;
    flex: 1;
}

.resource-card .card-body .excerpt {
    margin: 0 0 1rem 0;
    color: rgba(255,255,255,0.85);
    line-height: 1.6;
    font-size: 0.95rem;
}

.resource-card .card-footer {
    padding: 1.25rem;
    border-top: 1px solid rgba(255,255,255,0.1);
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 1rem;
}

.resource-card .card-footer .footer-right {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-left: auto;
}

/* Stats Display */
.stats {
    display: flex;
    gap: 1rem;
    font-size: 0.85rem;
    color: rgba(255,255,255,0.7);
}

.stats .stat-item {
    display: flex;
    align-items: center;
    gap: 0.25rem;
}

.stats i {
    opacity: 0.6;
}

/* Detail Button - Reusable */
.btn-detail {
    display: inline-block;
    padding: 0.5rem 1.25rem;
    background: rgba(255,255,255,0.1);
    color: white;
    text-decoration: none;
    border-radius: 4px;
    font-weight: 500;
    transition: all 0.2s;
    border: 1px solid rgba(255,255,255,0.2);
}

.btn-detail:hover {
    background: rgba(255,255,255,0.2);
    border-color: rgba(255,255,255,0.4);
    color: white;
    transform: translateX(2px);
}

/* Tag Display */
.resource-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.resource-card .card-body .resource-tags {
    margin-top: 1rem;
}

.resource-tags .tag {
    display: inline-block;
    padding: 0.25rem 0.75rem;
    background: rgba(255,255,255,0.1);
    border-radius: 12px;
    text-decoration: none;
    color: rgba(255,255,255,0.85);
    font-size: 0.85rem;
    transition: background 0.2s;
    border: 1px solid rgba(255,255,255,0.15);
}

.resource-tags .tag:hover {
    background: rgba(255,255,255,0.15);
    color: white;
}

/* Tag Filters Section */
.tag-filters {
    margin: 2rem 0;
    padding: 1.5rem;
    background: rgba(255,255,255,0.05);
    border-radius: 8px;
}

.tag-filters h3 {
    margin: 0 0 1rem 0;
    font-size: 1.1rem;
    color: white;
}

.tag-filters .tag-list {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
}

.tag-pill {
    display: inline-block;
    padding: 0.5rem 1rem;
    background: rgba(255,255,255,0.1);
    border: 2px solid rgba(255,255,255,0.2);
    border-radius: 20px;
    text-decoration: none;
    color: white;
    font-size: 0.9rem;
    transition: all 0.2s;
    font-weight: 500;
}

.tag-pill:hover {
    background: rgba(255,255,255,0.2);
    border-color: rgba(255,255,255,0.4);
    transform: translateY(-2px);
}

.tag-pill.active {
    background: white;
    color: var(--brand-primary-dark);
    border-color: white;
}

/* Submit Section */
.submit-section {
    margin: 2rem 0;
    text-align: right;
}

.submit-section .btn-primary {
    background: white;
    color: var(--brand-primary-dark);
    border: 2px solid white;
    font-weight: 600;
}

.submit-section .btn-primary:hover {
    background: rgba(255,255,255,0.9);
    transform: translateY(-2px);
}

/* Remove Filter Link */
.remove-filter {
    color: white;
    text-decoration: none;
    font-size: 1rem;
    font-weight: 500;
    transition: color 0.2s;
}

.remove-filter:hover {
    color: rgba(255,255,255,0.8);
    text-decoration: underline;
}

/* ==========================================================================
   Resource Detail Page
   ========================================================================== */

.resource-detail {
    background: rgba(255,255,255,0.05);
    border-radius: 8px;
    padding: 2.5rem;
    margin-bottom: 2rem;
}

.resource-detail .detail-header {
    margin-bottom: 2rem;
    padding-bottom: 1.5rem;
    border-bottom: 2px solid rgba(255,255,255,0.2);
}

.resource-detail .detail-header .resource-title {
    margin: 0 0 0.5rem 0;
    color: white;
    font-size: 2rem;
}

.resource-detail .maintainer-info {
    margin-top: 0.5rem;
}

.resource-detail .maintainer-info .maintainer {
    margin: 0;
    color: rgba(255,255,255,0.7);
    font-size: 1rem;
    font-style: italic;
}

/* External Link Section */
.external-link-section {
    margin: 2rem 0;
    padding: 1.5rem;
    background: rgba(255,255,255,0.1);
    border: 2px solid rgba(255,255,255,0.3);
    border-radius: 8px;
    text-align: center;
}

.external-link-section .btn-large {
    font-size: 1.2rem;
    padding: 0.875rem 2rem;
    background: white;
    color: var(--brand-primary-dark);
    font-weight: 600;
}

.external-link-section .btn-large:hover {
    background: rgba(255,255,255,0.9);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0,0,0,0.3);
}

/* Tags Section in Detail */
.resource-detail .resource-tags {
    margin: 2rem 0;
    padding: 1.5rem;
    background: rgba(255,255,255,0.05);
    border-radius: 8px;
}

.resource-detail .resource-tags h3 {
    margin: 0 0 1rem 0;
    font-size: 1.1rem;
    color: white;
}

.resource-detail .resource-tags .tag-list {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
}

.resource-detail .resource-tags .tag {
    padding: 0.5rem 1rem;
    font-size: 0.95rem;
    background: rgba(255,255,255,0.15);
    border: 1px solid rgba(255,255,255,0.3);
}

/* Description Section */
.resource-description {
    margin: 2rem 0;
}

.resource-description h2 {
    font-size: 1.5rem;
    margin: 0 0 1rem 0;
    color: white;
}

.resource-description .description-content,
.resource-description .excerpt {
    line-height: 1.7;
    color: rgba(255,255,255,0.9);
    font-size: 1rem;
}

/* Statistics Section */
.resource-stats {
    margin: 2rem 0;
    padding: 1.5rem;
    background: rgba(255,255,255,0.05);
    border-radius: 8px;
}

.resource-stats h3 {
    margin: 0 0 1rem 0;
    font-size: 1.1rem;
    color: white;
}

.resource-stats ul {
    margin: 0;
    padding: 0;
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.resource-stats li {
    padding: 0.5rem 0;
    color: rgba(255,255,255,0.85);
    font-size: 0.95rem;
}

/* Action Buttons */
.resource-actions {
    margin: 2rem 0;
    padding: 1.5rem;
    background: rgba(255,255,255,0.08);
    border: 1px solid rgba(255,255,255,0.2);
    border-radius: 8px;
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}

.resource-actions .btn {
    background: rgba(255,255,255,0.2);
    color: white;
    border: 1px solid rgba(255,255,255,0.3);
    padding: 0.75rem 1.5rem;
    font-weight: 500;
}

.resource-actions .btn:hover {
    background: rgba(255,255,255,0.3);
    border-color: rgba(255,255,255,0.5);
    transform: translateY(-1px);
}

/* Location Section */
.resource-location {
    margin: 2rem 0;
}

.resource-location h3 {
    font-size: 1.1rem;
    margin: 0 0 0.5rem 0;
    color: white;
}

.resource-location p {
    margin: 0;
    color: rgba(255,255,255,0.85);
}

/* Back Link */
.back-link {
    margin-top: 2rem;
    padding-top: 1.5rem;
    border-top: 1px solid rgba(255,255,255,0.2);
}

.back-link a {
    color: white;
    text-decoration: none;
    font-weight: 500;
    transition: all 0.2s;
}

.back-link a:hover {
    color: rgba(255,255,255,0.8);
    text-decoration: underline;
}

/* ==========================================================================
   Form Pages (Generic, Reusable)
   ========================================================================== */

.form-page,
.form-container {
    background: rgba(255,255,255,0.05);
    padding: 2rem;
    border-radius: 8px;
    margin-bottom: 2rem;
}

.form-section {
    margin-bottom: 2rem;
}

.form-section h2 {
    font-size: 1.25rem;
    margin: 0 0 1.5rem 0;
    color: white;
    padding-bottom: 0.5rem;
    border-bottom: 2px solid rgba(255,255,255,0.2);
}

.form-group {
    margin-bottom: 1.5rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 600;
    color: white;
    font-size: 0.95rem;
}

.form-group input,
.form-group textarea,
.form-group select,
.form-control {
    width: 100%;
    padding: 0.75rem;
    border: 1px solid rgba(255,255,255,0.3);
    border-radius: 4px;
    font-size: 1rem;
    font-family: inherit;
    background: rgba(255,255,255,0.1);
    color: white;
}

.form-group input::placeholder,
.form-group textarea::placeholder {
    color: rgba(255,255,255,0.5);
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
    outline: none;
    border-color: white;
    background: rgba(255,255,255,0.15);
    box-shadow: 0 0 0 3px rgba(255,255,255,0.1);
}

.form-group .help-text {
    margin: 0.5rem 0 0 0;
    font-size: 0.875rem;
    color: rgba(255,255,255,0.7);
}

.form-actions {
    display: flex;
    gap: 1rem;
    margin-top: 2rem;
}

/* Info Boxes */
.info-box {
    padding: 1.5rem;
    background: rgba(255,255,255,0.1);
    border-left: 4px solid white;
    margin-bottom: 2rem;
    border-radius: 4px;
}

.info-box p {
    margin: 0;
    line-height: 1.6;
    color: rgba(255,255,255,0.9);
}

/* Form Steps */
.form-step {
    background: rgba(255,255,255,0.05);
    padding: 2rem;
    border-radius: 8px;
    margin-bottom: 2rem;
}

.form-step h3 {
    margin: 0 0 1rem 0;
    color: white;
}

.form-step .code-input {
    font-size: 1.5rem;
    text-align: center;
    letter-spacing: 0.5rem;
    font-weight: bold;
}

/* Buttons */
.btn {
    display: inline-block;
    padding: 0.625rem 1.25rem;
    border: none;
    border-radius: 4px;
    text-decoration: none;
    font-size: 1rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s;
}

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

.btn-primary:hover {
    background: rgba(255,255,255,0.9);
    transform: translateY(-1px);
}

.btn-secondary {
    background: rgba(255,255,255,0.2);
    color: white;
    border: 1px solid rgba(255,255,255,0.3);
}

.btn-secondary:hover {
    background: rgba(255,255,255,0.3);
    border-color: rgba(255,255,255,0.5);
}

.btn-warning {
    background: #ffc107;
    color: #000;
}

.btn-warning:hover {
    background: #e0a800;
}

.btn-large {
    font-size: 1.1rem;
    padding: 0.875rem 1.75rem;
}

@media (max-width: 768px) {
    .resource-grid {
        grid-template-columns: 1fr;
    }
}