/* Reset a základní styly */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    /* Tmavé pozadí */
    --bg-primary: #1a1816;
    --bg-secondary: #252220;
    --bg-tertiary: #2d2a27;

    /* Teplé akcenty - oranžovo-hnědá (zvýšená saturace pro lepší čitelnost) */
    --accent-primary: #ea580c;
    --accent-secondary: #f59e0b;
    --accent-tertiary: #fbbf24;

    /* Text barvy */
    --text-primary: #e8e5e1;
    --text-secondary: #b8b5b1;
    --text-muted: #78756f;

    /* Status barvy */
    --success: #10b981;
    --warning: #f59e0b;
    --danger: #ef4444;
    --info: #3b82f6;

    /* Shadows */
    --shadow-sm: 0 1px 3px 0 rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.5);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.6);
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    background: var(--bg-primary);
    background-image: radial-gradient(circle at 20% 50%, rgba(217, 119, 6, 0.05) 0%, transparent 50%),
        radial-gradient(circle at 80% 80%, rgba(245, 158, 11, 0.05) 0%, transparent 50%);
    color: var(--text-primary);
    min-height: 100vh;
    line-height: 1.6;
}

body.landing-body {
    color: var(--text-primary);
    background: radial-gradient(circle at top, rgba(217, 119, 6, 0.1), transparent 60%), var(--bg-primary);
}

.era-header {
    color: var(--accent-secondary);
}

/* Kontejnery */
.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 24px;
}

@media (max-width: 640px) {
    .container {
        padding: 16px;
    }
}

.tech-name {
    color: var(--accent-secondary);
}

.tech-cost {
    color: var(--text-muted);
}

#season-name {
    color: #fbbf24;
}

.section {
    background: var(--bg-secondary);
    background-image: linear-gradient(145deg, var(--bg-secondary) 0%, var(--bg-tertiary) 100%);
    border-radius: 12px;
    border: 1px solid rgba(217, 119, 6, 0.1);
    padding: 24px;
    margin-bottom: 24px;
    box-shadow: var(--shadow-md);
    transition: all 0.3s ease;
}

.section:hover {
    border-color: rgba(217, 119, 6, 0.2);
    box-shadow: var(--shadow-lg);
}

.section h2 {
    color: #fbbf24;
    font-size: 1.6rem;
    margin-bottom: 18px;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 8px;
    text-shadow: 0 1px 2px rgba(0, 0, 0, 0.3);
}

.section h3 {
    color: var(--text-primary);
    font-size: 1.15rem;
    margin-top: 18px;
    margin-bottom: 14px;
    font-weight: 500;
}

@media (max-width: 640px) {
    .section {
        padding: 18px;
    }
}

.grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 20px;
    margin-top: 20px;
}

/* Navbar */
.navbar {
    background: var(--bg-secondary);
    background-image: linear-gradient(180deg, var(--bg-secondary) 0%, var(--bg-tertiary) 100%);
    border-bottom: 2px solid rgba(217, 119, 6, 0.2);
    padding: 16px 32px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 20px;
    box-shadow: var(--shadow-lg);
    margin-bottom: 0;
    position: sticky;
    top: 0;
    z-index: 500;
    backdrop-filter: blur(10px);
}

.navbar-brand-wrapper {
    display: flex;
    align-items: center;
    gap: 14px;
    flex: 1;
}

.navbar h1 {
    font-size: 1.5rem;
    color: var(--accent-tertiary);
    font-weight: 700;
    display: flex;
    align-items: center;
    gap: 8px;
}

.navbar-toggle {
    display: none;
    flex-direction: column;
    align-items: center;
    gap: 4px;
    border: 1px solid rgba(255, 255, 255, 0.35);
    background: rgba(0, 0, 0, 0.25);
    color: white;
    border-radius: 10px;
    padding: 6px 10px;
    cursor: pointer;
    transition: background 0.2s ease, border 0.2s ease;
}

.navbar-toggle:hover {
    background: rgba(255, 255, 255, 0.12);
    border-color: rgba(255, 255, 255, 0.5);
}

.navbar-toggle-bars {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.navbar-toggle-bars span {
    display: block;
    width: 22px;
    height: 2px;
    border-radius: 999px;
    background: currentColor;
}

.navbar-toggle-text {
    font-size: 0.65rem;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: rgba(255, 255, 255, 0.8);
}

.navbar-links {
    display: flex;
    align-items: center;
    justify-content: flex-end;
    gap: 16px;
    flex: 1;
}

.navbar-primary-links {
    display: flex;
    align-items: center;
    gap: 12px;
}

.navbar-meta {
    display: flex;
    align-items: center;
    gap: 12px;
}

.navbar-language {
    padding: 6px 10px;
    border-radius: 6px;
    border: 1px solid rgba(255, 255, 255, 0.25);
    background: rgba(255, 255, 255, 0.15);
    color: white;
    cursor: pointer;
}

.navbar-username {
    color: white;
    font-weight: 500;
}

.navbar a {
    color: var(--text-primary);
    text-decoration: none;
    font-weight: 500;
    transition: all 0.2s ease;
    padding: 8px 14px;
    border-radius: 6px;
}

.navbar a:hover {
    color: white;
    background: rgba(234, 88, 12, 0.2);
}

.navbar-overlay {
    display: none;
}

.page-header {
    padding: 20px 32px 10px;
}

@media (max-width: 640px) {
    .page-header {
        padding: 16px 18px 8px !important;
    }
}

@media (max-width: 960px) {
    .navbar {
        flex-direction: column;
        align-items: stretch;
        gap: 0;
    }

    .navbar-brand-wrapper {
        width: 100%;
        justify-content: space-between;
    }

    .navbar-toggle {
        display: flex;
    }

    .navbar-links {
        position: fixed;
        top: 0;
        right: 0;
        width: min(360px, 85%);
        height: 100vh;
        flex-direction: column;
        align-items: stretch;
        justify-content: flex-start;
        gap: 24px;
        padding: 80px 24px 32px;
        background: var(--bg-secondary);
        transform: translateX(100%);
        transition: transform 0.28s ease;
        box-shadow: var(--shadow-xl);
        overflow-y: auto;
        z-index: 120;
    }

    .navbar-links.navbar-links-open {
        transform: translateX(0);
    }

    .navbar-primary-links {
        flex-direction: column;
        align-items: flex-start;
        width: 100%;
        gap: 10px;
    }

    .navbar-primary-links a {
        width: 100%;
        padding: 12px 0;
    }

    .navbar-meta {
        flex-direction: column;
        align-items: flex-start;
        width: 100%;
        gap: 14px;
    }

    .navbar-overlay {
        display: block;
        position: fixed;
        top: 0;
        left: 0;
        width: 100vw;
        height: 100vh;
        background: rgba(0, 0, 0, 0.55);
        opacity: 0;
        pointer-events: none;
        transition: opacity 0.3s ease;
        z-index: 110;
    }

    .navbar-overlay.navbar-overlay-visible {
        opacity: 1;
        pointer-events: auto;
    }

    body.nav-menu-open {
        overflow: hidden;
    }
}

/* Header */
.header {
    text-align: center;
    padding: 40px 20px;
    color: white;
}

.header h1 {
    font-size: 48px;
    margin-bottom: 10px;
}

.landing {
    max-width: 1200px;
    margin: 0 auto;
    padding: 40px 20px 80px;
    display: flex;
    flex-direction: column;
    gap: 40px;
}

.landing-navbar {
    max-width: 1200px;
    margin: 20px auto 0;
    border-radius: 12px;
    backdrop-filter: blur(8px);
}

.landing-navbar .logo {
    font-size: 22px;
    font-weight: 700;
    color: #667eea;
}

.nav-links {
    display: flex;
    gap: 20px;
    align-items: center;
}

.nav-links a {
    color: #555;
    font-weight: 600;
    text-decoration: none;
    transition: color 0.2s ease;
}

.landing-navbar .nav-links a {
    color: #444;
}

.landing-navbar .nav-links a:hover {
    color: #667eea;
}

.nav-actions {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
}

.hero {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 40px;
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.95), rgba(237, 242, 255, 0.95));
    border: none;
}

.hero h1 {
    font-size: 42px;
    color: #2d2a44;
    margin-bottom: 20px;
}

.hero p {
    color: #4a4a68;
    font-size: 18px;
    margin-bottom: 25px;
}

.hero-buttons {
    display: flex;
    gap: 15px;
    flex-wrap: wrap;
    margin-bottom: 20px;
}

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

.btn-cta {
    box-shadow: 0 12px 30px rgba(102, 126, 234, 0.3);
}

.hero-highlights {
    list-style: none;
    color: #4a4a68;
    display: grid;
    gap: 10px;
    font-size: 16px;
    margin-top: 10px;
}

.hero-visual {
    display: flex;
    flex-direction: column;
    gap: 20px;
    align-items: center;
    justify-content: center;
}

.hero-orbit {
    position: relative;
    width: 260px;
    height: 260px;
    border-radius: 50%;
    border: 2px dashed rgba(118, 75, 162, 0.4);
    display: flex;
    align-items: center;
    justify-content: center;
    animation: orbit-spin 18s linear infinite;
}

.hero-planet {
    width: 120px;
    height: 120px;
    border-radius: 50%;
    background: linear-gradient(135deg, #667eea, #764ba2);
    box-shadow: 0 15px 40px rgba(102, 126, 234, 0.45);
}

.hero-satellite {
    position: absolute;
    top: -12px;
    right: 30px;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: linear-gradient(135deg, #f6d365, #fda085);
    box-shadow: 0 10px 20px rgba(253, 160, 133, 0.4);
}

.hero-progress {
    background: white;
    padding: 20px;
    border-radius: 12px;
    text-align: center;
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.1);
    color: #2d2a44;
    min-width: 220px;
}

.hero-progress span {
    display: block;
    font-size: 14px;
    color: #7a7a99;
}

.hero-progress strong {
    display: block;
    font-size: 26px;
    color: #667eea;
    margin: 6px 0 12px;
}

@keyframes orbit-spin {
    from {
        transform: rotate(0deg);
    }
    to {
        transform: rotate(360deg);
    }
}

.features h2,
.showcase h2,
.testimonials h2 {
    text-align: center;
    color: #2d2a44;
    margin-bottom: 15px;
}

.feature-grid {
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
}

.feature-card {
    background: #f8f9ff;
    border-radius: 12px;
    padding: 25px;
    text-align: center;
    border: 1px solid rgba(102, 126, 234, 0.15);
    box-shadow: 0 10px 20px rgba(102, 126, 234, 0.12);
    transition:
        transform 0.3s ease,
        box-shadow 0.3s ease;
}

.feature-card:hover {
    transform: translateY(-6px);
    box-shadow: 0 15px 30px rgba(102, 126, 234, 0.18);
}

.feature-card h3 {
    color: #2d2a44;
    margin-bottom: 12px;
}

.feature-card p {
    color: #55556d;
    line-height: 1.5;
}

.feature-icon {
    font-size: 36px;
    margin-bottom: 12px;
}

.section-heading {
    text-align: center;
    margin-bottom: 25px;
    color: #4a4a68;
}

.showcase-grid {
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
}

.showcase-card {
    border-radius: 14px;
    padding: 25px;
    color: white;
    position: relative;
    overflow: hidden;
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.9), rgba(118, 75, 162, 0.9));
    box-shadow: 0 15px 30px rgba(118, 75, 162, 0.25);
}

.showcase-card::after {
    content: "";
    position: absolute;
    top: -40px;
    right: -40px;
    width: 120px;
    height: 120px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
}

.showcase-card h3 {
    font-size: 22px;
    margin-bottom: 10px;
}

.showcase-card p {
    color: rgba(255, 255, 255, 0.9);
    line-height: 1.5;
}

.testimonials {
    background: rgba(255, 255, 255, 0.95);
}

.testimonial-grid {
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
}

.testimonial {
    background: #f8f9ff;
    padding: 25px;
    border-radius: 12px;
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.08);
    position: relative;
}

.testimonial blockquote {
    font-style: italic;
    color: #4a4a68;
    margin-bottom: 15px;
    line-height: 1.6;
}

.testimonial::before {
    content: "“";
    position: absolute;
    top: -10px;
    left: 20px;
    font-size: 48px;
    color: rgba(102, 126, 234, 0.15);
}

.testimonial figcaption {
    color: #667eea;
    font-weight: 600;
}

.cta-banner {
    display: flex;
    flex-direction: column;
    gap: 15px;
    align-items: center;
    justify-content: center;
    text-align: center;
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.95), rgba(118, 75, 162, 0.95));
    color: white;
}

.cta-banner h2 {
    margin-bottom: 10px;
}

.cta-banner p {
    color: rgba(255, 255, 255, 0.85);
    max-width: 720px;
}

.landing-footer {
    text-align: center;
    color: rgba(255, 255, 255, 0.85);
    margin: 40px 0 20px;
    font-size: 14px;
}

@media (max-width: 768px) {
    .landing-navbar {
        flex-direction: column;
        gap: 15px;
        text-align: center;
    }

    .nav-links {
        flex-wrap: wrap;
        justify-content: center;
    }

    .hero {
        padding: 30px 20px;
    }

    .hero h1 {
        font-size: 32px;
    }

    .hero-visual {
        order: -1;
    }
}

.subtitle {
    font-size: 18px;
    opacity: 0.9;
}

/* Auth container */
.auth-container {
    max-width: 500px;
    margin: 0 auto;
    background: white;
    border-radius: 20px;
    padding: 40px;
    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.15);
    animation: fadeInUp 0.6s ease-out;
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.tabs {
    display: flex;
    margin-bottom: 20px;
    border-bottom: 2px solid #eee;
}

.tab {
    flex: 1;
    padding: 10px;
    background: none;
    border: none;
    cursor: pointer;
    font-size: 16px;
    color: #666;
    transition: all 0.3s;
}

.tab.active {
    color: #667eea;
    border-bottom: 2px solid #667eea;
    margin-bottom: -2px;
}

/* Forms */
.auth-form h2 {
    margin-bottom: 20px;
    color: #333;
}

.form-group {
    margin-bottom: 25px;
    animation: slideIn 0.4s ease-out backwards;
}

.form-group:nth-child(1) { animation-delay: 0.1s; }
.form-group:nth-child(2) { animation-delay: 0.2s; }
.form-group:nth-child(3) { animation-delay: 0.3s; }

@keyframes slideIn {
    from {
        opacity: 0;
        transform: translateX(-20px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    color: var(--text-muted);
    font-weight: 500;
    font-size: 14px;
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 12px;
    border: 1px solid rgba(217, 119, 6, 0.3);
    border-radius: 8px;
    font-size: 14px;
    background: var(--bg-tertiary);
    color: var(--text-primary);
    transition: all 0.2s ease;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--accent-secondary);
    box-shadow: 0 0 0 3px rgba(217, 119, 6, 0.1);
}

.form-group textarea {
    min-height: 100px;
    resize: vertical;
    font-family: inherit;
}

/* Large Input - lákavější formuláře */
.large-input {
    padding: 18px 20px !important;
    font-size: 18px !important;
    border: 2px solid rgba(217, 119, 6, 0.4) !important;
    border-radius: 12px !important;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
    transition: all 0.3s ease !important;
}

.large-input:hover {
    border-color: rgba(217, 119, 6, 0.6) !important;
    box-shadow: 0 4px 12px rgba(217, 119, 6, 0.15);
}

.large-input:focus {
    outline: none !important;
    border-color: var(--accent-primary) !important;
    box-shadow: 0 0 0 4px rgba(217, 119, 6, 0.15), 0 4px 16px rgba(217, 119, 6, 0.2) !important;
    transform: translateY(-2px);
}

.large-input::placeholder {
    color: rgba(102, 102, 102, 0.5);
    font-size: 16px;
}

/* Buttons */
.btn {
    padding: 10px 20px;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    font-size: 14px;
    transition: all 0.2s ease;
    margin-right: 10px;
    font-weight: 600;
    box-shadow: var(--shadow-sm);
}

.btn:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.btn:active {
    transform: translateY(0);
}

.btn-primary {
    background: linear-gradient(135deg, var(--accent-primary) 0%, var(--accent-secondary) 100%);
    color: white;
    border: 1px solid var(--accent-primary);
}

.btn-primary:hover {
    background: linear-gradient(135deg, var(--accent-secondary) 0%, var(--accent-tertiary) 100%);
}

.btn-secondary {
    background: var(--bg-tertiary);
    color: var(--text-primary);
    border: 1px solid rgba(217, 119, 6, 0.3);
}

.btn-secondary:hover {
    background: var(--bg-secondary);
    border-color: rgba(217, 119, 6, 0.5);
}

.btn-action {
    background: linear-gradient(135deg, var(--success) 0%, #059669 100%);
    color: white;
    border: 1px solid var(--success);
}

.btn-action:hover {
    background: linear-gradient(135deg, #059669 0%, #047857 100%);
}

/* Large Button - lákavější CTA */
.btn-large {
    width: 100%;
    padding: 18px 32px !important;
    font-size: 20px !important;
    font-weight: 700 !important;
    border-radius: 12px !important;
    box-shadow: 0 4px 15px rgba(217, 119, 6, 0.25) !important;
    transition: all 0.3s ease !important;
    margin-top: 10px;
}

.btn-large:hover {
    transform: translateY(-3px) !important;
    box-shadow: 0 8px 25px rgba(217, 119, 6, 0.35) !important;
}

.btn-large:active {
    transform: translateY(-1px) !important;
    box-shadow: 0 4px 15px rgba(217, 119, 6, 0.25) !important;
}

/* Cards */
.card {
    background: var(--bg-tertiary);
    background-image: linear-gradient(145deg, var(--bg-tertiary) 0%, var(--bg-secondary) 100%);
    border-radius: 12px;
    padding: 20px;
    cursor: pointer;
    transition: all 0.3s ease;
    border: 1px solid rgba(217, 119, 6, 0.15);
    box-shadow: var(--shadow-sm);
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
    border-color: rgba(217, 119, 6, 0.3);
}

.card h3 {
    color: #fbbf24;
    margin-bottom: 12px;
    font-size: 1.2rem;
    font-weight: 600;
}

.card p {
    color: var(--text-primary);
    margin: 8px 0;
    line-height: 1.6;
}

.badge {
    display: inline-block;
    padding: 5px 10px;
    background: linear-gradient(135deg, var(--accent-primary) 0%, var(--accent-secondary) 100%);
    color: white;
    border-radius: 6px;
    font-size: 12px;
    font-weight: 600;
    margin-top: 10px;
    box-shadow: var(--shadow-sm);
}

.badge.badge-success {
    background: linear-gradient(135deg, var(--success) 0%, #059669 100%);
}

.badge.badge-warning {
    background: linear-gradient(135deg, var(--warning) 0%, var(--accent-secondary) 100%);
}

.badge.badge-danger {
    background: linear-gradient(135deg, var(--danger) 0%, #dc2626 100%);
}

/* Resources */
.resources,
.stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: 12px;
}

.resource,
.stat {
    padding: 12px 16px;
    background: rgba(37, 34, 32, 0.6);
    border: 1px solid rgba(217, 119, 6, 0.2);
    border-radius: 8px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: all 0.2s ease;
}

.resource:hover,
.stat:hover {
    background: rgba(37, 34, 32, 0.8);
    border-color: rgba(217, 119, 6, 0.4);
}

.resource span,
.stat span {
    color: var(--text-primary);
    font-size: 14px;
    font-weight: 500;
}

.resource strong,
.stat strong {
    color: #fbbf24;
    font-size: 19px;
    font-weight: 700;
    text-shadow: 0 1px 2px rgba(0, 0, 0, 0.3);
}

/* Resource trend arrows */
.resource-trend {
    font-weight: bold;
    font-size: 16px;
    margin-left: 5px;
    cursor: help;
    transition: transform 0.2s ease;
}

.resource:hover .resource-trend {
    transform: scale(1.2);
}

.resource[title]:hover {
    background: rgba(37, 34, 32, 0.9);
    border-color: rgba(217, 119, 6, 0.5);
    cursor: help;
}

/* Actions */
.actions {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
}

/* Items list */
.items-list {
    max-height: 400px;
    overflow-y: auto;
}

.item {
    padding: 10px;
    background: #f8f9fa;
    color: #fbbf24;
    border-radius: 5px;
    margin-bottom: 10px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

/* Events */
.events-list {
    max-height: 500px;
    overflow-y: auto;
    padding-right: 8px;
}

.events-list::-webkit-scrollbar {
    width: 8px;
}

.events-list::-webkit-scrollbar-track {
    background: var(--bg-tertiary);
    border-radius: 4px;
}

.events-list::-webkit-scrollbar-thumb {
    background: var(--accent-primary);
    border-radius: 4px;
}

.event {
    padding: 14px 16px;
    margin-bottom: 12px;
    background: rgba(37, 34, 32, 0.6);
    border-left: 4px solid var(--accent-primary);
    border-radius: 8px;
    transition: all 0.2s ease;
}

.event:hover {
    background: rgba(37, 34, 32, 0.8);
    border-left-color: var(--accent-secondary);
}

.event small {
    color: var(--text-muted);
    font-size: 11px;
    font-weight: 500;
}

.event p {
    margin-top: 8px;
    color: var(--text-primary);
    line-height: 1.5;
}

/* Modal */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.75);
    backdrop-filter: blur(4px);
    justify-content: center;
    align-items: center;
    z-index: 1000;
    animation: fadeIn 0.2s ease;
}

@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

.modal-content {
    background: var(--bg-secondary);
    background-image: linear-gradient(145deg, var(--bg-secondary) 0%, var(--bg-tertiary) 100%);
    border: 2px solid rgba(217, 119, 6, 0.3);
    border-radius: 16px;
    padding: 32px;
    max-width: 600px;
    width: 90%;
    max-height: 90vh;
    overflow-y: auto;
    box-shadow: var(--shadow-xl);
    animation: slideUp 0.3s ease;
}

@keyframes slideUp {
    from {
        transform: translateY(20px);
        opacity: 0;
    }
    to {
        transform: translateY(0);
        opacity: 1;
    }
}

.modal-content h3 {
    margin-bottom: 24px;
    color: #fbbf24;
    font-size: 1.6rem;
    font-weight: 600;
    text-shadow: 0 1px 2px rgba(0, 0, 0, 0.3);
}

/* Building cards */
.building-card {
    background: rgba(37, 34, 32, 0.6);
    border-radius: 10px;
    padding: 16px;
    margin-bottom: 16px;
    border: 2px solid rgba(217, 119, 6, 0.2);
    transition: all 0.3s ease;
}

.building-card:hover {
    background: rgba(37, 34, 32, 0.8);
    border-color: rgba(217, 119, 6, 0.4);
}

.building-card.can-afford {
    border-color: var(--success);
    box-shadow: 0 0 12px rgba(16, 185, 129, 0.2);
}

.building-card.cannot-afford {
    border-color: var(--danger);
    opacity: 0.6;
}

.building-card h4 {
    margin-bottom: 12px;
    color: #fbbf24;
    font-size: 1.15rem;
    font-weight: 600;
}

.building-card .description {
    color: var(--text-primary);
    font-size: 14px;
    margin-bottom: 12px;
    line-height: 1.6;
}

.building-card .costs {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 12px;
}

.building-card .cost-item {
    background: var(--bg-tertiary);
    border: 1px solid rgba(217, 119, 6, 0.3);
    padding: 5px 10px;
    border-radius: 6px;
    font-size: 13px;
    color: var(--text-primary);
}

.building-card .cost-item.missing {
    color: var(--danger);
    border-color: var(--danger);
    font-weight: bold;
}

.building-card .bonuses {
    font-size: 13px;
    color: var(--accent-tertiary);
    margin-bottom: 12px;
}

.building-card .upgrade-btn {
    background: linear-gradient(135deg, var(--warning) 0%, var(--accent-secondary) 100%);
    color: white;
    padding: 8px 16px;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    font-size: 13px;
    font-weight: 600;
    margin-left: 10px;
    transition: all 0.2s ease;
}

.building-card .upgrade-btn:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

/* Messages */
.message {
    margin-top: 16px;
    padding: 14px 18px;
    border-radius: 8px;
    text-align: center;
    font-weight: 500;
    border: 1px solid;
}

.message.error {
    background: rgba(239, 68, 68, 0.1);
    color: var(--danger);
    border-color: var(--danger);
}

.message.success {
    background: rgba(16, 185, 129, 0.1);
    color: var(--success);
    border-color: var(--success);
}

.message.info {
    background: rgba(59, 130, 246, 0.1);
    color: var(--info);
    border-color: var(--info);
}

.empty {
    text-align: center;
    color: var(--text-muted);
    padding: 40px 20px;
    font-style: italic;
    font-size: 14px;
}

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

    .navbar {
        flex-direction: column;
        gap: 10px;
    }

    .resources,
    .stats {
        grid-template-columns: 1fr;
    }

    .actions {
        flex-direction: column;
    }

    .actions .btn {
        width: 100%;
    }
}

/* ================================================
   KATEGORIE BUDOV - Nový design
   ================================================ */

/* Kategorie ve stavebním menu */
.building-category {
    margin-bottom: 25px;
}

.category-header {
    color: var(--accent-tertiary);
    font-size: 1.2rem;
    font-weight: 600;
    margin-bottom: 15px;
    padding-bottom: 8px;
    border-bottom: 2px solid rgba(217, 119, 6, 0.3);
    display: flex;
    align-items: center;
    gap: 8px;
}

.category-buildings {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 15px;
}

/* Kategorie v seznamu postavených budov */
.structures-category {
    margin-bottom: 20px;
    padding-bottom: 15px;
    border-bottom: 1px solid rgba(217, 119, 6, 0.2);
}

.structures-category:last-child {
    border-bottom: none;
}

.structures-category-header {
    color: var(--accent-secondary);
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 12px;
    display: flex;
    align-items: center;
    gap: 6px;
    text-transform: uppercase;
    font-size: 0.9rem;
    letter-spacing: 0.5px;
}

/* Seskupené budovy */
.structures-grouped {
    background: linear-gradient(135deg, var(--bg-secondary) 0%, var(--bg-tertiary) 100%);
    border-left: 3px solid var(--accent-primary);
}

.structures-grouped:hover {
    border-left-color: var(--accent-secondary);
    transform: translateX(3px);
}

/* Responzivita pro kategorie */
@media (max-width: 768px) {
    .category-buildings {
        grid-template-columns: 1fr;
    }

    .category-header,
    .structures-category-header {
        font-size: 1rem;
    }
}