/* === 1. Global Variables & Resets === */
:root {
    /* Dark Theme Colors */
    --primary-color: #ff4040;
    --primary-color-hover: #e53935;
    --primary-color-light: #ff8080;
    --primary-text-color: #ffffff;

    --secondary-color: #555555;
    --secondary-color-hover: #666666;

    --success-color: #66bb6a;
    --success-color-hover: #4caf50;
    --warning-color: #ffc107;
    --warning-color-hover: #ffa000;
    --danger-color: #e53e3e;
    --danger-color-hover: #c82333;
    
    --bg-color: #1c1c1c;
    --container-bg-color: #2a2a2a;
    --secondary-bg-color: #303030;
    --tertiary-bg-color: #3a3a3a;
    --top-bar-bg-color: rgba(42, 42, 42, 0.9);
    
    --text-color: #e0e0e0;
    --text-color-light: #aaa;
    --link-color: #ffc107;
    
    --border-color: #555555;
    --border-radius-sm: 8px;
    --border-radius-md: 15px;
    --border-radius-lg: 25px;

    --box-shadow: 0 10px 30px rgba(0, 0, 0, 0.4);
    --box-shadow-hover: 0 6px 20px rgba(0, 0, 0, 0.3);
    --primary-shadow: 0 4px 15px rgba(255, 64, 64, 0.3);
}

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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    color: var(--text-color);
    background: var(--bg-color);
    min-height: 100vh;
    padding-top: 80px;
    transition: background-color 0.3s ease, color 0.3s ease;
}

/* === Custom Scrollbar === */
/* Firefox */
* {
    scrollbar-width: thin;
    scrollbar-color: #555555 #2a2a2a;
}

/* Chrome, Edge, Safari */
*::-webkit-scrollbar {
    width: 12px;
    height: 12px;
}

*::-webkit-scrollbar-track {
    background: #2a2a2a;
}

*::-webkit-scrollbar-thumb {
    background: #555555;
    border-radius: 6px;
}

*::-webkit-scrollbar-thumb:hover {
    background: #666666;
}

/* === 2. Typography === */
h1 {
    color: var(--primary-color);
    text-align: center;
    font-size: 2rem;
    text-shadow: 1px 1px 3px rgba(0, 0, 0, 0.3);
    word-break: break-word;
    padding-bottom: 10px;
}

h2 {
    color: var(--primary-color);
    border-bottom: 2px solid var(--border-color);
    margin-bottom: 20px;
    font-size: 1.9rem;
    padding-bottom: 10px;
    text-align: center;
    word-break: break-word;
}

h3 {
    color: var(--primary-color-light);
    font-size: 1.3rem;
    margin-bottom: 10px;
}

/* === 3. Navbar === */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px 30px;
    background: var(--top-bar-bg-color);
    backdrop-filter: blur(5px);
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.3);
    z-index: 1000;
    height: 64px;
}

.nav-container {
    width: 100%;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-brand,
.logo {
    font-size: 1.5rem;
    font-weight: bold;
    color: var(--primary-color);
    text-decoration: none;
    text-shadow: 1px 1px 3px rgba(0, 0, 0, 0.3);
}

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

.nav-links a {
    color: var(--text-color-light);
    text-decoration: none;
    font-weight: 600;
    font-size: 1rem;
    transition: all 0.3s ease;
    padding: 8px 16px;
    border-radius: var(--border-radius-sm);
}

.nav-links a:hover,
.nav-links a.active {
    color: var(--primary-color);
    background: var(--secondary-bg-color);
}

/* === 4. Layout Containers === */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
}

/* === 5. Buttons === */
.btn {
    color: var(--primary-text-color);
    border: none;
    outline: none;
    border-radius: var(--border-radius-lg);
    cursor: pointer;
    font-weight: 600;
    font-size: 1rem;
    padding: 12px 25px;
    transition: all 0.3s ease;
    text-decoration: none;
    display: inline-block;
}

.btn:hover:not(:disabled) {
    transform: translateY(-2px);
    box-shadow: var(--box-shadow-hover);
}

.btn:disabled {
    cursor: not-allowed;
    opacity: 0.6;
}

/* --- Button Color Modifiers --- */
.btn-primary {
    background: var(--primary-color);
    box-shadow: var(--primary-shadow);
    border: none;
    outline: none;
}

.btn-primary:hover:not(:disabled) {
    background: var(--primary-color-hover);
}

.btn-primary.active, .option-btn.active {
    background-color: var(--primary-color-hover);
    box-shadow: var(--primary-shadow);
    transform: translateY(-2px);
}

.btn-secondary {
    background: var(--secondary-color);
    border: none;
    outline: none;
}

.btn-secondary:hover:not(:disabled) {
    background: var(--secondary-color-hover);
}

.btn-success {
    background: var(--success-color);
    border: none;
    outline: none;
}

.btn-success:hover:not(:disabled) {
    background: var(--success-color-hover);
}

.btn-logout {
    background: var(--danger-color);
    color: var(--primary-text-color);
    border: none;
    border-radius: var(--border-radius-lg);
    padding: 8px 16px;
    cursor: pointer;
    font-weight: 600;
    transition: all 0.3s ease;
}

.btn-logout:hover {
    background: var(--danger-color-hover);
    transform: translateY(-2px);
}

.btn-small {
    padding: 8px 16px;
    font-size: 0.9rem;
}

.btn-copy {
    background: var(--success-color);
    color: var(--primary-text-color);
    border: none;
    border-radius: var(--border-radius-lg);
    padding: 12px;
    cursor: pointer;
    font-weight: 600;
    font-size: 1rem;
    transition: all 0.3s ease;
}

.btn-copy:hover {
    background: var(--success-color-hover);
    transform: translateY(-2px);
}

.btn-copy.copied {
    background: #2196f3;
}

.btn-add {
    display: block;
    width: 100%;
    margin: 1rem 0;
    padding: 12px;
    background: var(--success-color);
    color: var(--primary-text-color);
    border: none;
    outline: none;
    border-radius: var(--border-radius-lg);
    cursor: pointer;
    transition: all 0.3s ease;
    font-weight: 600;
    font-size: 1rem;
}

.btn-add:hover {
    background: var(--success-color-hover);
    transform: translateY(-2px);
    box-shadow: var(--box-shadow-hover);
}

.btn-remove {
    background: var(--danger-color);
    color: var(--primary-text-color);
    border: none;
    outline: none;
    padding: 8px 12px;
    border-radius: var(--border-radius-lg);
    cursor: pointer;
    transition: all 0.3s ease;
    font-weight: 600;
}

.btn-remove:hover {
    background: var(--danger-color-hover);
    transform: translateY(-2px);
    box-shadow: var(--box-shadow-hover);
}

/* === 6. Forms === */
.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    color: var(--text-color);
    margin-bottom: 8px;
    font-weight: 600;
}

.form-group input,
.form-group textarea,
.form-group select {
    width: 100%;
    padding: 12px 15px;
    background: var(--bg-color);
    border: 2px solid var(--border-color);
    border-radius: var(--border-radius-sm);
    color: var(--text-color);
    font-size: 1rem;
    transition: all 0.3s ease;
    font-family: inherit;
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(255, 64, 64, 0.2);
}

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

/* === 7. Cards === */
.card {
    background: var(--secondary-bg-color);
    border-radius: var(--border-radius-md);
    padding: 20px;
    margin-bottom: 20px;
    border-left: 5px solid var(--primary-color);
    box-shadow: 0 3px 10px rgba(0, 0, 0, 0.3);
    transition: all 0.3s ease;
}

.card:hover {
    transform: translateY(-2px);
    background: var(--tertiary-bg-color);
}

/* === 8. Status Badges === */
.status-badge {
    display: inline-block;
    padding: 6px 12px;
    border-radius: var(--border-radius-lg);
    font-size: 0.85rem;
    font-weight: 600;
}

.status-badge.status-active {
    background: rgba(102, 187, 106, 0.2);
    color: var(--success-color);
}

.status-badge.status-upcoming {
    background: rgba(255, 193, 7, 0.2);
    color: var(--warning-color);
}

.status-badge.status-closed {
    background: rgba(85, 85, 85, 0.3);
    color: var(--text-color-light);
}

.status-badge.status-finalized {
    background: rgba(255, 64, 64, 0.2);
    color: var(--primary-color);
}

/* === 9. Messages & Alerts === */
.info-box {
    background: var(--secondary-bg-color);
    border-left: 4px solid var(--primary-color);
    padding: 15px 20px;
    margin: 20px 0;
    border-radius: var(--border-radius-sm);
}

.info-box p {
    color: var(--text-color);
    margin: 8px 0;
}

.error {
    color: var(--danger-color);
    background: rgba(229, 62, 62, 0.1);
    padding: 8px 12px;
    border-radius: var(--border-radius-sm);
    margin-top: 5px;
    font-size: 0.9rem;
}

.error-message {
    background: rgba(229, 62, 62, 0.2);
    border-left: 4px solid var(--danger-color);
    padding: 15px 20px;
    margin: 20px 0;
    border-radius: var(--border-radius-sm);
    color: var(--text-color);
}

.success-message {
    background: rgba(102, 187, 106, 0.2);
    border-left: 4px solid var(--success-color);
    padding: 15px 20px;
    margin: 20px 0;
    border-radius: var(--border-radius-sm);
    color: var(--text-color);
}

.no-data {
    text-align: center;
    color: var(--text-color-light);
    padding: 40px 20px;
    font-style: italic;
}

/* === 10. Loading States === */
.loading {
    text-align: center;
    padding: 40px 20px;
    color: var(--text-color-light);
}

.loading-dots {
    display: inline-flex;
    gap: 8px;
}

.loading-dots span {
    display: inline-block;
    width: 10px;
    height: 10px;
    background-color: var(--primary-color-light);
    border-radius: 50%;
    animation: bounce 1.4s infinite ease-in-out both;
}

.loading-dots span:nth-child(2) {
    animation-delay: -0.16s;
}

.loading-dots span:nth-child(3) {
    animation-delay: -0.32s;
}

@keyframes bounce {
    0%, 80%, 100% { transform: scale(0); }
    40% { transform: scale(1.0); }
}

/* === 11. Modals === */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.8);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 2000;
    backdrop-filter: blur(5px);
}

.modal-content {
    background: var(--container-bg-color);
    border-radius: var(--border-radius-md);
    padding: 30px;
    max-width: 600px;
    width: 90%;
    max-height: 90vh;
    overflow-y: auto;
    box-shadow: var(--box-shadow);
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
    border-bottom: 2px solid var(--border-color);
    padding-bottom: 15px;
}

.modal-header h2 {
    margin: 0;
    border: none;
    padding: 0;
}

.modal-close {
    background: var(--secondary-bg-color);
    border: none;
    color: var(--text-color);
    font-size: 1.5rem;
    cursor: pointer;
    border-radius: 50%;
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s ease;
}

.modal-close:hover {
    background: var(--danger-color);
    transform: rotate(90deg);
}

.modal-body {
    color: var(--text-color);
}

/* === 12. Footer === */
footer {
    text-align: center;
    padding: 30px 20px;
    color: var(--text-color-light);
    margin-top: 40px;
}

/* === 13. Responsive Design === */
@media (max-width: 768px) {
    .navbar {
        padding: 10px 15px;
    }

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

    .nav-links a {
        padding: 6px 12px;
        font-size: 0.9rem;
    }

    .container {
        padding: 15px;
    }

    h1 {
        font-size: 1.5rem;
    }

    h2 {
        font-size: 1.3rem;
    }

    .btn {
        padding: 10px 20px;
        font-size: 0.95rem;
    }

    .modal-content {
        width: 95%;
        padding: 20px;
    }
}

/* === 14. Utility Classes === */
.text-center {
    text-align: center;
}

.text-left {
    text-align: left;
}

.text-right {
    text-align: right;
}

.mt-1 { margin-top: 10px; }
.mt-2 { margin-top: 20px; }
.mt-3 { margin-top: 30px; }

.mb-1 { margin-bottom: 10px; }
.mb-2 { margin-bottom: 20px; }
.mb-3 { margin-bottom: 30px; }

.p-1 { padding: 10px; }
.p-2 { padding: 20px; }
.p-3 { padding: 30px; }

/* === 15. Tabs System === */
.tabs-container {
    background: var(--container-bg-color);
    border-radius: var(--border-radius-md);
    box-shadow: var(--box-shadow);
    overflow: hidden;
    margin-top: 30px;
}

.tabs-nav {
    display: flex;
    background: var(--secondary-bg-color);
    border-bottom: 2px solid var(--border-color);
    gap: 0;
}

.tab-btn {
    flex: 1;
    padding: 18px 25px;
    background: transparent;
    border: none;
    color: var(--text-color-light);
    font-size: 1rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s ease;
    position: relative;
    outline: none;
}

.tab-btn:hover {
    background: var(--tertiary-bg-color);
    color: var(--text-color);
}

.tab-btn.active {
    background: var(--container-bg-color);
    color: var(--primary-color);
    font-weight: 600;
}

.tab-btn.active::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--primary-color);
}

.tab-content {
    display: none;
    padding: 30px;
    animation: fadeIn 0.3s ease;
}

.tab-content.active {
    display: block;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Responsive tabs */
@media (max-width: 768px) {
    .tabs-nav {
        flex-direction: column;
    }
    
    .tab-btn {
        width: 100%;
        text-align: left;
        padding: 15px 20px;
    }
    
    .tab-btn.active::after {
        height: 100%;
        width: 3px;
        bottom: 0;
        top: 0;
        left: 0;
        right: auto;
    }
}