/* style.css - Sistema de diseño premium para edunoap */

@import url('https://fonts.googleapis.com/css2?family=Outfit:wght@300;400;500;600;700&family=JetBrains+Mono:wght@400;500&display=swap');

:root {
    --bg-dark: #080c14;
    --bg-card: rgba(17, 24, 39, 0.6);
    --bg-card-hover: rgba(26, 36, 57, 0.7);
    --border-color: rgba(255, 255, 255, 0.08);
    --border-hover: rgba(255, 255, 255, 0.15);
    
    --primary-gradient: linear-gradient(135deg, #6366f1, #8b5cf6);
    --primary-glow: rgba(99, 102, 241, 0.15);
    --primary-color: #6366f1;
    --primary-light: #a5b4fc;
    
    --success-color: #10b981;
    --success-glow: rgba(16, 185, 129, 0.15);
    
    --danger-color: #ef4444;
    --danger-glow: rgba(239, 68, 68, 0.15);
    
    --warning-color: #f59e0b;
    
    --text-main: #f3f4f6;
    --text-muted: #9ca3af;
    --text-dark: #4b5563;
    
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

body {
    font-family: 'Outfit', sans-serif;
    background-color: var(--bg-dark);
    color: var(--text-main);
    min-height: 100vh;
    overflow-x: hidden;
    background-image: 
        radial-gradient(at 10% 20%, rgba(99, 102, 241, 0.08) 0px, transparent 50%),
        radial-gradient(at 90% 80%, rgba(139, 92, 246, 0.08) 0px, transparent 50%);
    background-attachment: fixed;
}

/* Custom Scrollbar */
::-webkit-scrollbar {
    width: 6px;
    height: 6px;
}
::-webkit-scrollbar-track {
    background: rgba(0, 0, 0, 0.1);
}
::-webkit-scrollbar-thumb {
    background: rgba(255, 255, 255, 0.1);
    border-radius: 4px;
}
::-webkit-scrollbar-thumb:hover {
    background: rgba(255, 255, 255, 0.2);
}

/* Layout */
.app-container {
    display: flex;
    flex-direction: column;
    height: 100vh;
}

header {
    background: rgba(17, 24, 39, 0.8);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border-color);
    padding: 1.2rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    z-index: 100;
}

.brand-section {
    display: flex;
    align-items: center;
    gap: 0.8rem;
}

.logo-badge {
    background: var(--primary-gradient);
    width: 38px;
    height: 38px;
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 4px 15px var(--primary-glow);
    font-weight: 700;
    font-size: 1.2rem;
}

header h1 {
    font-size: 1.4rem;
    font-weight: 600;
    letter-spacing: -0.02em;
    background: linear-gradient(to right, #ffffff, #a5b4fc);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.server-status {
    display: flex;
    align-items: center;
    gap: 0.6rem;
    font-size: 0.85rem;
    color: var(--text-muted);
    background: rgba(255, 255, 255, 0.03);
    padding: 0.5rem 1rem;
    border-radius: 20px;
    border: 1px solid var(--border-color);
}

.status-dot {
    width: 8px;
    height: 8px;
    background-color: var(--success-color);
    border-radius: 50%;
    box-shadow: 0 0 10px var(--success-color);
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(16, 185, 129, 0.7); }
    70% { transform: scale(1); box-shadow: 0 0 0 6px rgba(16, 185, 129, 0); }
    100% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(16, 185, 129, 0); }
}

/* Main Dashboard Grid */
.dashboard-grid {
    display: grid;
    grid-template-columns: 320px 1fr;
    flex: 1;
    overflow: hidden;
}

/* Sidebar Styling */
.sidebar {
    background: rgba(10, 15, 26, 0.4);
    border-right: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    padding: 1.5rem;
    overflow-y: auto;
}

.search-wrapper {
    position: relative;
    margin-bottom: 1.2rem;
}

.search-input {
    width: 100%;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 0.75rem 1rem 0.75rem 2.5rem;
    color: var(--text-main);
    font-family: inherit;
    font-size: 0.9rem;
    outline: none;
    transition: var(--transition-fast);
}

.search-input:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px var(--primary-glow);
    background: rgba(255, 255, 255, 0.08);
}

.search-icon {
    position: absolute;
    left: 0.9rem;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-muted);
    font-size: 0.95rem;
    pointer-events: none;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    font-family: inherit;
    font-weight: 500;
    font-size: 0.9rem;
    padding: 0.7rem 1.2rem;
    border-radius: 12px;
    border: none;
    cursor: pointer;
    transition: var(--transition-normal);
    text-decoration: none;
}

.btn-primary {
    background: var(--primary-gradient);
    color: white;
    box-shadow: 0 4px 15px var(--primary-glow);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(99, 102, 241, 0.35);
}

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

.btn-secondary {
    background: rgba(255, 255, 255, 0.05);
    color: var(--text-main);
    border: 1px solid var(--border-color);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: var(--border-hover);
}

.btn-danger {
    background: rgba(239, 68, 68, 0.1);
    color: var(--danger-color);
    border: 1px solid rgba(239, 68, 68, 0.2);
}

.btn-danger:hover {
    background: var(--danger-color);
    color: white;
    box-shadow: 0 4px 15px var(--danger-glow);
}

.btn-sm {
    padding: 0.4rem 0.8rem;
    font-size: 0.8rem;
    border-radius: 8px;
}

.sidebar-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
}

.sidebar-title {
    font-size: 0.85rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--text-muted);
}

.course-list {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    flex: 1;
    overflow-y: auto;
}

.course-item {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 1rem;
    cursor: pointer;
    transition: var(--transition-normal);
    position: relative;
    overflow: hidden;
}

.course-item::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    height: 100%;
    width: 4px;
    background: var(--primary-gradient);
    opacity: 0;
    transition: var(--transition-fast);
}

.course-item:hover {
    background: var(--bg-card-hover);
    border-color: var(--border-hover);
    transform: translateX(3px);
}

.course-item.active {
    background: rgba(99, 102, 241, 0.08);
    border-color: rgba(99, 102, 241, 0.3);
}

.course-item.active::before {
    opacity: 1;
}

.course-item-name {
    font-weight: 600;
    font-size: 0.95rem;
    margin-bottom: 0.25rem;
    color: #ffffff;
}

.course-item-code {
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.8rem;
    color: var(--text-muted);
    background: rgba(255, 255, 255, 0.03);
    padding: 0.1rem 0.4rem;
    border-radius: 4px;
    display: inline-block;
}

/* Workspace / Main View Area */
.workspace {
    overflow-y: auto;
    padding: 2rem;
    display: flex;
    flex-direction: column;
}

.empty-state {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    flex: 1;
    text-align: center;
    color: var(--text-muted);
}

.empty-icon {
    font-size: 4rem;
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    margin-bottom: 1.5rem;
    filter: drop-shadow(0 4px 10px var(--primary-glow));
    animation: float 4s ease-in-out infinite;
}

@keyframes float {
    0% { transform: translateY(0px); }
    50% { transform: translateY(-10px); }
    100% { transform: translateY(0px); }
}

.empty-state h3 {
    color: #ffffff;
    font-size: 1.5rem;
    margin-bottom: 0.5rem;
}

.course-detail-header {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 1.5rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
    box-shadow: 0 4px 30px rgba(0, 0, 0, 0.2);
    backdrop-filter: blur(10px);
}

.course-title-area h2 {
    font-size: 1.8rem;
    font-weight: 700;
    margin-bottom: 0.4rem;
}

.course-metadata {
    display: flex;
    gap: 1rem;
    align-items: center;
    font-size: 0.85rem;
    color: var(--text-muted);
}

.badge-code {
    font-family: 'JetBrains Mono', monospace;
    color: var(--primary-light);
    background: rgba(99, 102, 241, 0.15);
    border: 1px solid rgba(99, 102, 241, 0.2);
    padding: 0.2rem 0.6rem;
    border-radius: 6px;
    font-weight: 500;
}

/* Tree Structure Styling */
.structure-tree {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.section-title {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 1rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

/* Nodes Styling */
.unit-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 1.5rem;
    margin-bottom: 1.2rem;
    transition: var(--transition-normal);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
}

.unit-card:hover {
    border-color: rgba(99, 102, 241, 0.3);
    box-shadow: 0 6px 25px rgba(99, 102, 241, 0.05);
}

.node-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
}

.node-title-wrapper {
    display: flex;
    align-items: center;
    gap: 0.8rem;
}

.node-tag {
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    padding: 0.2rem 0.5rem;
    border-radius: 6px;
    font-weight: 700;
}

.tag-unit {
    background: rgba(16, 185, 129, 0.15);
    color: var(--success-color);
    border: 1px solid rgba(16, 185, 129, 0.2);
}

.tag-section {
    background: rgba(245, 158, 11, 0.15);
    color: var(--warning-color);
    border: 1px solid rgba(245, 158, 11, 0.2);
}

.tag-cap {
    background: rgba(139, 92, 246, 0.15);
    color: #a855f7;
    border: 1px solid rgba(139, 92, 246, 0.2);
}

.node-name {
    font-size: 1.15rem;
    font-weight: 600;
    color: #ffffff;
}

.node-code {
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.8rem;
    color: var(--text-muted);
    background: rgba(255, 255, 255, 0.04);
    padding: 0.15rem 0.5rem;
    border-radius: 5px;
    border: 1px solid var(--border-color);
}

.node-actions {
    display: flex;
    gap: 0.5rem;
    align-items: center;
}

/* Sections Nested Area */
.sections-container {
    border-left: 2px dashed rgba(255, 255, 255, 0.06);
    margin-left: 0.8rem;
    padding-left: 1.5rem;
    display: flex;
    flex-direction: column;
    gap: 1rem;
    margin-top: 1rem;
}

.section-card {
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 1.2rem;
    transition: var(--transition-normal);
}

.section-card:hover {
    border-color: rgba(245, 158, 11, 0.3);
    background: rgba(255, 255, 255, 0.03);
}

/* Caps Nested Area (List Layout) */
.caps-container {
    display: flex;
    flex-direction: column;
    gap: 0.6rem;
    margin-top: 1rem;
    border-left: 2px dashed rgba(255, 255, 255, 0.06);
    margin-left: 0.8rem;
    padding-left: 1.5rem;
}

.cap-card {
    background: rgba(139, 92, 246, 0.04);
    border: 1px solid rgba(139, 92, 246, 0.12);
    border-radius: 10px;
    padding: 0.6rem 1rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: var(--transition-normal);
}

.cap-card:hover {
    background: rgba(139, 92, 246, 0.08);
    border-color: rgba(139, 92, 246, 0.25);
    transform: translateX(3px);
}

.cap-name {
    font-size: 0.85rem;
    font-weight: 500;
    color: #e9d5ff;
}

.cap-code {
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.75rem;
    color: var(--text-muted);
    background: rgba(0, 0, 0, 0.2);
    padding: 0.05rem 0.35rem;
    border-radius: 4px;
}

.btn-unlink-cap {
    background: none;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    font-size: 0.8rem;
    transition: var(--transition-fast);
    display: flex;
    align-items: center;
}

.btn-unlink-cap:hover {
    color: var(--danger-color);
    transform: scale(1.1);
}

/* Modal Styling */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background: rgba(3, 7, 18, 0.6);
    backdrop-filter: blur(10px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    opacity: 0;
    pointer-events: none;
    transition: opacity var(--transition-normal);
}

.modal-overlay.active {
    opacity: 1;
    pointer-events: all;
}

.modal-content {
    background: rgba(17, 24, 39, 0.95);
    border: 1px solid var(--border-color);
    border-radius: 20px;
    width: 90%;
    max-width: 500px;
    padding: 2rem;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.4);
    transform: translateY(20px) scale(0.95);
    transition: transform var(--transition-normal);
}

.modal-overlay.active .modal-content {
    transform: translateY(0) scale(1);
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
}

.modal-title {
    font-size: 1.3rem;
    font-weight: 600;
    color: #ffffff;
}

.modal-close {
    background: none;
    border: none;
    color: var(--text-muted);
    font-size: 1.5rem;
    cursor: pointer;
    transition: var(--transition-fast);
}

.modal-close:hover {
    color: #ffffff;
}

/* Tabs inside Modal */
.modal-tabs {
    display: flex;
    border-bottom: 1px solid var(--border-color);
    margin-bottom: 1.5rem;
    gap: 1rem;
}

.modal-tab {
    background: none;
    border: none;
    color: var(--text-muted);
    font-family: inherit;
    font-weight: 500;
    font-size: 0.9rem;
    padding: 0.5rem 0.2rem;
    cursor: pointer;
    position: relative;
    transition: var(--transition-fast);
}

.modal-tab:hover {
    color: #ffffff;
}

.modal-tab.active {
    color: var(--primary-light);
}

.modal-tab.active::after {
    content: '';
    position: absolute;
    bottom: -1px;
    left: 0;
    width: 100%;
    height: 2px;
    background: var(--primary-gradient);
}

.form-group {
    margin-bottom: 1.2rem;
}

.form-group label {
    display: block;
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--text-muted);
    margin-bottom: 0.5rem;
}

.form-input {
    width: 100%;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--border-color);
    border-radius: 10px;
    padding: 0.7rem 0.9rem;
    color: var(--text-main);
    font-family: inherit;
    font-size: 0.9rem;
    outline: none;
    transition: var(--transition-fast);
}

.form-input:focus {
    border-color: var(--primary-color);
    background: rgba(255, 255, 255, 0.08);
}

select.form-input {
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' fill='none' viewBox='0 0 24 24' stroke='%239ca3af'%3E%3Cpath stroke-linecap='round' stroke-linejoin='round' stroke-width='2' d='M19 9l-7 7-7-7'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 0.75rem center;
    background-size: 1rem;
    padding-right: 2.5rem;
}

.modal-actions {
    display: flex;
    justify-content: flex-end;
    gap: 0.75rem;
    margin-top: 2rem;
}

/* Toast System */
.toast-container {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    z-index: 2000;
}

.toast {
    background: rgba(17, 24, 39, 0.9);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 0.85rem 1.25rem;
    display: flex;
    align-items: center;
    gap: 0.8rem;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
    backdrop-filter: blur(10px);
    transform: translateY(20px);
    opacity: 0;
    animation: slideIn 0.3s cubic-bezier(0.4, 0, 0.2, 1) forwards;
    min-width: 280px;
}

@keyframes slideIn {
    to { transform: translateY(0); opacity: 1; }
}

.toast.toast-success {
    border-left: 4px solid var(--success-color);
}

.toast.toast-error {
    border-left: 4px solid var(--danger-color);
}

.toast-icon {
    font-size: 1.1rem;
}

.toast-success .toast-icon { color: var(--success-color); }
.toast-error .toast-icon { color: var(--danger-color); }

.toast-message {
    font-size: 0.85rem;
    font-weight: 500;
}

/* Info Banner Helper */
.info-note {
    font-size: 0.75rem;
    color: var(--text-muted);
    background: rgba(255, 255, 255, 0.02);
    border: 1px dashed var(--border-color);
    padding: 0.5rem;
    border-radius: 6px;
    margin-top: 0.5rem;
}