/* ============================================================
   VERSIÓN RESPONSIVE OPTIMIZADA
   ============================================================ */

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

:root {
    --bg-dark: #0d0d0d;
    --bg-darker: #050505;
    --bg-panel: #1a1a1a;
    --text-primary: #e8e8e8;
    --text-secondary: #a0a0a0;
    --text-dim: #666666;
    --accent-orange: #d97706;
    --accent-blue: #4a5568;
    --border-main: #2a2a2a;
    --border-accent: #3a3a3a;
}

body {
    font-family: 'IBM Plex Mono', monospace;
    background: var(--bg-darker);
    color: var(--text-primary);
    overflow-x: hidden;
    line-height: 1.5;
}

/* Textura sutil de ruido */
body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 400 400' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noiseFilter'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='4' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noiseFilter)'/%3E%3C/svg%3E");
    opacity: 0.03;
    pointer-events: none;
    z-index: 9999;
}

/* ============================================================
   HEADER - RESPONSIVE
   ============================================================ */

header {
    position: sticky;
    top: 0;
    padding: 0.75rem 0;
    border-bottom: 1px solid var(--border-main);
    background: rgba(5, 5, 5, 0.95);
    backdrop-filter: blur(10px);
    z-index: 100;
}

.header-content {
    max-width: 1600px;
    margin: 0 auto;
    padding: 0 1rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 1rem;
}

.logo {
    font-family: 'Archivo Black', sans-serif;
    font-size: clamp(1.2rem, 5vw, 2.5rem);
    letter-spacing: -0.02em;
    color: var(--text-primary);
    font-weight: 900;
    text-transform: uppercase;
}

.logo span { 
    color: var(--accent-orange); 
}

.stats { 
    display: flex; 
    gap: 1.5rem; 
    font-family: 'JetBrains Mono', monospace; 
}

.stat-item { 
    display: flex; 
    flex-direction: column; 
    align-items: flex-end; 
}

.stat-label {
    font-size: 0.6rem;
    color: var(--text-dim);
    letter-spacing: 0.15em;
    text-transform: uppercase;
    margin-bottom: 0.25rem;
}

.stat-value {
    font-size: clamp(1.2rem, 4vw, 1.8rem);
    font-weight: 300;
    color: var(--text-primary);
    letter-spacing: 0.05em;
}

/* ============================================================
   CONTAINER - MOBILE FIRST RESPONSIVE
   ============================================================ */

html, body {
    height: 100%;
    overflow-x: hidden;
}

.container {
    position: relative;
    max-width: 1600px;
    margin: 0 auto;
    padding: 1rem;
    display: grid;
    gap: 1rem;
    z-index: 1;
    
    /* MOBILE: Una columna */
    grid-template-columns: 1fr;
    grid-template-areas:
        "main"
        "info"
        "sidebar";
    min-height: calc(100vh - 100px);
}

/* Asignar áreas del grid */
.container > aside:first-of-type {
    grid-area: sidebar;
}

.main-content {
    grid-area: main;
}

.info-panel {
    grid-area: info;
}

/* ============================================================
   TABLET: 768px+
   ============================================================ */

@media (min-width: 768px) {
    .header-content {
        padding: 0 2rem;
        gap: 1.5rem;
    }
    
    .stats { 
        gap: 2.5rem; 
    }
    
    .container {
        padding: 1rem 1.5rem;
        gap: 1.5rem;
        /* TABLET: Dos columnas - sidebar abajo */
        grid-template-columns: 1fr 300px;
        grid-template-areas:
            "main info"
            "sidebar sidebar";
    }
}

/* ============================================================
   DESKTOP: 1024px+
   ============================================================ */

@media (min-width: 1024px) {
    .container {
        padding: 1rem 2rem;
        gap: 2rem;
        /* DESKTOP: Tres columnas original */
        grid-template-columns: 220px 1fr 270px;
        grid-template-areas: "sidebar main info";
        height: calc(100vh - 120px);
        overflow: hidden;
    }
    
    .container > aside {
        height: 100%;
        overflow-y: auto;
    }
    
    .info-panel {
        position: sticky;
        top: 7rem;
        height: fit-content;
        max-height: calc(100vh - 140px);
        overflow-y: auto;
    }
}

/* ============================================================
   DESKTOP GRANDE: 1400px+
   ============================================================ */

@media (min-width: 1400px) {
    .container {
        grid-template-columns: 280px 1fr 300px;
    }
    
    .stats { 
        gap: 3rem; 
    }
}

/* ============================================================
   PANELS Y CARDS
   ============================================================ */

.panel { 
    background: var(--bg-panel); 
    border: 1px solid var(--border-main); 
}

.panel-header {
    padding: 1rem 1.25rem;
    border-bottom: 1px solid var(--border-main);
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.75rem;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--text-secondary);
    font-weight: 600;
}

.level-item {
    padding: 1rem;
    margin-bottom: 1px;
    background: var(--bg-dark);
    border-left: 2px solid transparent;
    cursor: pointer;
    transition: all 0.15s ease;
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.85rem;
}

.level-item:hover { 
    border-left-color: var(--text-secondary); 
    background: var(--bg-panel); 
}

.level-item.active { 
    border-left-color: var(--accent-orange); 
    background: var(--bg-panel); 
}

.level-item.locked { 
    opacity: 0.3; 
    cursor: not-allowed; 
}

/* ============================================================
   MAIN CONTENT - RESPONSIVE
   ============================================================ */

.main-content { 
    display: flex; 
    flex-direction: column; 
    gap: 1.5rem;
    width: 100%;
}

@media (min-width: 1024px) {
    .main-content {
        flex: 1;
        height: 100%;
        overflow: hidden;
    }
}

.challenge-card {
    background: var(--bg-panel);
    border: 1px solid var(--border-main);
    padding: 1.5rem;
}

@media (min-width: 768px) {
    .challenge-card {
        padding: 2rem;
    }
}

@media (min-width: 1024px) {
    .challenge-card {
        padding: 2.5rem;
    }
}

.challenge-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 1.5rem;
    gap: 1rem;
    flex-wrap: wrap;
}

@media (min-width: 768px) {
    .challenge-header {
        margin-bottom: 2rem;
        gap: 2rem;
    }
}

.challenge-title {
    font-family: 'Archivo Black', sans-serif;
    font-size: clamp(1.5rem, 5vw, 3rem);
    letter-spacing: -0.02em;
    line-height: 1.1;
    color: var(--text-primary);
    font-weight: 900;
    text-transform: uppercase;
}

.challenge-points {
    font-family: 'JetBrains Mono', monospace;
    font-size: clamp(1.8rem, 5vw, 2.5rem);
    font-weight: 300;
    color: var(--accent-orange);
    white-space: nowrap;
}

.challenge-desc {
    font-size: 0.9rem;
    line-height: 1.7;
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
    max-width: 100%;
}

@media (min-width: 768px) {
    .challenge-desc {
        font-size: 0.95rem;
        margin-bottom: 2rem;
        max-width: 600px;
    }
}

.challenge-meta {
    display: flex;
    gap: 1.5rem;
    font-size: 0.75rem;
    padding-top: 1rem;
    border-top: 1px solid var(--border-main);
    color: var(--text-dim);
    font-weight: 300;
    flex-wrap: wrap;
}

@media (min-width: 768px) {
    .challenge-meta {
        gap: 2.5rem;
        font-size: 0.8rem;
        padding-top: 1.5rem;
    }
}

/* ============================================================
   TERMINAL - RESPONSIVE
   ============================================================ */

.terminal-container { 
    background: var(--bg-dark); 
    border: 1px solid var(--border-main);
    display: flex;
    flex-direction: column;
}

@media (min-width: 1024px) {
    .terminal-container {
        flex: 1;
        height: 100%;
        overflow: hidden;
    }
}

.terminal-header {
    background: var(--bg-panel);
    padding: 0.75rem 1rem;
    font-family: 'JetBrains Mono', monospace;
    font-weight: 400;
    font-size: 0.7rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid var(--border-main);
    color: var(--text-secondary);
}

@media (min-width: 768px) {
    .terminal-header {
        padding: 0.75rem 1.25rem;
        font-size: 0.75rem;
    }
}

.terminal-dots { 
    display: flex; 
    gap: 0.5rem; 
}

.dot { 
    width: 8px; 
    height: 8px; 
    border-radius: 50%; 
    background: var(--border-accent); 
}

.terminal-content {
    padding: 1rem;
    height: 400px;
    overflow-y: auto;
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.8rem;
    line-height: 1.8;
}

@media (min-width: 768px) {
    .terminal-content {
        padding: 1.5rem;
        height: 500px;
        font-size: 0.85rem;
    }
}

@media (min-width: 1024px) {
    .terminal-content {
        padding: 2rem;
        flex: 1;
        height: auto;
        max-height: none;
    }
}

.message { 
    margin-bottom: 1.5rem; 
    animation: messageIn 0.2s ease;
    word-wrap: break-word;
    overflow-wrap: break-word;
}

@media (min-width: 768px) {
    .message {
        margin-bottom: 2rem;
    }
}

@keyframes messageIn {
    from { opacity: 0; transform: translateY(5px); }
    to { opacity: 1; transform: translateY(0); }
}

.message-user { color: var(--accent-blue); }
.message-user::before { content: '→ '; color: var(--text-dim); margin-right: 0.5rem; }
.message-ai { color: var(--text-secondary); }
.message-ai::before { content: '← '; color: var(--text-dim); margin-right: 0.5rem; }
.message-flag { color: var(--accent-orange); font-weight: 400; }
.message-tool-error { 
    background: #2a1515; 
    border-left: 3px solid #dc2626; 
    padding: 1rem; 
    margin: 1rem 0; 
    font-family: monospace; 
    white-space: pre-wrap; 
    color: #fca5a5;
    overflow-x: auto;
}
.message-tool-success { 
    background: #1a2a1a; 
    border-left: 3px solid #22c55e; 
    padding: 1rem; 
    margin: 1rem 0; 
    font-family: monospace; 
    white-space: pre-wrap; 
    color: #86efac; 
    overflow-x: auto; 
    max-width: 100%; 
}

/* ============================================================
   TERMINAL INPUT - RESPONSIVE
   ============================================================ */

.terminal-input-area {
    padding: 1rem;
    background: var(--bg-dark);
    border-top: 1px solid var(--border-main);
    display: flex;
    gap: 0.75rem;
    align-items: center;
    flex-wrap: wrap;
}

@media (min-width: 768px) {
    .terminal-input-area {
        padding: 1.25rem 2rem;
        gap: 1rem;
        flex-wrap: nowrap;
    }
}

.terminal-prompt { 
    color: var(--text-dim); 
    font-family: 'JetBrains Mono', monospace; 
    font-size: 0.85rem;
    display: none;
}

@media (min-width: 768px) {
    .terminal-prompt {
        display: block;
    }
}

.terminal-input {
    flex: 1;
    min-width: 0;
    background: transparent;
    border: none;
    color: var(--text-primary);
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.85rem;
    outline: none;
    width: 100%;
}

/* ============================================================
   BUTTONS - RESPONSIVE
   ============================================================ */

.btn {
    padding: 0.65rem 1.25rem;
    background: var(--text-primary);
    color: var(--bg-dark);
    border: none;
    font-family: 'JetBrains Mono', monospace;
    font-weight: 600;
    font-size: 0.7rem;
    cursor: pointer;
    transition: all 0.2s ease;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    white-space: nowrap;
}

@media (min-width: 768px) {
    .btn {
        padding: 0.65rem 1.5rem;
        font-size: 0.75rem;
    }
}

.btn:hover { 
    background: var(--accent-orange); 
    color: var(--bg-dark); 
}

.btn-ghost { 
    background: transparent; 
    color: var(--text-secondary); 
    border: 1px solid var(--border-accent); 
}

.btn-ghost:hover { 
    background: var(--bg-panel); 
    color: var(--text-primary); 
    border-color: var(--text-dim); 
}

.controls {
    padding: 1rem;
    border-top: 1px solid var(--border-main);
}

@media (min-width: 768px) {
    .controls {
        padding: 1rem 2rem;
    }
}

.controls-left {
    display: flex;
    gap: 0.5rem;
}

/* ============================================================
   FLAG PANEL - RESPONSIVE
   ============================================================ */

.flag-panel {
    background: var(--bg-panel);
    border: 1px solid var(--border-main);
    padding: 1.5rem;
}

@media (min-width: 768px) {
    .flag-panel {
        padding: 2rem;
    }
}

.flag-header {
    font-family: 'JetBrains Mono', monospace;
    font-weight: 600;
    font-size: 0.75rem;
    color: var(--text-secondary);
    margin-bottom: 1.25rem;
    text-transform: uppercase;
}

.flag-input-group { 
    display: flex; 
    gap: 0.75rem;
    flex-direction: column;
}

@media (min-width: 768px) {
    .flag-input-group {
        flex-direction: row;
        gap: 1rem;
    }
}

.flag-input {
    flex: 1;
    padding: 0.8rem 1rem;
    background: var(--bg-dark);
    border: 1px solid var(--border-accent);
    color: var(--text-primary);
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.85rem;
    outline: none;
    width: 100%;
}

.flag-input:focus {
    border-color: var(--accent-orange);
}

.progress-bar-container { 
    background: var(--bg-dark); 
    height: 2px; 
    margin-top: 1.5rem; 
    position: relative; 
    overflow: hidden; 
}

#progress-bar { 
    height: 100%; 
    background: var(--accent-orange); 
    transition: width 0.3s ease; 
}

/* ============================================================
   INFO PANEL - RESPONSIVE
   ============================================================ */

.info-panel {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.info-card { 
    background: var(--bg-panel); 
    border: 1px solid var(--border-main); 
}

.info-card-content { 
    padding: 1rem; 
    font-size: 0.8rem; 
    line-height: 1.7; 
}

@media (min-width: 768px) {
    .info-card-content {
        padding: 1.25rem;
    }
}

/* Compact challenge info */
.challenge-info-compact {
    display: flex;
    gap: 1rem;
    margin-bottom: 1rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid var(--border-main);
}

.info-row {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.info-label {
    font-size: 0.65rem;
    color: var(--text-dim);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

@media (min-width: 768px) {
    .info-label {
        font-size: 0.7rem;
    }
}

.info-value {
    font-size: 0.85rem;
    color: var(--text-primary);
    font-weight: 600;
}

@media (min-width: 768px) {
    .info-value {
        font-size: 0.9rem;
    }
}

.challenge-desc-compact {
    font-size: 0.8rem;
    line-height: 1.5;
    color: var(--text-secondary);
}

@media (min-width: 768px) {
    .challenge-desc-compact {
        font-size: 0.85rem;
    }
}

.flag-input-compact {
    width: 100%;
    padding: 0.75rem;
    background: var(--bg-dark);
    border: 1px solid var(--border-main);
    color: var(--text-primary);
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.85rem;
    margin-bottom: 0.75rem;
}

.flag-input-compact:focus {
    outline: none;
    border-color: var(--accent-orange);
}

.btn-full {
    width: 100%;
}

/* ============================================================
   MODAL - RESPONSIVE
   ============================================================ */

.modal {
    position: fixed;
    inset: 0;
    background: rgba(5, 5, 5, 0.95);
    display: none;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    backdrop-filter: blur(10px);
    padding: 1rem;
}

#success-modal.active { 
    display: flex; 
}

.modal-content {
    background: var(--bg-panel);
    border: 1px solid var(--border-main);
    padding: 2rem;
    max-width: 90%;
    width: 100%;
    text-align: center;
}

@media (min-width: 768px) {
    .modal-content {
        padding: 3rem;
        max-width: 500px;
    }
}

.modal-icon { 
    font-size: 2.5rem; 
    margin-bottom: 1rem; 
}

@media (min-width: 768px) {
    .modal-icon {
        font-size: 3rem;
        margin-bottom: 1.5rem;
    }
}

.modal-title { 
    font-family: 'Archivo Black', sans-serif; 
    font-size: clamp(1.5rem, 5vw, 2rem); 
    color: var(--text-primary); 
    margin-bottom: 1rem; 
    text-transform: uppercase; 
}

.modal-message {
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin-bottom: 1rem;
}

.modal-points {
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.9rem;
    font-weight: 300;
    color: var(--accent-orange);
    margin: 1.5rem 0;
}

@media (min-width: 768px) {
    .modal-points {
        font-size: 1rem;
        margin: 2rem 0;
    }
}

/* ============================================================
   ANIMATIONS
   ============================================================ */

.panel, .challenge-card, .terminal-container, .flag-panel { 
    animation: fadeIn 0.4s ease; 
}

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

/* ============================================================
   SCROLLBAR PERSONALIZADO
   ============================================================ */

.terminal-content::-webkit-scrollbar,
.info-panel::-webkit-scrollbar,
.container > aside::-webkit-scrollbar {
    width: 8px;
}

.terminal-content::-webkit-scrollbar-track,
.info-panel::-webkit-scrollbar-track,
.container > aside::-webkit-scrollbar-track {
    background: var(--bg-dark);
}

.terminal-content::-webkit-scrollbar-thumb,
.info-panel::-webkit-scrollbar-thumb,
.container > aside::-webkit-scrollbar-thumb {
    background: var(--border-accent);
    border-radius: 4px;
}

.terminal-content::-webkit-scrollbar-thumb:hover,
.info-panel::-webkit-scrollbar-thumb:hover,
.container > aside::-webkit-scrollbar-thumb:hover {
    background: var(--text-dim);
}

/* ============================================================
   UTILIDADES MÓVILES
   ============================================================ */

@media (max-width: 767px) {
    /* Ocultar elementos no críticos en móvil si es necesario */
    body {
        overflow-y: auto;
    }
    
    html, body {
        height: auto;
        overflow: auto;
    }
    
    .container {
        min-height: auto;
    }
}
.modal-close {
    position: absolute;
    top: 10px;
    right: 15px;
    font-size: 50px;
    cursor: pointer;
    color: #888;
    line-height: 1;
}

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