/* =========================================================================
   IOI SYSTEM — minimalist binary theme (101) — Fully Responsive
   I=1, O=0, I=1 => 101 => 5
   ========================================================================= */

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

:root {
    --bg: #f8f9fa;
    --surface: #ffffff;
    --border: #e9ecef;
    --text: #212529;
    --text-secondary: #6c757d;
    --primary: #0a0a0f;
    --accent: #00ff9d;
    --accent-dim: rgba(0, 255, 157, 0.1);
    --danger: #ff3b30;
    --warning: #ff9f0a;
    --success: #34c759;
    --radius: 6px;
    --font: 'Inter', -apple-system, sans-serif;
    --mono: 'JetBrains Mono', monospace;
    --header-height: auto;
}

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

html { font-size: 16px; }

body {
    font-family: var(--font);
    background: var(--bg);
    color: var(--text);
    line-height: 1.6;
    min-height: 100dvh;
    display: flex;
    flex-direction: column;
}

.container {
    width: 100%;
    max-width: 800px;
    margin: 0 auto;
    padding: 0 clamp(12px, 3vw, 24px);
}

/* ========== LOGIN ========== */
.login-box {
    width: 100%;
    max-width: min(400px, 100%);
    margin: clamp(40px, 10vh, 100px) auto;
    text-align: center;
}

.logo { margin-bottom: clamp(20px, 4vw, 36px); }

.logo-ioi {
    font-family: var(--mono);
    font-size: clamp(40px, 10vw, 72px);
    font-weight: 700;
    color: var(--primary);
    letter-spacing: -0.06em;
    display: block;
    line-height: 1;
}

.logo-sub {
    font-family: var(--mono);
    font-size: clamp(11px, 2vw, 15px);
    font-weight: 500;
    color: var(--text-secondary);
    letter-spacing: 0.5em;
    display: block;
    margin-top: 4px;
}

.logo-binary {
    font-family: var(--mono);
    font-size: clamp(10px, 1.5vw, 13px);
    color: var(--accent);
    background: var(--primary);
    display: inline-block;
    padding: 2px 10px;
    border-radius: 2px;
    margin-top: 8px;
    letter-spacing: 0.3em;
}

.title {
    font-size: clamp(18px, 3vw, 24px);
    font-weight: 600;
    margin-bottom: 6px;
}

.subtitle {
    font-size: clamp(13px, 1.8vw, 15px);
    color: var(--text-secondary);
    margin-bottom: clamp(20px, 4vw, 36px);
}

.btn-google {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    width: 100%;
    padding: clamp(12px, 2vw, 16px) clamp(20px, 3vw, 28px);
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    color: var(--text);
    font-size: clamp(14px, 1.8vw, 16px);
    font-weight: 500;
    text-decoration: none;
    transition: box-shadow 0.2s;
    cursor: pointer;
}

.btn-google:hover { box-shadow: 0 2px 8px rgba(0,0,0,0.08); }

.info-text {
    margin-top: clamp(20px, 4vw, 36px);
    font-size: clamp(11px, 1.4vw, 13px);
    color: var(--text-secondary);
    line-height: 1.7;
}

/* ========== ALERTS ========== */
.alert {
    padding: clamp(12px, 2vw, 18px);
    border-radius: var(--radius);
    margin-bottom: clamp(16px, 2vw, 24px);
    font-size: clamp(13px, 1.6vw, 15px);
    text-align: left;
    word-break: break-word;
}

.alert.error { background: #fff0f0; color: var(--danger); border: 1px solid #ffd7d5; }
.alert.success { background: #f0fff4; color: var(--success); border: 1px solid #d4edda; }
.alert.warn { background: #fffbe6; color: #856404; border: 1px solid #ffeeba; }

/* ========== HEADER ========== */
header {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    align-items: center;
    gap: clamp(8px, 1.5vw, 16px);
    padding: clamp(12px, 2vw, 24px) 0;
    border-bottom: 1px solid var(--border);
    margin-bottom: clamp(20px, 3vw, 36px);
}

.header-left {
    display: flex;
    align-items: center;
    gap: 4px;
    flex-shrink: 0;
}

.logo-ioi-sm {
    font-family: var(--mono);
    font-size: clamp(18px, 2.5vw, 24px);
    font-weight: 700;
    color: var(--primary);
    letter-spacing: -0.08em;
}

.logo-sub-sm {
    font-family: var(--mono);
    font-size: clamp(8px, 1.2vw, 11px);
    color: var(--text-secondary);
    letter-spacing: 0.3em;
    margin-top: 2px;
}

nav {
    display: flex;
    flex-wrap: wrap;
    gap: clamp(6px, 1vw, 12px);
    justify-content: flex-end;
}

.btn-nav {
    padding: clamp(6px, 1vw, 10px) clamp(10px, 1.5vw, 18px);
    font-size: clamp(12px, 1.4vw, 14px);
    font-weight: 500;
    color: var(--text-secondary);
    text-decoration: none;
    border-radius: var(--radius);
    transition: all 0.2s;
    white-space: nowrap;
    min-height: 36px;
    display: inline-flex;
    align-items: center;
}

.btn-nav:hover { background: var(--accent-dim); color: var(--primary); }
.btn-nav-out { color: var(--danger); }
.btn-nav-out:hover { background: #fff0f0; }

/* ========== MAIN ========== */
main {
    flex: 1;
    padding-bottom: clamp(30px, 5vw, 60px);
    width: 100%;
}

h1 {
    font-size: clamp(20px, 3.5vw, 28px);
    font-weight: 700;
    margin-bottom: 4px;
    line-height: 1.2;
}

h2 { font-size: clamp(17px, 2.5vw, 22px); font-weight: 600; }
h3 { font-size: clamp(15px, 2vw, 18px); font-weight: 600; margin-bottom: 12px; }

/* ========== TICKET LIST (DASHBOARD) ========== */
.ticket-list {
    display: flex;
    flex-direction: column;
    gap: clamp(8px, 1.2vw, 14px);
    margin-top: clamp(16px, 2vw, 24px);
}

.ticket-card {
    display: block;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: clamp(12px, 1.8vw, 20px);
    text-decoration: none;
    color: inherit;
    transition: border-color 0.2s, transform 0.15s;
}

.ticket-card:hover { border-color: var(--accent); }

.ticket-card:active {
    transform: scale(0.99);
}

.ticket-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 8px;
    margin-bottom: 4px;
}

.ticket-id {
    font-family: var(--mono);
    font-size: clamp(11px, 1.2vw, 13px);
    color: var(--text-secondary);
}

.ticket-asunto {
    font-size: clamp(14px, 1.6vw, 17px);
    font-weight: 600;
    margin-bottom: 2px;
    line-height: 1.3;
}

.ticket-meta {
    font-size: clamp(11px, 1.2vw, 13px);
    color: var(--text-secondary);
}

/* ========== ESTADOS ========== */
.estado {
    font-size: clamp(10px, 1.1vw, 12px);
    font-weight: 600;
    padding: clamp(2px, 0.4vw, 4px) clamp(8px, 1vw, 12px);
    border-radius: 12px;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    white-space: nowrap;
    display: inline-block;
}

.estado-pendiente { background: #fff3cd; color: #856404; }
.estado-en_curso { background: #cce5ff; color: #004085; }
.estado-resuelto { background: #d4edda; color: #155724; }
.estado-cerrado { background: #e9ecef; color: #495057; }
.estado-online { background: #e8f5e9; color: #2e7d32; }
.estado-presencial { background: #e3f2fd; color: #1565c0; }

/* ========== TICKET DETAIL ========== */
.ticket-detail {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: clamp(16px, 2.5vw, 28px);
}

.ticket-detail-header {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    align-items: center;
    gap: clamp(8px, 1.5vw, 16px);
    margin-bottom: clamp(16px, 2vw, 24px);
}

.ticket-detail h2 {
    font-size: clamp(17px, 2.2vw, 22px);
    margin-bottom: clamp(12px, 1.5vw, 20px);
    word-break: break-word;
}

.ticket-descripcion {
    font-size: clamp(14px, 1.6vw, 16px);
    line-height: 1.7;
    color: #333;
    margin-bottom: clamp(16px, 2vw, 24px);
    white-space: pre-wrap;
    word-break: break-word;
}

/* ========== FORM ========== */
.ticket-form {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: clamp(16px, 2.5vw, 28px);
}

.form-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 0;
}

.field { margin-bottom: clamp(16px, 2vw, 24px); }

.field label {
    display: block;
    font-size: clamp(12px, 1.3vw, 14px);
    font-weight: 600;
    margin-bottom: 4px;
    color: var(--text-secondary);
    letter-spacing: 0.03em;
}

.field input[type="text"],
.field input[type="email"],
.field input[type="password"],
.field textarea,
.field select {
    width: 100%;
    padding: clamp(10px, 1.5vw, 14px);
    font-size: clamp(14px, 1.6vw, 16px);
    font-family: var(--font);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    background: var(--surface);
    transition: border-color 0.2s;
    -webkit-appearance: none;
    appearance: none;
}

.field input:focus,
.field textarea:focus,
.field select:focus { outline: none; border-color: var(--primary); }

.field select {
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8'%3E%3Cpath d='M1 1l5 5 5-5' stroke='%236c757d' stroke-width='1.5' fill='none'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 12px center;
    padding-right: 36px;
}

/* ========== UPLOAD ========== */
.upload-area {
    border: 2px dashed var(--border);
    border-radius: var(--radius);
    padding: clamp(24px, 4vw, 48px) clamp(16px, 2vw, 24px);
    text-align: center;
    cursor: pointer;
    transition: border-color 0.2s, background 0.2s;
}

.upload-area:hover,
.upload-area.drag-over {
    border-color: var(--accent);
    background: var(--accent-dim);
}

.upload-area p { font-size: clamp(13px, 1.4vw, 15px); }

.upload-hint {
    font-size: clamp(11px, 1.2vw, 13px);
    color: var(--text-secondary);
    margin-top: 6px;
}

.preview-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(clamp(80px, 12vw, 110px), 1fr));
    gap: clamp(8px, 1vw, 12px);
    margin-top: clamp(12px, 1.5vw, 20px);
}

.preview-item {
    aspect-ratio: 1;
    border-radius: var(--radius);
    overflow: hidden;
    border: 1px solid var(--border);
}

.preview-item img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

/* ========== BUTTON ========== */
.btn-primary {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 100%;
    padding: clamp(12px, 1.8vw, 16px) clamp(20px, 3vw, 36px);
    background: var(--primary);
    color: var(--accent);
    font-family: var(--mono);
    font-size: clamp(13px, 1.5vw, 15px);
    font-weight: 600;
    letter-spacing: 0.12em;
    border: none;
    border-radius: var(--radius);
    cursor: pointer;
    text-decoration: none;
    transition: opacity 0.2s;
    min-height: 44px;
}

.btn-primary:hover { opacity: 0.85; }

/* ========== EMPTY STATE ========== */
.empty-state {
    text-align: center;
    padding: clamp(40px, 8vw, 80px) clamp(16px, 2vw, 24px);
    color: var(--text-secondary);
}

.empty-state p { margin-bottom: clamp(16px, 2vw, 24px); }

/* ========== IMAGES GRID ========== */
.imagenes-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(clamp(120px, 18vw, 160px), 1fr));
    gap: clamp(8px, 1.2vw, 14px);
    margin: clamp(12px, 2vw, 20px) 0;
}

.imagen-item {
    border-radius: var(--radius);
    overflow: hidden;
    border: 1px solid var(--border);
}

.imagen-item img { width: 100%; display: block; }

/* ========== STATS (ADMIN) ========== */
.stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(min(140px, 100%), 1fr));
    gap: clamp(10px, 1.5vw, 18px);
    margin: clamp(16px, 2vw, 24px) 0;
}

.stat-card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: clamp(16px, 2vw, 24px);
    text-align: center;
    font-size: clamp(12px, 1.3vw, 14px);
    color: var(--text-secondary);
}

.stat-num {
    display: block;
    font-family: var(--mono);
    font-size: clamp(24px, 4vw, 36px);
    font-weight: 700;
    color: var(--primary);
    margin-bottom: 2px;
}

.stat-num.warning { color: var(--warning); }

/* ========== ADMIN TABLE ========== */
.admin-table-wrap {
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    margin-top: clamp(12px, 1.5vw, 20px);
    border-radius: var(--radius);
    border: 1px solid var(--border);
}

.admin-table {
    width: 100%;
    border-collapse: collapse;
    font-size: clamp(12px, 1.3vw, 14px);
    min-width: 600px;
}

.admin-table th,
.admin-table td {
    padding: clamp(10px, 1.2vw, 14px);
    text-align: left;
    border-bottom: 1px solid var(--border);
    vertical-align: middle;
}

.admin-table th {
    font-size: clamp(10px, 1.1vw, 12px);
    font-weight: 600;
    color: var(--text-secondary);
    letter-spacing: 0.08em;
    text-transform: uppercase;
}

.admin-table tr:hover td { background: #f8f9fa; }
.admin-table tr:last-child td { border-bottom: none; }

/* ========== ADMIN TICKET INFO ========== */
.admin-ticket-info {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: clamp(16px, 2vw, 24px);
    margin-bottom: clamp(16px, 2vw, 24px);
}

.info-row {
    padding: clamp(6px, 0.8vw, 10px) 0;
    border-bottom: 1px solid var(--border);
    font-size: clamp(13px, 1.4vw, 15px);
    word-break: break-word;
}

.info-row:last-child { border-bottom: none; }

.estado-form {
    display: flex;
    flex-wrap: wrap;
    gap: clamp(8px, 1vw, 14px);
    align-items: center;
    margin: clamp(12px, 1.5vw, 20px) 0;
}

.estado-form select {
    flex: 1;
    min-width: 140px;
    padding: clamp(10px, 1.2vw, 14px);
    font-size: clamp(13px, 1.4vw, 15px);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    -webkit-appearance: none;
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8'%3E%3Cpath d='M1 1l5 5 5-5' stroke='%236c757d' stroke-width='1.5' fill='none'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 12px center;
    padding-right: 36px;
}

.estado-form .btn-primary {
    flex: 0 0 auto;
    width: auto;
    min-width: 120px;
}

/* ========== RESPONSES ========== */
.respuestas-list {
    display: flex;
    flex-direction: column;
    gap: clamp(12px, 1.5vw, 18px);
    margin: clamp(12px, 1.5vw, 20px) 0;
}

.respuesta {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: clamp(12px, 1.5vw, 20px);
}

.respuesta-admin {
    border-left: 3px solid var(--accent);
    background: var(--accent-dim);
}

.respuesta-user {
    border-left: 3px solid var(--primary);
}

.respuesta-header {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: clamp(6px, 0.8vw, 10px);
    margin-bottom: clamp(6px, 0.8vw, 10px);
    font-size: clamp(12px, 1.3vw, 14px);
}

.respuesta-role {
    font-size: clamp(9px, 1vw, 11px);
    font-weight: 600;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    padding: 2px clamp(6px, 0.7vw, 10px);
    border-radius: 10px;
    background: var(--primary);
    color: var(--accent);
}

.respuesta-user .respuesta-role {
    background: var(--border);
    color: var(--text-secondary);
}

.respuesta-fecha {
    margin-left: auto;
    font-size: clamp(10px, 1.1vw, 12px);
    color: var(--text-secondary);
}

.respuesta-body {
    font-size: clamp(13px, 1.4vw, 15px);
    line-height: 1.7;
    white-space: pre-wrap;
    word-break: break-word;
}

.respuesta-form {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: clamp(16px, 2vw, 24px);
    margin: clamp(12px, 1.5vw, 20px) 0;
}

.respuesta-form textarea {
    width: 100%;
    padding: clamp(10px, 1.2vw, 14px);
    font-size: clamp(14px, 1.5vw, 16px);
    font-family: var(--font);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    resize: vertical;
    margin-bottom: clamp(10px, 1.2vw, 16px);
    transition: border-color 0.2s;
}

.respuesta-form textarea:focus {
    outline: none;
    border-color: var(--primary);
}

/* ========== MISC ========== */
.text-muted {
    color: var(--text-secondary);
    font-size: clamp(12px, 1.3vw, 14px);
}

.divider {
    display: flex;
    align-items: center;
    text-align: center;
    margin: clamp(20px, 3vw, 32px) 0;
    color: var(--text-secondary);
    font-size: clamp(12px, 1.3vw, 14px);
    letter-spacing: 0.12em;
}

.divider::before, .divider::after {
    content: "";
    flex: 1;
    border-bottom: 1px solid var(--border);
}

.divider span { padding: 0 clamp(10px, 1.5vw, 16px); }

.form-title {
    font-size: clamp(14px, 1.8vw, 17px);
    font-weight: 500;
    margin: 0 0 clamp(12px, 1.5vw, 20px);
    color: var(--text);
    letter-spacing: 0.06em;
}

.checkbox-field { margin-bottom: clamp(16px, 2vw, 24px); }

.checkbox-label {
    display: flex;
    align-items: flex-start;
    gap: clamp(6px, 0.8vw, 10px);
    font-size: clamp(11px, 1.2vw, 13px);
    color: var(--text-secondary);
    line-height: 1.6;
    cursor: pointer;
}

.checkbox-label input[type=checkbox] {
    margin-top: 3px;
    flex-shrink: 0;
    width: clamp(16px, 1.5vw, 20px);
    height: clamp(16px, 1.5vw, 20px);
    accent-color: var(--primary);
    cursor: pointer;
}

.checkbox-label a { color: var(--primary); text-decoration: underline; }
.checkbox-label a:hover { opacity: 0.7; }

/* ========== RESPONSIVE ========== */

/* Tablets & small screens */
@media (max-width: 768px) {
    .admin-table { min-width: 0; }
    .admin-table thead { display: none; }
    .admin-table tr {
        display: grid;
        grid-template-columns: 1fr 1fr;
        gap: 4px 12px;
        padding: clamp(12px, 2vw, 18px);
        border-bottom: 1px solid var(--border);
    }
    .admin-table tr:last-child { border-bottom: none; }
    .admin-table td {
        display: block;
        padding: 2px 0;
        border: none;
        font-size: clamp(12px, 2vw, 14px);
    }
    .admin-table td::before {
        content: attr(data-label);
        display: block;
        font-size: clamp(9px, 1.2vw, 10px);
        font-weight: 600;
        color: var(--text-secondary);
        letter-spacing: 0.05em;
        text-transform: uppercase;
        margin-bottom: 1px;
    }
    .admin-table td:last-child {
        grid-column: 1 / -1;
    }
    .admin-table tr:hover td { background: transparent; }
    .admin-table-wrap { border: none; }
}

/* Mobile */
@media (max-width: 600px) {
    header {
        flex-direction: column;
        text-align: center;
    }
    nav { justify-content: center; }
    .ticket-detail-header { flex-direction: column; align-items: flex-start; }
    .estado-form { flex-direction: column; }
    .estado-form select { width: 100%; }
    .estado-form .btn-primary { width: 100%; }
    .respuesta-header { flex-direction: column; align-items: flex-start; }
    .respuesta-fecha { margin-left: 0; }

    .admin-table tr {
        grid-template-columns: 1fr;
    }
}

/* Small phones */
@media (max-width: 400px) {
    .container { padding: 0 clamp(8px, 2vw, 12px); }
    .ticket-card { padding: 12px; }
    .ticket-form, .ticket-detail, .respuesta-form { padding: 14px; }
    .btn-nav {
        font-size: 11px;
        padding: 6px 10px;
    }
}

/* Landscape phones */
@media (max-height: 500px) and (orientation: landscape) {
    .login-box { margin: 16px auto; }
    .logo { margin-bottom: 12px; }
    .logo-ioi { font-size: 32px; }
    .logo-binary { display: none; }
    header { padding: 8px 0; margin-bottom: 16px; }
}

/* Large screens (wider forms) */
@media (min-width: 900px) {
    .ticket-form .form-grid {
        grid-template-columns: 1fr 1fr;
        gap: 0 20px;
    }
    .ticket-form .form-grid .field:last-child {
        grid-column: 1 / -1;
    }
}

/* High DPI screens */
@media (min-width: 1400px) {
    .container { max-width: 900px; }
}

/* Print */
@media print {
    header, nav, .btn-nav, .btn-primary, .estado-form,
    .respuesta-form, .upload-area { display: none; }
    body { background: white; }
    .ticket-detail, .admin-ticket-info { border: 1px solid #ddd; box-shadow: none; }
}

/* Flatpickr calendar */
.field-row { display: flex; gap: 8px; align-items: center; }
.field-row .calendar-input { flex: 1; }
.calendar-input { cursor: pointer; background: var(--surface); }
.flatpickr-calendar { font-family: var(--font); }