/* ==========================================================================
   1. DESIGN SYSTEM SYSTEM PARAMETERS & ROOT TOKENS
   ========================================================================== */
:root {
    --bg-darkest: #070a13;
    --bg-panel: #0d1324;
    --bg-card: rgba(22, 32, 59, 0.65);
    --bg-card-hover: rgba(30, 43, 77, 0.85);
    --border-glass: rgba(255, 255, 255, 0.07);
    --accent-cyan: #38bdf8;
    --accent-blue: #2563eb;
    --text-primary: #f8fafc;
    --text-secondary: #94a3b8;
    --text-error: #f87171;
    --text-success: #34d399;
    --transition-smooth: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Base Optimization Reset */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Segoe UI', -apple-system, BlinkMacSystemFont, Roboto, sans-serif;
    -webkit-font-smoothing: antialiased;
}

body {
    background-color: var(--bg-darkest);
    color: var(--text-primary);
    min-height: 100vh;
    overflow-x: hidden;
}

/* ==========================================================================
   2. REUSABLE UI ENGINE COMPONENTS & UTILITIES
   ========================================================================== */
.app-view {
    display: none;
    min-height: 100vh;
    animation: fadeIn 0.3s ease-out forwards;
}

.app-view.active {
    display: block;
}

.hidden { display: none !important; }

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(4px); }
    to { opacity: 1; transform: translateY(0); }
}

/* Form Typography Configurations */
h1 { font-size: 3rem; font-weight: 800; letter-spacing: -1px; margin-bottom: 1rem; }
h2 { font-size: 1.75rem; font-weight: 700; margin-bottom: 0.5rem; }
h3 { font-size: 1.2rem; font-weight: 600; margin-bottom: 1rem; color: var(--text-primary); }
p { color: var(--text-secondary); line-height: 1.6; }
.subtitle { font-size: 0.9rem; color: var(--text-secondary); margin-bottom: 1.5rem; }
.badge { display: inline-block; padding: 0.25rem 0.75rem; background: rgba(56, 189, 248, 0.1); border: 1px solid rgba(56, 189, 248, 0.2); border-radius: 20px; color: var(--accent-cyan); font-size: 0.8rem; font-weight: 600; margin-bottom: 1.5rem; }

/* Interactive Elements (Buttons) */
.btn {
    padding: 0.65rem 1.25rem;
    border-radius: 8px;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition-smooth);
    border: none;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-size: 0.9rem;
}

.btn-primary {
    background: linear-gradient(135deg, var(--accent-blue), #1d4ed8);
    color: #fff;
    box-shadow: 0 4px 14px rgba(37, 99, 235, 0.3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(37, 99, 235, 0.45);
}

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

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.1);
    transform: translateY(-2px);
}

.btn-text { background: transparent; color: var(--text-secondary); }
.btn-text:hover { color: var(--text-primary); }
.btn-block { width: 100%; display: flex; }
.btn-lg { padding: 0.85rem 2rem; font-size: 1rem; }

/* Input Field Elements */
.input-group {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    margin-bottom: 1.25rem;
    width: 100%;
}

.input-group label {
    font-size: 0.8rem;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    font-weight: 600;
}

.input-group input {
    background: rgba(7, 10, 19, 0.5);
    border: 1px solid var(--border-glass);
    padding: 0.75rem 1rem;
    border-radius: 8px;
    color: #fff;
    font-size: 0.95rem;
    transition: var(--transition-smooth);
}

.input-group input:focus {
    outline: none;
    border-color: var(--accent-cyan);
    box-shadow: 0 0 0 2px rgba(56, 189, 248, 0.15);
}

/* ==========================================================================
   3. VIEW STATE ARCHITECTURES (LANDING, AUTH, DIALOGS)
   ========================================================================== */
/* Landing Component Framework */
.public-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.5rem 4rem;
    border-bottom: 1px solid var(--border-glass);
    background: rgba(7, 10, 19, 0.8);
    backdrop-filter: blur(12px);
    position: sticky;
    top: 0;
    z-index: 10;
}

.logo {
    font-size: 1.4rem;
    font-weight: 800;
    color: #fff;
    letter-spacing: -0.5px;
}

.logo span { color: var(--accent-cyan); }
.public-nav { display: flex; gap: 1rem; }

.landing-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 6rem 2rem;
}

.hero { text-align: center; max-width: 800px; margin: 0 auto 6rem auto; }
.hero h1 { font-size: 3.5rem; background: linear-gradient(to right, #fff, var(--text-secondary)); -webkit-background-clip: text; -webkit-text-fill-color: transparent; }
.hero p { font-size: 1.2rem; margin-bottom: 2.5rem; }
.hero-cta { display: flex; gap: 1.5rem; justify-content: center; }

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 2rem;
}

.feature-card {
    background: var(--bg-card);
    border: 1px solid var(--border-glass);
    padding: 2.5rem 2rem;
    border-radius: 16px;
    backdrop-filter: blur(8px);
    transition: var(--transition-smooth);
}

.feature-card:hover {
    transform: translateY(-5px);
    background: var(--bg-card-hover);
    border-color: rgba(56, 189, 248, 0.2);
}

.public-footer { text-align: center; padding: 3rem; border-top: 1px solid var(--border-glass); margin-top: 4rem; color: var(--text-secondary); font-size: 0.85rem; }

/* Secure Gateway Frame (Authentication Card) */
.auth-wrapper {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 2rem;
    background: radial-gradient(circle at 50% 50%, rgba(37, 99, 235, 0.1), transparent 60%);
}

.auth-card {
    background: var(--bg-panel);
    border: 1px solid var(--border-glass);
    width: 100%;
    max-width: 460px;
    border-radius: 20px;
    padding: 2.5rem;
    box-shadow: 0 20px 40px rgba(0,0,0,0.4);
}

.back-link {
    background: none; border: none; color: var(--text-secondary); cursor: pointer; font-size: 0.85rem; margin-bottom: 1.5rem; transition: var(--transition-smooth);
}
.back-link:hover { color: var(--accent-cyan); }
.auth-switch { text-align: center; font-size: 0.9rem; margin-top: 1.5rem; color: var(--text-secondary); }
.auth-switch span { color: var(--accent-cyan); cursor: pointer; font-weight: 600; }
.auth-switch span:hover { text-decoration: underline; }

/* ==========================================================================
   4. APPARATUS DASHBOARD COMPONENT MATRIX
   ========================================================================== */
.dashboard-layout {
    display: flex;
    height: 100vh;
    overflow: hidden;
}

.sidebar {
    width: 280px;
    background: var(--bg-panel);
    border-right: 1px solid var(--border-glass);
    padding: 2rem 1.5rem;
    display: flex;
    flex-direction: column;
}

.user-profile-summary {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1.25rem 0;
    margin: 1.5rem 0;
    border-top: 1px solid var(--border-glass);
    border-bottom: 1px solid var(--border-glass);
}

.user-profile-summary .avatar {
    width: 44px; height: 44px; background: linear-gradient(135deg, var(--accent-cyan), var(--accent-blue)); border-radius: 50%; display: flex; align-items: center; justify-content: center; font-weight: 700; color: var(--bg-darkest); font-size: 1.1rem;
}

.user-profile-summary .meta { display: flex; flex-direction: column; overflow: hidden; }
.user-profile-summary .name { font-weight: 600; font-size: 0.95rem; text-overflow: ellipsis; overflow: hidden; white-space: nowrap; }
.user-profile-summary .status-indicator { font-size: 0.75rem; color: var(--text-success); display: flex; align-items: center; gap: 4px; }

.sidebar-nav { display: flex; flex-direction: column; gap: 0.5rem; flex-grow: 1; }
.nav-btn {
    background: transparent; border: none; color: var(--text-secondary); padding: 0.8rem 1rem; border-radius: 8px; text-align: left; font-size: 0.95rem; font-weight: 600; cursor: pointer; transition: var(--transition-smooth); width: 100%;
}
.nav-btn:hover { background: rgba(255,255,255,0.03); color: #fff; }
.nav-btn.active { background: rgba(56, 189, 248, 0.08); color: var(--accent-cyan); border-left: 3px solid var(--accent-cyan); border-radius: 0 8px 8px 0; padding-left: calc(1rem - 3px); }

.btn-logout { background: none; border: 1px solid rgba(248, 113, 113, 0.2); color: var(--text-error); padding: 0.75rem; border-radius: 8px; cursor: pointer; font-weight: 600; transition: var(--transition-smooth); }
.btn-logout:hover { background: rgba(248, 113, 113, 0.08); }

/* Dashboard Core Viewport */
.dashboard-main {
    flex-grow: 1;
    padding: 2.5rem;
    overflow-y: auto;
    background: #090e1a;
}

.dashboard-panel { display: none; animation: fadeIn 0.25s ease-out forwards; }
.dashboard-panel.active { display: block; }

.panel-header { margin-bottom: 2.5rem; }
.panel-header-actions { display: flex; justify-content: space-between; align-items: flex-start; margin-bottom: 2.5rem; gap: 1rem; }
.vault-filters input { background: var(--bg-panel); border: 1px solid var(--border-glass); padding: 0.6rem 1.25rem; border-radius: 8px; color: #fff; width: 280px; transition: var(--transition-smooth); }
.vault-filters input:focus { outline: none; border-color: var(--accent-cyan); }

/* Analytics Grid Element Layouts */
.stats-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 1.5rem; margin-bottom: 2.5rem; }
.stat-card { background: var(--bg-panel); border: 1px solid var(--border-glass); border-radius: 12px; padding: 1.5rem; display: flex; flex-direction: column; gap: 0.5rem; }
.stat-card .label { font-size: 0.8rem; color: var(--text-secondary); text-transform: uppercase; letter-spacing: 0.5px; }
.stat-card .value { font-size: 2rem; font-weight: 700; color: #fff; }

.dashboard-split-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 2rem; }
.content-panel { background: var(--bg-panel); border: 1px solid var(--border-glass); border-radius: 16px; padding: 2rem; }
.panel-form-layout { display: flex; flex-direction: column; height: calc(100% - 2rem); }
.form-actions { display: flex; gap: 1rem; margin-top: auto; padding-top: 1rem; }

/* System Activity Ledger */
.log-output-container { display: flex; flex-direction: column; gap: 0.75rem; max-height: 290px; overflow-y: auto; }
.log-row { background: rgba(7, 10, 19, 0.4); border-left: 2px solid var(--accent-cyan); padding: 0.75rem 1rem; border-radius: 0 6px 6px 0; display: flex; justify-content: space-between; font-size: 0.85rem; }
.log-row .time { color: var(--text-secondary); }

/* Vault Data Grid & Tables */
.vault-records-wrapper { background: var(--bg-panel); border: 1px solid var(--border-glass); border-radius: 12px; overflow: hidden; }
.vault-table { width: 100%; border-collapse: collapse; text-align: left; font-size: 0.95rem; }
.vault-table th { background: rgba(255,255,255,0.02); padding: 1rem 1.5rem; color: var(--text-secondary); font-size: 0.8rem; text-transform: uppercase; font-weight: 600; border-bottom: 1px solid var(--border-glass); }
.vault-table td { padding: 1rem 1.5rem; border-bottom: 1px solid var(--border-glass); color: #fff; vertical-align: middle; }
.vault-table tbody tr:last-child td { border-bottom: none; }
.vault-table tbody tr:hover td { background: rgba(255,255,255,0.01); }

.secret-container { font-family: monospace; background: rgba(0,0,0,0.2); padding: 0.35rem 0.6rem; border-radius: 4px; font-size: 0.9rem; color: var(--accent-cyan); }
.cell-actions { display: flex; gap: 0.5rem; justify-content: flex-end; }
.btn-icon { padding: 0.4rem 0.75rem; font-size: 0.8rem; background: rgba(255,255,255,0.03); border: 1px solid var(--border-glass); color: var(--text-secondary); border-radius: 6px; cursor: pointer; transition: var(--transition-smooth); }
.btn-icon:hover { color: #fff; background: rgba(255,255,255,0.08); border-color: var(--text-secondary); }
.btn-icon.danger:hover { color: var(--text-error); background: rgba(248, 113, 113, 0.1); border-color: rgba(248, 113, 113, 0.2); }

.empty-state { padding: 4rem; text-align: center; color: var(--text-secondary); }

/* Deterministic Entropy Generator Framework */
.generator-module-layout { max-width: 600px; background: var(--bg-panel); border: 1px solid var(--border-glass); padding: 2.5rem; border-radius: 16px; }
.gen-output-container { display: flex; gap: 1rem; margin-bottom: 2rem; background: rgba(0,0,0,0.3); padding: 0.5rem; border-radius: 10px; border: 1px solid var(--border-glass); }
.gen-output-container input { background: transparent; border: none; flex-grow: 1; padding: 0.5rem 1rem; color: #fff; font-family: monospace; font-size: 1.2rem; font-weight: 600; outline: none; width: 50%; }

.gen-controls-grid { display: flex; flex-direction: column; gap: 1.5rem; }
.control-row { display: flex; flex-direction: column; gap: 0.75rem; }
.control-row label { font-size: 0.85rem; color: var(--text-secondary); font-weight: 600; }
.control-row input[type="range"] { -webkit-appearance: none; width: 100%; height: 6px; background: rgba(255,255,255,0.1); border-radius: 4px; outline: none; }
.control-row input[type="range"]::-webkit-slider-thumb { -webkit-appearance: none; width: 18px; height: 18px; background: var(--accent-cyan); border-radius: 50%; cursor: pointer; box-shadow: 0 0 10px rgba(56, 189, 248, 0.5); }

.control-toggle-box { display: flex; flex-direction: column; gap: 0.85rem; background: rgba(7, 10, 19, 0.3); padding: 1.25rem; border-radius: 10px; }
.toggle-container { display: flex; align-items: center; gap: 0.75rem; cursor: pointer; font-size: 0.9rem; color: var(--text-secondary); transition: var(--transition-smooth); }
.toggle-container:hover { color: #fff; }
.toggle-container input { display: none; }
.custom-checkmark { width: 18px; height: 18px; border: 2px solid var(--border-glass); border-radius: 4px; display: inline-block; position: relative; transition: var(--transition-smooth); }
.toggle-container input:checked + .custom-checkmark { background: var(--accent-cyan); border-color: var(--accent-cyan); }
.toggle-container input:checked + .custom-checkmark::after { content: ''; position: absolute; left: 5px; top: 2px; width: 4px; height: 8px; border: solid #000; border-width: 0 2px 2px 0; transform: rotate(45deg); }

/* ==========================================================================
   5. DEEP DIALOG OVERLAYS & LIVE NOTIFICATION SYSTEM
   ========================================================================== */
.modal-overlay { position: fixed; top:0; left:0; width:100%; height:100%; background: rgba(5,7,13,0.85); backdrop-filter: blur(6px); display: none; align-items: center; justify-content: center; z-index: 100; animation: fadeIn 0.2s ease-out; }
.modal-overlay.active { display: flex; }
.modal-card { background: var(--bg-panel); border: 1px solid var(--border-glass); padding: 2.5rem; border-radius: 16px; width: 100%; max-width: 480px; box-shadow: 0 25px 50px -12px rgba(0,0,0,0.5); }
.modal-actions { display: flex; justify-content: flex-end; gap: 1rem; margin-top: 1.5rem; }

/* Toast Notification Layers */
.toast-container { position: fixed; bottom: 2rem; right: 2rem; display: flex; flex-direction: column; gap: 0.75rem; z-index: 1000; }
.toast { background: var(--bg-panel); border: 1px solid var(--border-glass); border-left: 4px solid var(--accent-blue); color: #fff; padding: 1rem 1.5rem; border-radius: 6px; box-shadow: 0 10px 15px -3px rgba(0,0,0,0.3); font-size: 0.9rem; font-weight: 500; min-width: 280px; animation: toastIn 0.25s cubic-bezier(0.175, 0.885, 0.32, 1.275) forwards; }
.toast.success { border-left-color: var(--text-success); }
.toast.error { border-left-color: var(--text-error); }
@keyframes toastIn { from { transform: translateX(100%); opacity: 0; } to { transform: translateX(0); opacity: 1; } }
@keyframes toastOut { to { transform: translateX(100%); opacity: 0; } }

/* ==========================================================================
   6. RESPONSIVE MEDIA QUERIES (ADAPTATION GRID ENGINE)
   ========================================================================== */
@media (max-width: 1024px) {
    .dashboard-split-grid { grid-template-columns: 1fr; }
}

@media (max-width: 768px) {
    .public-header { padding: 1rem 2rem; }
    .hero h1 { font-size: 2.5rem; }
    .dashboard-layout { flex-direction: column; }
    .sidebar { width: 100%; height: auto; border-right: none; border-bottom: 1px solid var(--border-glass); padding: 1.5rem; }
    .sidebar-nav { flex-direction: row; flex-wrap: wrap; margin-bottom: 1rem; }
    .nav-btn { width: auto; padding: 0.5rem 1rem; }
    .nav-btn.active { border-left: none; border-bottom: 3px solid var(--accent-cyan); border-radius: 0; }
    .dashboard-main { padding: 1.5rem; }
    .panel-header-actions { flex-direction: column; align-items: stretch; }
    .vault-filters input { width: 100%; }
    .vault-table th:nth-child(3), .vault-table td:nth-child(3) { display: none; } /* Hide raw codes on mobile views */
}