/* ============================================
   HotelPro - Design System
   Premium Dark Theme with Gold Accents
   ============================================ */

/* CSS Custom Properties */
:root {
    /* Background Colors */
    --bg-primary: #0b0b14;
    --bg-secondary: #12121f;
    --bg-surface: #1a1a2e;
    --bg-surface-hover: #222238;
    --bg-surface-active: #2a2a42;
    --bg-elevated: #252540;
    --bg-input: #16162a;

    /* Accent Colors - Gold */
    --accent: #d4a574;
    --accent-light: #e8c07a;
    --accent-dark: #b8895a;
    --accent-rgb: 212, 165, 116;
    --accent-gradient: linear-gradient(135deg, #d4a574 0%, #e8c07a 50%, #d4a574 100%);
    --accent-gradient-hover: linear-gradient(135deg, #e8c07a 0%, #f0d090 50%, #e8c07a 100%);
    --accent-glow: 0 0 20px rgba(212, 165, 116, 0.3);

    /* Text Colors */
    --text-primary: #f0f0f5;
    --text-secondary: #a0a0b8;
    --text-muted: #6a6a82;
    --text-on-accent: #1a1a2e;

    /* Border Colors */
    --border: #2a2a42;
    --border-light: #353555;
    --border-focus: var(--accent);

    /* Status Colors */
    --success: #4ade80;
    --success-bg: rgba(74, 222, 128, 0.1);
    --warning: #fbbf24;
    --warning-bg: rgba(251, 191, 36, 0.1);
    --danger: #f87171;
    --danger-bg: rgba(248, 113, 113, 0.1);
    --info: #60a5fa;
    --info-bg: rgba(96, 165, 250, 0.1);

    /* Room Status Colors */
    --status-free: #4ade80;
    --status-free-bg: rgba(74, 222, 128, 0.15);
    --status-pre-reserved: #60a5fa;
    --status-pre-reserved-bg: rgba(96, 165, 250, 0.15);
    --status-reserved: #fbbf24;
    --status-reserved-bg: rgba(251, 191, 36, 0.15);
    --status-occupied: #f87171;
    --status-occupied-bg: rgba(248, 113, 113, 0.15);
    --status-cleaning: #fb923c;
    --status-cleaning-bg: rgba(251, 146, 60, 0.15);
    --status-maintenance: #9ca3af;
    --status-maintenance-bg: rgba(156, 163, 175, 0.15);

    /* Spacing */
    --space-xs: 4px;
    --space-sm: 8px;
    --space-md: 16px;
    --space-lg: 24px;
    --space-xl: 32px;
    --space-2xl: 48px;
    --space-3xl: 64px;

    /* Border Radius */
    --radius-xs: 4px;
    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    --radius-full: 999px;

    /* Shadows */
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.5);
    --shadow-xl: 0 16px 48px rgba(0, 0, 0, 0.6);
    --shadow-glow: 0 0 30px rgba(212, 165, 116, 0.15);

    /* Typography */
    --font-body: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-display: 'Outfit', 'Inter', sans-serif;
    --font-mono: 'JetBrains Mono', 'Fira Code', monospace;

    --text-xs: 0.75rem;
    --text-sm: 0.8125rem;
    --text-base: 0.9375rem;
    --text-lg: 1.125rem;
    --text-xl: 1.25rem;
    --text-2xl: 1.5rem;
    --text-3xl: 2rem;
    --text-4xl: 2.5rem;

    /* Line Heights */
    --leading-tight: 1.25;
    --leading-normal: 1.5;
    --leading-relaxed: 1.75;

    /* Transitions */
    --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition: 300ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 500ms cubic-bezier(0.4, 0, 0.2, 1);

    /* Z-Index Scale */
    --z-dropdown: 100;
    --z-sticky: 200;
    --z-modal-backdrop: 300;
    --z-modal: 400;
    --z-toast: 500;
    --z-tooltip: 600;

    /* Layout */
    --sidebar-width: 260px;
    --sidebar-collapsed: 72px;
    --header-height: 64px;
}

/* ============================================
   Reset & Base
   ============================================ */

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

html {
    font-size: 16px;
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font-body);
    font-size: var(--text-base);
    line-height: var(--leading-normal);
    color: var(--text-primary);
    background-color: var(--bg-primary);
    overflow-x: hidden;
    min-height: 100vh;
}

a {
    color: var(--accent);
    text-decoration: none;
    transition: color var(--transition-fast);
}

a:hover {
    color: var(--accent-light);
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

button {
    font-family: inherit;
    cursor: pointer;
    border: none;
    background: none;
    color: inherit;
    font-size: inherit;
}

input, select, textarea {
    font-family: inherit;
    font-size: inherit;
    color: inherit;
}

h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-display);
    font-weight: 600;
    line-height: var(--leading-tight);
    color: var(--text-primary);
}

h1 { font-size: var(--text-3xl); font-weight: 700; }
h2 { font-size: var(--text-2xl); }
h3 { font-size: var(--text-xl); }
h4 { font-size: var(--text-lg); }

::selection {
    background: rgba(212, 165, 116, 0.3);
    color: var(--text-primary);
}

::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

::-webkit-scrollbar-track {
    background: var(--bg-primary);
}

::-webkit-scrollbar-thumb {
    background: var(--border-light);
    border-radius: var(--radius-full);
}

::-webkit-scrollbar-thumb:hover {
    background: var(--text-muted);
}

/* ============================================
   Utility Classes
   ============================================ */

.hidden { display: none !important; }
.sr-only {
    position: absolute; width: 1px; height: 1px;
    padding: 0; margin: -1px; overflow: hidden;
    clip: rect(0,0,0,0); border: 0;
}
.text-center { text-align: center; }
.text-right { text-align: right; }
.text-muted { color: var(--text-muted); }
.text-secondary { color: var(--text-secondary); }
.text-accent { color: var(--accent); }
.text-success { color: var(--success); }
.text-warning { color: var(--warning); }
.text-danger { color: var(--danger); }
.text-sm { font-size: var(--text-sm); }
.text-xs { font-size: var(--text-xs); }
.text-lg { font-size: var(--text-lg); }
.font-bold { font-weight: 700; }
.font-semibold { font-weight: 600; }
.font-medium { font-weight: 500; }

.flex { display: flex; }
.flex-col { flex-direction: column; }
.items-center { align-items: center; }
.items-start { align-items: flex-start; }
.items-end { align-items: flex-end; }
.justify-center { justify-content: center; }
.justify-between { justify-content: space-between; }
.justify-end { justify-content: flex-end; }
.flex-wrap { flex-wrap: wrap; }
.flex-1 { flex: 1; }
.gap-xs { gap: var(--space-xs); }
.gap-sm { gap: var(--space-sm); }
.gap-md { gap: var(--space-md); }
.gap-lg { gap: var(--space-lg); }
.gap-xl { gap: var(--space-xl); }

.grid { display: grid; }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }
.grid-auto { grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); }

.mt-sm { margin-top: var(--space-sm); }
.mt-md { margin-top: var(--space-md); }
.mt-lg { margin-top: var(--space-lg); }
.mt-xl { margin-top: var(--space-xl); }
.mb-sm { margin-bottom: var(--space-sm); }
.mb-md { margin-bottom: var(--space-md); }
.mb-lg { margin-bottom: var(--space-lg); }
.mb-xl { margin-bottom: var(--space-xl); }
.ml-auto { margin-left: auto; }

.p-sm { padding: var(--space-sm); }
.p-md { padding: var(--space-md); }
.p-lg { padding: var(--space-lg); }
.p-xl { padding: var(--space-xl); }

.w-full { width: 100%; }
.overflow-auto { overflow: auto; }

/* ============================================
   Login Screen
   ============================================ */

.login-screen {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-primary);
    position: relative;
    overflow: hidden;
}

.login-bg-animation {
    position: absolute;
    inset: 0;
    overflow: hidden;
    pointer-events: none;
}

.login-orb {
    position: absolute;
    border-radius: 50%;
    filter: blur(80px);
    opacity: 0.4;
    animation: orbFloat 20s infinite ease-in-out;
}

.login-orb-1 {
    width: 400px;
    height: 400px;
    background: radial-gradient(circle, rgba(212, 165, 116, 0.3), transparent);
    top: -100px;
    right: -100px;
    animation-delay: 0s;
}

.login-orb-2 {
    width: 300px;
    height: 300px;
    background: radial-gradient(circle, rgba(96, 165, 250, 0.2), transparent);
    bottom: -80px;
    left: -80px;
    animation-delay: -7s;
}

.login-orb-3 {
    width: 250px;
    height: 250px;
    background: radial-gradient(circle, rgba(232, 192, 122, 0.2), transparent);
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    animation-delay: -14s;
}

@keyframes orbFloat {
    0%, 100% { transform: translate(0, 0) scale(1); }
    25% { transform: translate(40px, -30px) scale(1.1); }
    50% { transform: translate(-20px, 20px) scale(0.95); }
    75% { transform: translate(30px, 40px) scale(1.05); }
}

.login-container {
    position: relative;
    z-index: 1;
    width: 100%;
    max-width: 440px;
    padding: var(--space-xl);
}

.login-card {
    background: rgba(26, 26, 46, 0.8);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid var(--border);
    border-radius: var(--radius-xl);
    padding: var(--space-2xl);
    box-shadow: var(--shadow-xl), var(--shadow-glow);
    animation: loginSlideUp 0.6s ease-out;
}

@keyframes loginSlideUp {
    from { opacity: 0; transform: translateY(30px); }
    to { opacity: 1; transform: translateY(0); }
}

.login-logo {
    text-align: center;
    margin-bottom: var(--space-xl);
}

.login-logo .logo-icon-large {
    width: 64px;
    height: 64px;
    margin: 0 auto var(--space-md);
    background: var(--accent-gradient);
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--bg-primary);
    box-shadow: var(--accent-glow);
}

.login-logo h1 {
    font-family: var(--font-display);
    font-size: var(--text-3xl);
    font-weight: 800;
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: var(--space-xs);
}

.login-logo p {
    color: var(--text-secondary);
    font-size: var(--text-sm);
}

.login-form {
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
}

.login-form .form-group {
    margin-bottom: 0;
}

.login-error {
    background: var(--danger-bg);
    border: 1px solid rgba(248, 113, 113, 0.3);
    border-radius: var(--radius-md);
    padding: var(--space-sm) var(--space-md);
    color: var(--danger);
    font-size: var(--text-sm);
    display: none;
    animation: shake 0.3s ease;
}

.login-error.show {
    display: block;
}

@keyframes shake {
    0%, 100% { transform: translateX(0); }
    25% { transform: translateX(-5px); }
    75% { transform: translateX(5px); }
}

/* ============================================
   App Shell Layout
   ============================================ */

.app-shell {
    display: flex;
    min-height: 100vh;
}

/* ============================================
   Sidebar
   ============================================ */

.sidebar {
    width: var(--sidebar-width);
    height: 100vh;
    position: fixed;
    top: 0;
    left: 0;
    z-index: var(--z-sticky);
    background: var(--bg-secondary);
    border-right: 1px solid var(--border);
    display: flex;
    flex-direction: column;
    transition: width var(--transition), transform var(--transition);
    overflow: hidden;
}

.sidebar.collapsed {
    width: var(--sidebar-collapsed);
}

.sidebar-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--space-md) var(--space-md);
    border-bottom: 1px solid var(--border);
    min-height: 65px;
}

.sidebar-logo {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    overflow: hidden;
}

.logo-icon {
    flex-shrink: 0;
    width: 40px;
    height: 40px;
    background: var(--accent-gradient);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--bg-primary);
    box-shadow: var(--accent-glow);
}

.logo-text {
    display: flex;
    flex-direction: column;
    white-space: nowrap;
    overflow: hidden;
}

.sidebar.collapsed .logo-text {
    display: none;
}

.logo-name {
    font-family: var(--font-display);
    font-size: var(--text-lg);
    font-weight: 700;
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.logo-tagline {
    font-size: var(--text-xs);
    color: var(--text-muted);
    margin-top: -2px;
}

.sidebar-toggle {
    flex-shrink: 0;
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-sm);
    color: var(--text-secondary);
    transition: all var(--transition-fast);
}

.sidebar-toggle:hover {
    background: var(--bg-surface-hover);
    color: var(--text-primary);
}

.sidebar.collapsed .sidebar-toggle svg {
    transform: rotate(180deg);
}

/* Sidebar Navigation */
.sidebar-nav {
    flex: 1;
    overflow-y: auto;
    overflow-x: hidden;
    padding: var(--space-sm) 0;
}

.nav-section-title {
    display: block;
    padding: var(--space-md) var(--space-md) var(--space-xs) var(--space-lg);
    font-size: var(--text-xs);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--text-muted);
    white-space: nowrap;
}

.sidebar.collapsed .nav-section-title {
    visibility: hidden;
    height: 0;
    padding: 0;
    margin: 0;
}

.nav-item {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-sm) var(--space-md) var(--space-sm) var(--space-lg);
    margin: 2px var(--space-sm);
    border-radius: var(--radius-md);
    color: var(--text-secondary);
    font-size: var(--text-sm);
    font-weight: 500;
    transition: all var(--transition-fast);
    white-space: nowrap;
    text-decoration: none;
    position: relative;
}

.nav-item:hover {
    background: var(--bg-surface-hover);
    color: var(--text-primary);
}

.nav-item.active {
    background: rgba(212, 165, 116, 0.1);
    color: var(--accent);
}

.nav-item.active::before {
    content: '';
    position: absolute;
    left: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 3px;
    height: 60%;
    background: var(--accent-gradient);
    border-radius: 0 var(--radius-full) var(--radius-full) 0;
}

.nav-icon {
    width: 20px;
    height: 20px;
    flex-shrink: 0;
    stroke-width: 1.75;
}

.sidebar.collapsed .nav-item {
    padding: var(--space-sm);
    justify-content: center;
    margin: 2px var(--space-xs);
}

.sidebar.collapsed .nav-item span {
    display: none;
}

/* Sidebar Footer */
.sidebar-footer {
    border-top: 1px solid var(--border);
    padding: var(--space-md);
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-sm);
}

.user-info {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    overflow: hidden;
    flex: 1;
    min-width: 0;
}

.user-avatar {
    width: 36px;
    height: 36px;
    flex-shrink: 0;
    border-radius: var(--radius-full);
    background: var(--accent-gradient);
    color: var(--bg-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: var(--text-sm);
}

.user-details {
    display: flex;
    flex-direction: column;
    overflow: hidden;
    white-space: nowrap;
}

.sidebar.collapsed .user-details {
    display: none;
}

.user-name {
    font-size: var(--text-sm);
    font-weight: 600;
    color: var(--text-primary);
    text-overflow: ellipsis;
    overflow: hidden;
}

.user-role {
    font-size: var(--text-xs);
    color: var(--text-muted);
}

.btn-logout {
    width: 36px;
    height: 36px;
    flex-shrink: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-sm);
    color: var(--text-muted);
    transition: all var(--transition-fast);
}

.btn-logout:hover {
    background: var(--danger-bg);
    color: var(--danger);
}

.sidebar.collapsed .btn-logout {
    display: none;
}

/* ============================================
   Main Content Area
   ============================================ */

.main-wrapper {
    flex: 1;
    margin-left: var(--sidebar-width);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    transition: margin-left var(--transition);
}

.sidebar.collapsed ~ .main-wrapper {
    margin-left: var(--sidebar-collapsed);
}

.top-header {
    height: var(--header-height);
    background: rgba(18, 18, 31, 0.8);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 var(--space-lg);
    position: sticky;
    top: 0;
    z-index: var(--z-sticky);
}

.header-left {
    display: flex;
    align-items: center;
    gap: var(--space-md);
}

.mobile-menu-btn {
    display: none;
    width: 40px;
    height: 40px;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-md);
    color: var(--text-secondary);
}

.breadcrumb {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    font-size: var(--text-sm);
    color: var(--text-secondary);
}

.breadcrumb-item {
    font-weight: 500;
}

.breadcrumb-separator {
    color: var(--text-muted);
}

.breadcrumb-item:last-child {
    color: var(--text-primary);
}

.header-right {
    display: flex;
    align-items: center;
    gap: var(--space-lg);
}

.header-date {
    font-size: var(--text-sm);
    color: var(--text-secondary);
}

.notification-btn {
    position: relative;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-md);
    color: var(--text-secondary);
    transition: all var(--transition-fast);
}

.notification-btn:hover {
    background: var(--bg-surface-hover);
    color: var(--text-primary);
}

.notification-badge {
    position: absolute;
    top: 6px;
    right: 6px;
    min-width: 18px;
    height: 18px;
    background: var(--danger);
    color: white;
    font-size: 11px;
    font-weight: 700;
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 0 4px;
}

.main-content {
    flex: 1;
    padding: var(--space-lg);
    animation: fadeIn 0.3s ease;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(8px); }
    to { opacity: 1; transform: translateY(0); }
}

/* Loading Screen */
.loading-screen {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-height: 400px;
    gap: var(--space-md);
    color: var(--text-muted);
}

.loader {
    width: 40px;
    height: 40px;
    border: 3px solid var(--border);
    border-top-color: var(--accent);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

/* ============================================
   Responsive
   ============================================ */

@media (max-width: 1024px) {
    .sidebar {
        transform: translateX(-100%);
        z-index: var(--z-modal);
    }

    .sidebar.mobile-open {
        transform: translateX(0);
    }

    .main-wrapper {
        margin-left: 0 !important;
    }

    .mobile-menu-btn {
        display: flex;
    }

    .sidebar-backdrop {
        position: fixed;
        inset: 0;
        background: rgba(0, 0, 0, 0.5);
        z-index: calc(var(--z-modal) - 1);
        animation: backdropFadeIn var(--transition-fast) ease-out;
    }

    @keyframes backdropFadeIn {
        from { opacity: 0; }
        to { opacity: 1; }
    }
}

@media (max-width: 768px) {
    :root {
        --text-base: 0.875rem;
        --text-3xl: 1.75rem;
        --space-lg: 16px;
        --space-xl: 24px;
    }

    .main-content {
        padding: var(--space-md);
    }

    .grid-2, .grid-3, .grid-4 {
        grid-template-columns: 1fr;
    }

    .top-header {
        padding: 0 var(--space-md);
    }
}

@media (max-width: 480px) {
    .login-container {
        padding: var(--space-md);
    }

    .login-card {
        padding: var(--space-lg);
    }
}