/* ===== VARIABLES ===== */
:root {
  --cyprus: #004643;
  --cyprus-dark: #003330;
  --cyprus-light: #005a56;
  --sand: #f0ede5;
  --sand-dark: #e2ddd3;
  --sand-light: #f8f6f2;
  --white: #ffffff;
  --black: #0a0a0a;
  --text-primary: #1a1a1a;
  --text-secondary: #5a5a5a;
  --text-muted: #8a8a8a;
  --danger: #c0392b;
  --success: #27ae60;
  --warning: #f39c12;
  --border: rgba(0, 70, 67, 0.15);
  --shadow-sm: 0 1px 3px rgba(0, 70, 67, 0.08);
  --shadow-md: 0 4px 16px rgba(0, 70, 67, 0.12);
  --shadow-lg: 0 8px 32px rgba(0, 70, 67, 0.16);
  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --sidebar-width: 260px;
  --header-height: 64px;
  --font: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --transition: 0.2s ease;
}

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
}

body {
  font-family: var(--font);
  background-color: var(--sand);
  color: var(--text-primary);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

a {
  color: inherit;
  text-decoration: none;
}

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

ul {
  list-style: none;
}

/* ===== TYPOGRAPHY ===== */
h1, h2, h3, h4, h5, h6 {
  line-height: 1.2;
  font-weight: 700;
  color: var(--text-primary);
}

/* ===== BUTTONS ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 20px;
  border: none;
  border-radius: var(--radius-sm);
  font-family: var(--font);
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition);
  white-space: nowrap;
}

.btn-primary {
  background: var(--cyprus);
  color: var(--white);
}

.btn-primary:hover {
  background: var(--cyprus-dark);
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

.btn-secondary {
  background: var(--sand-dark);
  color: var(--cyprus);
  border: 1.5px solid var(--border);
}

.btn-secondary:hover {
  background: var(--sand);
  border-color: var(--cyprus);
}

.btn-outline {
  background: transparent;
  color: var(--cyprus);
  border: 1.5px solid var(--cyprus);
}

.btn-outline:hover {
  background: var(--cyprus);
  color: var(--white);
}

.btn-full {
  width: 100%;
}

.btn-lg {
  padding: 14px 28px;
  font-size: 1rem;
}

.btn-sm {
  padding: 6px 14px;
  font-size: 0.8rem;
}

/* ===== FORM ELEMENTS ===== */
.form-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
  margin-bottom: 18px;
}

.form-label {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-secondary);
  letter-spacing: 0.02em;
}

.form-input {
  padding: 11px 14px;
  border: 1.5px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--white);
  font-family: var(--font);
  font-size: 0.95rem;
  color: var(--text-primary);
  transition: border-color var(--transition), box-shadow var(--transition);
  outline: none;
}

.form-input:focus {
  border-color: var(--cyprus);
  box-shadow: 0 0 0 3px rgba(0, 70, 67, 0.1);
}

.form-input::placeholder {
  color: var(--text-muted);
}

/* ===== FLASH MESSAGES ===== */
.flash-messages {
  position: fixed;
  top: 20px;
  right: 20px;
  z-index: 9999;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.flash {
  padding: 12px 18px;
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  font-weight: 500;
  box-shadow: var(--shadow-md);
  animation: slideIn 0.3s ease;
}

.flash-error {
  background: #fdf0ef;
  color: var(--danger);
  border-left: 3px solid var(--danger);
}

.flash-success {
  background: #edfaf3;
  color: var(--success);
  border-left: 3px solid var(--success);
}

@keyframes slideIn {
  from { opacity: 0; transform: translateX(20px); }
  to   { opacity: 1; transform: translateX(0); }
}

/* ===== LAYOUT ===== */
.app-layout {
  display: flex;
  min-height: 100vh;
}

/* ===== SIDEBAR ===== */
.sidebar {
  width: var(--sidebar-width);
  background: var(--cyprus);
  color: var(--white);
  display: flex;
  flex-direction: column;
  position: fixed;
  top: 0;
  left: 0;
  height: 100vh;
  z-index: 100;
  transition: transform var(--transition);
}

.sidebar-logo {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 24px 20px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.sidebar-logo img {
  width: 38px;
  height: 38px;
  border-radius: var(--radius-sm);
  object-fit: contain;
}

.sidebar-logo-text {
  font-size: 1.3rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  color: var(--sand);
}

.sidebar-logo-text span {
  color: rgba(240, 237, 229, 0.6);
  font-weight: 400;
  font-size: 0.75rem;
  display: block;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  margin-top: -2px;
}

.sidebar-nav {
  flex: 1;
  padding: 20px 12px;
  overflow-y: auto;
}

.sidebar-section-label {
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: rgba(240, 237, 229, 0.4);
  padding: 0 8px;
  margin: 18px 0 8px;
}

.nav-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 12px;
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  font-weight: 500;
  color: rgba(240, 237, 229, 0.75);
  transition: all var(--transition);
  cursor: pointer;
  margin-bottom: 2px;
}

.nav-item:hover {
  background: rgba(240, 237, 229, 0.08);
  color: var(--sand);
}

.nav-item.active {
  background: rgba(240, 237, 229, 0.15);
  color: var(--sand);
  font-weight: 600;
}

.nav-item svg {
  width: 18px;
  height: 18px;
  flex-shrink: 0;
  opacity: 0.8;
}

.nav-item.active svg,
.nav-item:hover svg {
  opacity: 1;
}

.sidebar-footer {
  padding: 16px 12px;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.sidebar-user {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 12px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: background var(--transition);
}

.sidebar-user:hover {
  background: rgba(240, 237, 229, 0.08);
}

.sidebar-avatar {
  width: 34px;
  height: 34px;
  border-radius: 50%;
  background: rgba(240, 237, 229, 0.2);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--sand);
  flex-shrink: 0;
}

.sidebar-user-info {
  flex: 1;
  min-width: 0;
}

.sidebar-user-name {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--sand);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.sidebar-user-role {
  font-size: 0.72rem;
  color: rgba(240, 237, 229, 0.5);
}

/* ===== HEADER ===== */
.main-content {
  flex: 1;
  margin-left: var(--sidebar-width);
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

.header {
  height: var(--header-height);
  background: var(--sand-light);
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 28px;
  position: sticky;
  top: 0;
  z-index: 50;
  backdrop-filter: blur(8px);
}

.header-left {
  display: flex;
  align-items: center;
  gap: 16px;
}

.header-title {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--cyprus);
}

.header-breadcrumb {
  font-size: 0.82rem;
  color: var(--text-muted);
}

.header-right {
  display: flex;
  align-items: center;
  gap: 12px;
}

.header-icon-btn {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-sm);
  background: transparent;
  border: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-secondary);
  transition: all var(--transition);
}

.header-icon-btn:hover {
  background: var(--sand-dark);
  color: var(--cyprus);
}

.header-icon-btn svg {
  width: 18px;
  height: 18px;
}

.header-avatar {
  width: 34px;
  height: 34px;
  border-radius: 50%;
  background: var(--cyprus);
  color: var(--sand);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.8rem;
  font-weight: 700;
  cursor: pointer;
}

/* ===== PAGE CONTENT ===== */
.page-content {
  flex: 1;
  padding: 28px;
}

/* ===== CARDS ===== */
.card {
  background: var(--white);
  border-radius: var(--radius-md);
  border: 1px solid var(--border);
  padding: 24px;
  box-shadow: var(--shadow-sm);
}

.card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 20px;
}

.card-title {
  font-size: 1rem;
  font-weight: 700;
  color: var(--text-primary);
}

/* ===== STAT CARDS ===== */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 18px;
  margin-bottom: 28px;
}

.stat-card {
  background: var(--white);
  border-radius: var(--radius-md);
  border: 1px solid var(--border);
  padding: 22px;
  box-shadow: var(--shadow-sm);
  transition: box-shadow var(--transition);
}

.stat-card:hover {
  box-shadow: var(--shadow-md);
}

.stat-card-icon {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-sm);
  background: rgba(0, 70, 67, 0.08);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 14px;
}

.stat-card-icon svg {
  width: 20px;
  height: 20px;
  color: var(--cyprus);
}

.stat-card-value {
  font-size: 1.75rem;
  font-weight: 800;
  color: var(--cyprus);
  letter-spacing: -0.03em;
  line-height: 1;
  margin-bottom: 4px;
}

.stat-card-label {
  font-size: 0.82rem;
  color: var(--text-muted);
  font-weight: 500;
}

/* ===== RESPONSIVE ===== */
@media (max-width: 900px) {
  .sidebar {
    transform: translateX(-100%);
  }

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

  .main-content {
    margin-left: 0;
  }
}

@media (max-width: 480px) {
  .page-content {
    padding: 18px;
  }
}