/* ============================================
   NBM EDU KONCEPT – GLOBAL FOUNDATION
   ============================================ */

/* ── CSS Variables ─────────────────────────── */
:root {
  /* Layout */
  --page-content-width: 1440px;
  --navbar-height: 80px;
  --header-height: 80px;

  /* Brand colours */
  --nbm-indigo:            #202B52;
  --nbm-indigo-dk:         #161e3a;
  --nbm-accent:            #A0C4F7;
  --nbm-white:             #FFFFFF;
  --nbm-bg-alt:            #F5F7FA;
  --nbm-border:            #E0E7ED;
  --nbm-border-lt:         #f0ede9;
  --nbm-text:              #333333;
  --nbm-muted:             #5c5c5c;
  --nbm-shadow:            rgba(32, 43, 82, 0.08);
  --nbm-shadow-md:         rgba(32, 43, 82, 0.13);
  --nbm-shadow-lg:         rgba(32, 43, 82, 0.18);
  --nbm-success:           #16a34a;
  --nbm-danger:            #b91c1c;
  --nbm-warning:           #b45309;
  --nbm-warning-bg:        #fffbeb;
  --nbm-warning-border:    #fde68a;

  /* Legacy aliases (kept for backward compat) */
  --color-background-primary:   #000;
  --color-background-secondary: #fff;
  --color-text-primary:         #fff;
  --color-text-secondary:       #000;
  --hero-height:                100vh;

  /* Spacing */
  --spacing-xs:  0.5rem;
  --spacing-sm:  1rem;
  --spacing-md:  2rem;
  --spacing-lg:  4rem;
  --spacing-xl:  6rem;
}

/* ── Box-model reset ───────────────────────── */
*, *::before, *::after {
  box-sizing: border-box;
}

html {
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
}

body {
  margin: 0;
  padding: 0;
  font-family: 'Montserrat', sans-serif;
}

/* ── Stacking context for header / main / footer */
header, main, footer {
  position: relative;
  isolation: isolate;
}

/* ============================================
   PAGE FLEX LAYOUT
   Ensures footer always sticks to the bottom
   ============================================ */
.page {
  width: 100%;
}

.page-body {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  width: 100%;
}

.main-content {
  flex: 1;
  min-width: 0;
  /* No padding / max-width / margin here —
     each page section handles its own layout. */
}

.footer {
  flex-shrink: 0;
}

/* ── Page overlay (nav mobile + cart drawer) */
.page-overlay {
  position: fixed;
  top: 0;
  right: 0;
  bottom: 0;
  left: 0;
  opacity: 0;
  visibility: hidden;
  background: rgba(0, 0, 0, 0.5);
  transition: opacity 200ms ease;
  will-change: opacity, visibility;
  z-index: 99;
}

/* ============================================
   SHARED CONTAINER
   ============================================ */
.container {
  max-width: var(--page-content-width);
  margin: 0 auto;
  padding: 20px;
}

@media (max-width: 749px) {
  .container {
    padding: 16px;
  }
}

/* ============================================
   SHARED TYPOGRAPHY
   ============================================ */
.section-title {
  text-align: center;
  margin-bottom: 1.5rem;
  color: var(--nbm-indigo);
  font-family: 'Playfair Display', serif;
  font-weight: 600;
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  line-height: 1.3;
}

.divider {
  width: 80px;
  height: 3px;
  background: var(--nbm-indigo);
  margin: 0 auto 3rem;
  border-radius: 2px;
}

/* ============================================
   SHARED BUTTONS
   ============================================ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  box-sizing: border-box;
  padding: 12px 24px;
  border-radius: 10px;
  font-family: 'Montserrat', sans-serif;
  font-size: 1rem;
  font-weight: 500;
  text-decoration: none;
  cursor: pointer;
  border: 2px solid transparent;
  transition: background 0.25s ease, color 0.25s ease,
              border-color 0.25s ease, transform 0.25s ease,
              box-shadow 0.25s ease;
  white-space: nowrap;
  line-height: 1;
}

.btn-primary {
  background: var(--nbm-indigo);
  color: var(--nbm-white);
  border-color: var(--nbm-indigo);
}

.btn-primary:hover {
  background: var(--nbm-accent);
  color: var(--nbm-indigo);
  border-color: var(--nbm-accent);
  transform: translateY(-2px);
  box-shadow: 0 4px 12px var(--nbm-shadow);
}

.btn-secondary {
  background: transparent;
  color: var(--nbm-white);
  border-color: var(--nbm-accent);
}

.btn-secondary:hover {
  background: var(--nbm-accent);
  color: var(--nbm-indigo);
  border-color: var(--nbm-accent);
}

.btn-outline {
  background: transparent;
  color: var(--nbm-indigo);
  border-color: var(--nbm-indigo);
}

.btn-outline:hover {
  background: var(--nbm-indigo);
  color: var(--nbm-white);
  transform: translateY(-2px);
}

.btn-danger {
  background: transparent;
  color: var(--nbm-danger);
  border-color: #fca5a5;
}

.btn-danger:hover {
  background: #fef2f2;
  border-color: var(--nbm-danger);
}

/* ============================================
   SHARED FORM COMPONENTS
   ============================================ */
.form-group {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  margin-bottom: 1rem;
}

.label {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--nbm-indigo);
  letter-spacing: 0.02em;
}

.input {
  padding: 0.7rem 0.9rem;
  border: 1.5px solid var(--nbm-border);
  border-radius: 10px;
  font-size: 0.9375rem;
  font-family: 'Montserrat', sans-serif;
  color: var(--nbm-text);
  background: var(--nbm-white);
  outline: none;
  transition: border-color 0.2s, box-shadow 0.2s;
  width: 100%;
  box-sizing: border-box;
}

.input:focus {
  border-color: var(--nbm-indigo);
  box-shadow: 0 0 0 3px rgba(32, 43, 82, 0.08);
}

.error {
  background: #fff0f0;
  border: 1px solid #fca5a5;
  border-radius: 10px;
  padding: 0.75rem 1rem;
  font-size: 0.875rem;
  color: var(--nbm-danger);
  line-height: 1.5;
}

/* ============================================
   SHARED CARD
   ============================================ */
.card {
  background: var(--nbm-white);
  border: 1px solid var(--nbm-border);
  border-radius: 14px;
  box-shadow: 0 2px 8px var(--nbm-shadow);
}

.card-header {
  padding: 1.25rem 1.5rem;
  border-bottom: 1px solid var(--nbm-border);
}

.card-body {
  padding: 1.5rem;
}

.card-footer {
  padding: 1rem 1.5rem;
  border-top: 1px solid var(--nbm-border);
}

/* ============================================
   LAYOUT UTILITIES
   ============================================ */
.flex {
  display: flex;
}

.grid {
  display: grid;
}

/* ============================================
   ACCESSIBILITY
   ============================================ */
.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* ============================================
   FLASH NOTIFICATIONS
   ============================================ */
.flash {
  position: fixed;
  top: 1.5rem;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
  width: fit-content;
  max-width: min(560px, calc(100vw - 2rem));
  padding: 0.875rem 1rem 0.875rem 1.25rem;
  border-radius: 6px;
  box-shadow: 0 4px 20px var(--nbm-shadow-lg);
  z-index: 1000;
  animation: flash-in 0.25s ease forwards;
}

.flash-message {
  flex: 1;
  font-size: 0.9375rem;
  line-height: 1.45;
  align-self: center;
}

.flash-close {
  flex-shrink: 0;
  background: none;
  border: none;
  cursor: pointer;
  font-size: 1.375rem;
  line-height: 1;
  opacity: 0.55;
  padding: 0;
  margin: 0;
  color: inherit;
  align-self: flex-start;
}

.flash-close:hover {
  opacity: 1;
}

.flash.flash-dismissing {
  animation: flash-out 0.25s ease forwards;
}

.flash-success { background: #d4edda; color: #155724; border: 1px solid #c3e6cb; }
.flash-error   { background: #f8d7da; color: #721c24; border: 1px solid #f5c6cb; }
.flash-info    { background: #d1ecf1; color: #0c5460; border: 1px solid #bee5eb; }

@keyframes flash-in {
  from { opacity: 0; transform: translateX(-50%) translateY(-0.75rem); }
  to   { opacity: 1; transform: translateX(-50%) translateY(0); }
}

@keyframes flash-out {
  from { opacity: 1; transform: translateX(-50%) translateY(0); }
  to   { opacity: 0; transform: translateX(-50%) translateY(-0.75rem); }
}

/* ============================================
   TOAST
   ============================================ */
.toast {
  position: fixed;
  top: calc(var(--navbar-height) + 1rem);
  right: 1.5rem;
  padding: 0.75rem 1.25rem;
  border-radius: 4px;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
  z-index: 500;
  animation: toast-in 0.2s ease;
}

.toast-success { background: #d4edda; color: #155724; border: 1px solid #c3e6cb; }
.toast-error   { background: #f8d7da; color: #721c24; border: 1px solid #f5c6cb; }

@keyframes toast-in {
  from { opacity: 0; transform: translateY(-0.5rem); }
  to   { opacity: 1; transform: translateY(0); }
}