/* ============================================================
   Tekpair – Main Stylesheet
   Mobile-first, Inter font, CSS custom properties
   ============================================================ */

/* ── Google Fonts ─────────────────────────────────────────── */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800&display=swap');

/* ── CSS Variables ──────────────────────────────────────────  */
:root {
  /* Brand colours - Updated to Tekpair Trust Blue */
  --color-primary:        #0050CD;
  --color-primary-dark:   #003E99;
  --color-primary-light:  #DCE6FF;
  --color-primary-50:     #F0F5FF;

  --color-success:        #16A34A;
  --color-success-light:  #DCFCE7;
  --color-warning:        #D97706;
  --color-warning-light:  #FEF3C7;
  --color-danger:         #DC2626;
  --color-danger-light:   #FEE2E2;
  --color-info:           #0891B2;
  --color-info-light:     #CFFAFE;

  /* Neutrals */
  --color-bg:             #F8FAFC;
  --color-surface:        #FFFFFF;
  --color-border:         #E2E8F0;
  --color-border-dark:    #CBD5E1;

  --color-text:           #0F172A;
  --color-text-secondary: #475569;
  --color-text-muted:     #94A3B8;
  --color-text-disabled:  #CBD5E1;

  /* Status colours */
  --color-requested:      #D97706;
  --color-confirmed:      #2563EB;
  --color-in-progress:    #9333EA;
  --color-completed:      #16A34A;
  --color-cancelled:      #64748B;
  --color-rejected:       #DC2626;

  /* Typography */
  --font-family:          'Inter', system-ui, -apple-system, sans-serif;
  --font-size-xs:         0.75rem;    /* 12px */
  --font-size-sm:         0.875rem;   /* 14px */
  --font-size-base:       1rem;       /* 16px */
  --font-size-lg:         1.125rem;   /* 18px */
  --font-size-xl:         1.25rem;    /* 20px */
  --font-size-2xl:        1.5rem;     /* 24px */
  --font-size-3xl:        1.875rem;   /* 30px */
  --font-size-4xl:        2.25rem;    /* 36px */

  --font-weight-light:    300;
  --font-weight-regular:  400;
  --font-weight-medium:   500;
  --font-weight-semibold: 600;
  --font-weight-bold:     700;
  --font-weight-extrabold: 800;

  --line-height-tight:    1.25;
  --line-height-snug:     1.375;
  --line-height-normal:   1.5;
  --line-height-relaxed:  1.625;

  /* Spacing */
  --spacing-1:  0.25rem;
  --spacing-2:  0.5rem;
  --spacing-3:  0.75rem;
  --spacing-4:  1rem;
  --spacing-5:  1.25rem;
  --spacing-6:  1.5rem;
  --spacing-8:  2rem;
  --spacing-10: 2.5rem;
  --spacing-12: 3rem;
  --spacing-16: 4rem;
  --spacing-20: 5rem;

  /* Border radius */
  --radius-sm:  0.25rem;
  --radius-md:  0.5rem;
  --radius-lg:  0.75rem;
  --radius-xl:  1rem;
  --radius-2xl: 1.5rem;
  --radius-full: 9999px;

  /* Shadows */
  --shadow-sm:  0 1px 2px 0 rgb(0 0 0 / 0.05);
  --shadow-md:  0 4px 6px -1px rgb(0 0 0 / 0.07), 0 2px 4px -2px rgb(0 0 0 / 0.05);
  --shadow-lg:  0 10px 15px -3px rgb(0 0 0 / 0.08), 0 4px 6px -4px rgb(0 0 0 / 0.05);
  --shadow-xl:  0 20px 25px -5px rgb(0 0 0 / 0.10), 0 8px 10px -6px rgb(0 0 0 / 0.05);

  /* Transitions */
  --transition-fast:   150ms ease;
  --transition-base:   250ms ease;
  --transition-slow:   350ms ease;

  /* Layout */
  --container-max:     1200px;
  --nav-height:        64px;
}

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

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

body {
  font-family: var(--font-family);
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-regular);
  line-height: var(--line-height-normal);
  color: var(--color-text);
  background-color: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  min-height: 100vh;
}

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

a {
  color: var(--color-primary);
  text-decoration: none;
  transition: color var(--transition-fast);
}
a:hover { color: var(--color-primary-dark); }

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

ul, ol { list-style: none; }

table {
  border-collapse: collapse;
  width: 100%;
}

/* ── Typography scale ───────────────────────────────────────  */
h1, h2, h3, h4, h5, h6 {
  line-height: var(--line-height-tight);
  font-weight: var(--font-weight-bold);
  color: var(--color-text);
}

h1 { font-size: var(--font-size-3xl); }
h2 { font-size: var(--font-size-2xl); }
h3 { font-size: var(--font-size-xl); }
h4 { font-size: var(--font-size-lg); }
h5 { font-size: var(--font-size-base); }
h6 { font-size: var(--font-size-sm); }

p { margin-bottom: var(--spacing-4); }
p:last-child { margin-bottom: 0; }

small { font-size: var(--font-size-sm); }

strong { font-weight: var(--font-weight-semibold); }

.text-xs      { font-size: var(--font-size-xs); }
.text-sm      { font-size: var(--font-size-sm); }
.text-base    { font-size: var(--font-size-base); }
.text-lg      { font-size: var(--font-size-lg); }
.text-xl      { font-size: var(--font-size-xl); }
.text-2xl     { font-size: var(--font-size-2xl); }
.text-3xl     { font-size: var(--font-size-3xl); }

.font-light    { font-weight: var(--font-weight-light); }
.font-regular  { font-weight: var(--font-weight-regular); }
.font-medium   { font-weight: var(--font-weight-medium); }
.font-semibold { font-weight: var(--font-weight-semibold); }
.font-bold     { font-weight: var(--font-weight-bold); }

.text-primary   { color: var(--color-primary); }
.text-secondary { color: var(--color-text-secondary); }
.text-muted     { color: var(--color-text-muted); }
.text-success   { color: var(--color-success); }
.text-warning   { color: var(--color-warning); }
.text-danger    { color: var(--color-danger); }
.text-center    { text-align: center; }
.text-right     { text-align: right; }
.text-left      { text-align: left; }

/* ── Layout utilities ───────────────────────────────────────  */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: var(--spacing-4);
}

@media (min-width: 640px) {
  .container { padding-inline: var(--spacing-6); }
}
@media (min-width: 1024px) {
  .container { padding-inline: var(--spacing-8); }
}

/* Flex */
.flex          { display: flex; }
.flex-col      { flex-direction: column; }
.flex-wrap     { flex-wrap: wrap; }
.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; }
.gap-1  { gap: var(--spacing-1); }
.gap-2  { gap: var(--spacing-2); }
.gap-3  { gap: var(--spacing-3); }
.gap-4  { gap: var(--spacing-4); }
.gap-6  { gap: var(--spacing-6); }
.gap-8  { gap: var(--spacing-8); }
.flex-1 { flex: 1; }

/* Grids */
.grid   { display: grid; }

.grid-2 {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--spacing-4);
}
@media (min-width: 640px) {
  .grid-2 { grid-template-columns: repeat(2, 1fr); }
}

.grid-3 {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--spacing-4);
}
@media (min-width: 640px) {
  .grid-3 { grid-template-columns: repeat(2, 1fr); }
}
@media (min-width: 1024px) {
  .grid-3 { grid-template-columns: repeat(3, 1fr); }
}

.grid-4 {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--spacing-4);
}
@media (min-width: 480px) {
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
}
@media (min-width: 768px) {
  .grid-4 { grid-template-columns: repeat(3, 1fr); }
}
@media (min-width: 1024px) {
  .grid-4 { grid-template-columns: repeat(4, 1fr); }
}

/* ── Spacing helpers ────────────────────────────────────────  */
.mt-1  { margin-top: var(--spacing-1); }
.mt-2  { margin-top: var(--spacing-2); }
.mt-3  { margin-top: var(--spacing-3); }
.mt-4  { margin-top: var(--spacing-4); }
.mt-6  { margin-top: var(--spacing-6); }
.mt-8  { margin-top: var(--spacing-8); }
.mb-1  { margin-bottom: var(--spacing-1); }
.mb-2  { margin-bottom: var(--spacing-2); }
.mb-4  { margin-bottom: var(--spacing-4); }
.mb-6  { margin-bottom: var(--spacing-6); }
.mb-8  { margin-bottom: var(--spacing-8); }
.ml-2  { margin-left: var(--spacing-2); }
.mr-2  { margin-right: var(--spacing-2); }
.mx-auto { margin-inline: auto; }

.p-4   { padding: var(--spacing-4); }
.p-6   { padding: var(--spacing-6); }
.px-4  { padding-inline: var(--spacing-4); }
.py-2  { padding-block: var(--spacing-2); }
.py-4  { padding-block: var(--spacing-4); }
.py-8  { padding-block: var(--spacing-8); }
.py-16 { padding-block: var(--spacing-16); }

/* ── Display helpers ────────────────────────────────────────  */
.hidden       { display: none !important; }
.block        { display: block; }
.inline-flex  { display: inline-flex; }
.w-full       { width: 100%; }
.h-full       { height: 100%; }
.relative     { position: relative; }
.absolute     { position: absolute; }
.overflow-hidden { overflow: hidden; }
.rounded      { border-radius: var(--radius-md); }
.rounded-lg   { border-radius: var(--radius-lg); }
.rounded-full { border-radius: var(--radius-full); }

.shadow-sm  { box-shadow: var(--shadow-sm); }
.shadow-md  { box-shadow: var(--shadow-md); }
.shadow-lg  { box-shadow: var(--shadow-lg); }

/* Divider */
.divider {
  height: 1px;
  background-color: var(--color-border);
  border: none;
  margin-block: var(--spacing-4);
}

/* ── Page section spacing ───────────────────────────────────  */
.section {
  padding-block: var(--spacing-12);
}
@media (max-width: 640px) {
  .section { padding-block: var(--spacing-8); }
}

/* ── Responsive visibility ──────────────────────────────────  */
@media (max-width: 639px) {
  .hide-mobile { display: none !important; }
}
@media (min-width: 640px) {
  .hide-desktop { display: none !important; }
}

/* ── Scrollbar styling ──────────────────────────────────────  */
::-webkit-scrollbar           { width: 6px; height: 6px; }
::-webkit-scrollbar-track     { background: var(--color-bg); }
::-webkit-scrollbar-thumb     { background: var(--color-border-dark); border-radius: var(--radius-full); }
::-webkit-scrollbar-thumb:hover { background: var(--color-text-muted); }

/* ── Focus ring ─────────────────────────────────────────────  */
:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

/* ── Page loader overlay ────────────────────────────────────  */
.page-loader {
  position: fixed;
  inset: 0;
  background: var(--color-surface);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-4);
  z-index: 9999;
  transition: opacity var(--transition-slow);
}
.page-loader.loaded {
  opacity: 0;
  pointer-events: none;
}
.spinner {
  width: 48px;
  height: 48px;
  border: 4px solid var(--color-border);
  border-top-color: var(--color-primary);
  border-right-color: var(--color-primary);
  border-radius: 50%;
  animation: spin 0.7s cubic-bezier(0.68, -0.55, 0.265, 1.55) infinite;
  box-shadow: 0 4px 12px rgba(99, 102, 241, 0.15);
}
@keyframes spin {
  to { transform: rotate(360deg); }
}

/* Loading text (optional) */
.page-loader::after {
  content: 'Loading...';
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  color: var(--color-text-muted);
  animation: pulse-text 1.5s ease-in-out infinite;
}
@keyframes pulse-text {
  0%, 100% { opacity: 0.5; }
  50% { opacity: 1; }
}

/* ── Card fade-in (add class to list items on render) ───────  */
@keyframes card-fade-in {
  from { opacity: 0; transform: translateY(14px); }
  to   { opacity: 1; transform: none; }
}
.card-fade-in {
  animation: card-fade-in 0.4s ease both;
}
.card-fade-in:nth-child(1) { animation-delay: 0.04s; }
.card-fade-in:nth-child(2) { animation-delay: 0.08s; }
.card-fade-in:nth-child(3) { animation-delay: 0.12s; }
.card-fade-in:nth-child(4) { animation-delay: 0.16s; }
.card-fade-in:nth-child(5) { animation-delay: 0.20s; }
.card-fade-in:nth-child(n+6) { animation-delay: 0.24s; }

/* ── Slide-up for page sections & panels ───────────────────  */
@keyframes slide-up {
  from { opacity: 0; transform: translateY(24px); }
  to   { opacity: 1; transform: none; }
}
.slide-up {
  animation: slide-up 0.35s cubic-bezier(0.16, 1, 0.3, 1) both;
}

/* ── Pulse for "Available Now" badge ────────────────────────  */
@keyframes available-pulse {
  0%, 100% { box-shadow: 0 0 0 0   rgba(16, 185, 129, 0.55); }
  60%       { box-shadow: 0 0 0 7px rgba(16, 185, 129, 0);    }
}
.badge-available-now {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-semibold);
  padding: 3px 10px;
  border-radius: var(--radius-full);
  background: #D1FAE5;
  color: #065F46;
  animation: available-pulse 2.2s ease-in-out infinite;
}