/* ==========================================================================
   SLG (StarLink Goods Pvt Ltd.) — Core Stylesheet
   Design Tokens, CSS Reset, Typography, Buttons & Utilities
   ========================================================================== */

:root {
  /* Brand Color Palette */
  --color-primary: #0B192C;        /* Executive Deep Navy */
  --color-primary-light: #1E3E62;  /* Slate Navy */
  --color-primary-dark: #050C16;   /* Midnight */
  --color-accent: #FF6500;         /* Trust Warm Orange */
  --color-accent-hover: #E55B00;   /* Deep Orange */
  --color-accent-light: #FFF1E8;   /* Soft Peach */
  --color-success: #059669;        /* Verified Emerald */
  --color-success-light: #ECFDF5;
  --color-warning: #D97706;        /* Amber Notice */
  --color-warning-light: #FFFBEB;
  --color-danger: #DC2626;         /* Rose Red */
  --color-danger-light: #FEF2F2;

  /* Neutrals */
  --color-bg: #F8FAFC;            /* Clean Canvas Slate */
  --color-surface: #FFFFFF;       /* Pure White Card */
  --color-surface-hover: #F1F5F9;
  --color-border: #E2E8F0;        /* Subtle Border */
  --color-border-strong: #CBD5E1;
  --color-text-main: #0F172A;     /* Slate 900 Text */
  --color-text-muted: #64748B;    /* Slate 500 Subtext */
  --color-text-light: #94A3B8;

  /* Typography */
  --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;

  /* Elevation Shadows */
  --shadow-xs: 0 1px 2px 0 rgba(15, 23, 42, 0.05);
  --shadow-sm: 0 1px 3px 0 rgba(15, 23, 42, 0.1), 0 1px 2px -1px rgba(15, 23, 42, 0.1);
  --shadow-md: 0 4px 6px -1px rgba(15, 23, 42, 0.1), 0 2px 4px -2px rgba(15, 23, 42, 0.1);
  --shadow-lg: 0 10px 15px -3px rgba(15, 23, 42, 0.1), 0 4px 6px -4px rgba(15, 23, 42, 0.1);
  --shadow-xl: 0 20px 25px -5px rgba(15, 23, 42, 0.1), 0 8px 10px -6px rgba(15, 23, 42, 0.1);

  /* Radii */
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 14px;
  --radius-xl: 20px;
  --radius-full: 9999px;

  /* Transitions */
  --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-normal: 250ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-smooth: 350ms cubic-bezier(0.4, 0, 0.2, 1);

  /* Layout Widths */
  --container-max: 1280px;
  --header-height: 72px;
  --announcement-height: 40px;
}

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-family);
  background-color: var(--color-bg);
  color: var(--color-text-main);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

main {
  flex: 1 0 auto;
}

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

input, button, textarea, select {
  font: inherit;
  color: inherit;
}

button {
  cursor: pointer;
  border: none;
  background: none;
}

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

ul, ol {
  list-style: none;
}

/* Accessibility Focus States */
:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 3px;
}

.skip-to-content {
  position: absolute;
  top: -100px;
  left: 1rem;
  background: var(--color-primary);
  color: #fff;
  padding: 0.75rem 1.25rem;
  border-radius: var(--radius-sm);
  z-index: 9999;
  font-weight: 600;
  transition: top var(--transition-fast);
}

.skip-to-content:focus {
  top: 1rem;
}

/* ---------------- Containers & Layout ---------------- */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin-left: auto;
  margin-right: auto;
  padding-left: 1.25rem;
  padding-right: 1.25rem;
}

.section {
  padding-top: 3.5rem;
  padding-bottom: 3.5rem;
}

.section-title {
  font-size: 1.875rem;
  font-weight: 700;
  color: var(--color-primary);
  letter-spacing: -0.025em;
  margin-bottom: 0.5rem;
}

.section-subtitle {
  font-size: 1.05rem;
  color: var(--color-text-muted);
  max-width: 680px;
}

.section-header {
  margin-bottom: 2.25rem;
}

.section-header.text-center {
  text-align: center;
}

.section-header.text-center .section-subtitle {
  margin-left: auto;
  margin-right: auto;
}

/* ---------------- Typography ---------------- */
h1, h2, h3, h4, h5, h6 {
  color: var(--color-primary);
  font-weight: 700;
  line-height: 1.25;
}

h1 { font-size: 2.25rem; }
h2 { font-size: 1.875rem; }
h3 { font-size: 1.35rem; }
h4 { font-size: 1.15rem; }

p {
  margin-bottom: 1rem;
}

p:last-child {
  margin-bottom: 0;
}

.text-muted { color: var(--color-text-muted); }
.text-accent { color: var(--color-accent); }
.text-success { color: var(--color-success); }
.text-danger { color: var(--color-danger); }
.font-semibold { font-weight: 600; }
.font-bold { font-weight: 700; }
.font-mono { font-family: var(--font-mono); }

/* ---------------- Buttons ---------------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  font-weight: 600;
  font-size: 0.95rem;
  padding: 0.75rem 1.35rem;
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
  white-space: nowrap;
  user-select: none;
  min-height: 46px;
}

.btn-primary {
  background-color: var(--color-primary);
  color: #FFFFFF;
}

.btn-primary:hover {
  background-color: var(--color-primary-light);
  transform: translateY(-1px);
  box-shadow: var(--shadow-sm);
}

.btn-accent {
  background-color: var(--color-accent);
  color: #FFFFFF;
}

.btn-accent:hover {
  background-color: var(--color-accent-hover);
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(255, 101, 0, 0.25);
}

.btn-secondary {
  background-color: #FFFFFF;
  color: var(--color-primary);
  border: 1px solid var(--color-border-strong);
}

.btn-secondary:hover {
  background-color: var(--color-surface-hover);
  border-color: var(--color-primary-light);
}

.btn-outline-accent {
  background-color: transparent;
  color: var(--color-accent);
  border: 1px solid var(--color-accent);
}

.btn-outline-accent:hover {
  background-color: var(--color-accent-light);
}

.btn-sm {
  font-size: 0.85rem;
  padding: 0.45rem 0.85rem;
  min-height: 36px;
  border-radius: var(--radius-sm);
}

.btn-lg {
  font-size: 1.05rem;
  padding: 0.95rem 1.85rem;
  min-height: 52px;
  border-radius: var(--radius-lg);
}

.btn-block {
  width: 100%;
}

.btn:disabled, .btn[aria-disabled="true"] {
  opacity: 0.55;
  cursor: not-allowed;
  transform: none !important;
  box-shadow: none !important;
}

/* ---------------- Badges & Tags ---------------- */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  font-size: 0.75rem;
  font-weight: 600;
  padding: 0.25rem 0.65rem;
  border-radius: var(--radius-full);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.badge-primary { background: #E2E8F0; color: var(--color-primary); }
.badge-accent { background: var(--color-accent-light); color: var(--color-accent); }
.badge-success { background: var(--color-success-light); color: var(--color-success); }
.badge-warning { background: var(--color-warning-light); color: var(--color-warning); }
.badge-danger { background: var(--color-danger-light); color: var(--color-danger); }

/* Energy Star Rating Badge */
.energy-star-badge {
  display: inline-flex;
  align-items: center;
  gap: 3px;
  background: #FEF3C7;
  color: #B45309;
  border: 1px solid #FCD34D;
  font-size: 0.75rem;
  font-weight: 700;
  padding: 0.2rem 0.5rem;
  border-radius: var(--radius-sm);
}

/* ---------------- Forms & Inputs ---------------- */
.form-group {
  margin-bottom: 1.25rem;
}

.form-label {
  display: block;
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--color-text-main);
  margin-bottom: 0.4rem;
}

.form-label .required {
  color: var(--color-danger);
  margin-left: 2px;
}

.form-control {
  width: 100%;
  padding: 0.75rem 1rem;
  font-size: 0.95rem;
  border: 1px solid var(--color-border-strong);
  border-radius: var(--radius-md);
  background-color: #FFFFFF;
  color: var(--color-text-main);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.form-control:focus {
  outline: none;
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px rgba(255, 101, 0, 0.15);
}

.form-control::placeholder {
  color: var(--color-text-light);
}

.form-hint {
  font-size: 0.8rem;
  color: var(--color-text-muted);
  margin-top: 0.35rem;
}

.form-error {
  font-size: 0.8rem;
  color: var(--color-danger);
  margin-top: 0.35rem;
  display: none;
}

.has-error .form-control {
  border-color: var(--color-danger);
}

.has-error .form-error {
  display: block;
}

/* Phone input group with country code */
.phone-input-group {
  display: flex;
  align-items: center;
  border: 1px solid var(--color-border-strong);
  border-radius: var(--radius-md);
  background: #FFFFFF;
  overflow: hidden;
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.phone-input-group:focus-within {
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px rgba(255, 101, 0, 0.15);
}

.phone-prefix {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.75rem 0.9rem;
  background-color: var(--color-bg);
  border-right: 1px solid var(--color-border);
  font-weight: 600;
  font-size: 0.95rem;
  color: var(--color-text-main);
  user-select: none;
}

.phone-input-group .form-control {
  border: none;
  border-radius: 0;
  box-shadow: none !important;
}

/* OTP 6-Box Inputs */
.otp-boxes-wrapper {
  display: flex;
  justify-content: space-between;
  gap: 0.5rem;
  margin: 1.5rem 0;
}

.otp-digit-box {
  width: 48px;
  height: 56px;
  text-align: center;
  font-size: 1.5rem;
  font-weight: 700;
  border: 1.5px solid var(--color-border-strong);
  border-radius: var(--radius-md);
  background: #FFFFFF;
  color: var(--color-primary);
  transition: all var(--transition-fast);
}

.otp-digit-box:focus {
  outline: none;
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px rgba(255, 101, 0, 0.15);
  transform: scale(1.04);
}

/* Custom Checkbox / Radio */
.checkbox-label {
  display: flex;
  align-items: flex-start;
  gap: 0.65rem;
  font-size: 0.9rem;
  color: var(--color-text-main);
  cursor: pointer;
  user-select: none;
}

.checkbox-label input[type="checkbox"],
.checkbox-label input[type="radio"] {
  width: 1.15rem;
  height: 1.15rem;
  margin-top: 0.15rem;
  accent-color: var(--color-accent);
  cursor: pointer;
}

/* ---------------- Cards & Surfaces ---------------- */
.card {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-xs);
  transition: transform var(--transition-normal), box-shadow var(--transition-normal);
}

.card-padded {
  padding: 1.5rem;
}

.card-hover:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
  border-color: var(--color-border-strong);
}

/* ---------------- Toast Notifications ---------------- */
.toast-container {
  position: fixed;
  bottom: 1.5rem;
  right: 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  z-index: 10000;
  max-width: 380px;
  width: calc(100% - 3rem);
  pointer-events: none;
}

.toast {
  display: flex;
  align-items: center;
  gap: 0.85rem;
  background: var(--color-primary);
  color: #FFFFFF;
  padding: 0.9rem 1.25rem;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  font-size: 0.9rem;
  font-weight: 500;
  pointer-events: auto;
  animation: toastIn 0.3s cubic-bezier(0.16, 1, 0.3, 1);
  border-left: 4px solid var(--color-accent);
}

.toast.toast-success { border-left-color: var(--color-success); }
.toast.toast-danger { border-left-color: var(--color-danger); }
.toast.toast-warning { border-left-color: var(--color-warning); }

@keyframes toastIn {
  from { opacity: 0; transform: translateY(16px); }
  to { opacity: 1; transform: translateY(0); }
}

/* ---------------- Modal Backdrop ---------------- */
.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(11, 25, 44, 0.7);
  backdrop-filter: blur(4px);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1.25rem;
  z-index: 9000;
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--transition-normal), visibility var(--transition-normal);
}

.modal-overlay.active {
  opacity: 1;
  visibility: visible;
}

.modal-dialog {
  background: #FFFFFF;
  border-radius: var(--radius-xl);
  max-width: 520px;
  width: 100%;
  box-shadow: var(--shadow-xl);
  transform: scale(0.95);
  transition: transform var(--transition-normal);
  overflow: hidden;
  max-height: 90vh;
  display: flex;
  flex-direction: column;
}

.modal-overlay.active .modal-dialog {
  transform: scale(1);
}

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.25rem 1.5rem;
  border-bottom: 1px solid var(--color-border);
}

.modal-title {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--color-primary);
}

.modal-close {
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-full);
  color: var(--color-text-muted);
  transition: background var(--transition-fast);
}

.modal-close:hover {
  background: var(--color-surface-hover);
  color: var(--color-text-main);
}

.modal-body {
  padding: 1.5rem;
  overflow-y: auto;
}

.modal-footer {
  padding: 1rem 1.5rem;
  border-top: 1px solid var(--color-border);
  background: var(--color-bg);
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 0.75rem;
}