/* Modern Design System Tokens for CSE Department Directory */

/* 1. Dark Default (GitHub Standard Dark) */
:root[data-theme="dark-default"] {
  --bg: #0d1117;
  --surface: #161b22;
  --surface-hover: #1f242c;
  --border: #30363d;
  --border-muted: #21262d;
  --text: #f0f6fc;
  --text-muted: #8b949e;
  --accent: #58a6ff;
  --accent-subtle: rgba(56, 139, 253, 0.12);
  --btn-bg: #21262d;
  --btn-hover: #30363d;
  --btn-primary-bg: #238636;
  --btn-primary-hover: #2ea043;
  --badge-blood-bg: rgba(248, 81, 73, 0.15);
  --badge-blood-text: #ff7b72;
  --badge-cgpa-bg: rgba(56, 139, 253, 0.12);
  --badge-cgpa-text: #79c0ff;
  --status-sub-bg: rgba(46, 160, 67, 0.15);
  --status-sub-text: #3fb950;
  --status-pen-bg: rgba(210, 153, 34, 0.15);
  --status-pen-text: #d29922;
  --dropdown-bg: #161b22;
  --modal-overlay: rgba(1, 4, 9, 0.75);
}

/* 2. Soft Dark (GitHub Dark Dimmed) */
:root[data-theme="dark-dimmed"] {
  --bg: #22272e;
  --surface: #2d333b;
  --surface-hover: #373e47;
  --border: #444c56;
  --border-muted: #373e47;
  --text: #adbac7;
  --text-muted: #768390;
  --accent: #539bf5;
  --accent-subtle: rgba(83, 155, 245, 0.15);
  --btn-bg: #373e47;
  --btn-hover: #444c56;
  --btn-primary-bg: #347d39;
  --btn-primary-hover: #46954a;
  --badge-blood-bg: rgba(229, 83, 75, 0.18);
  --badge-blood-text: #f47067;
  --badge-cgpa-bg: rgba(83, 155, 245, 0.15);
  --badge-cgpa-text: #6cb6ff;
  --status-sub-bg: rgba(87, 171, 90, 0.18);
  --status-sub-text: #57ab5a;
  --status-pen-bg: rgba(200, 155, 60, 0.18);
  --status-pen-text: #c69026;
  --dropdown-bg: #2d333b;
  --modal-overlay: rgba(28, 33, 40, 0.75);
}

/* 3. Dark Protanopia & Deuteranopia */
:root[data-theme="dark-protanopia"] {
  --bg: #0d1117;
  --surface: #161b22;
  --surface-hover: #1f242c;
  --border: #30363d;
  --border-muted: #21262d;
  --text: #f0f6fc;
  --text-muted: #8b949e;
  --accent: #388bfd;
  --accent-subtle: rgba(56, 139, 253, 0.15);
  --btn-bg: #21262d;
  --btn-hover: #30363d;
  --btn-primary-bg: #bb8009;
  --btn-primary-hover: #d29922;
  --badge-blood-bg: rgba(210, 153, 34, 0.15);
  --badge-blood-text: #e3b341;
  --badge-cgpa-bg: rgba(56, 139, 253, 0.15);
  --badge-cgpa-text: #79c0ff;
  --status-sub-bg: rgba(210, 153, 34, 0.2);
  --status-sub-text: #e3b341;
  --status-pen-bg: rgba(139, 148, 158, 0.15);
  --status-pen-text: #8b949e;
  --dropdown-bg: #161b22;
  --modal-overlay: rgba(1, 4, 9, 0.75);
}

/* 4. Dark Tritanopia */
:root[data-theme="dark-tritanopia"] {
  --bg: #0d1117;
  --surface: #161b22;
  --surface-hover: #1f242c;
  --border: #30363d;
  --border-muted: #21262d;
  --text: #f0f6fc;
  --text-muted: #8b949e;
  --accent: #388bfd;
  --accent-subtle: rgba(56, 139, 253, 0.15);
  --btn-bg: #21262d;
  --btn-hover: #30363d;
  --btn-primary-bg: #da3633;
  --btn-primary-hover: #f85149;
  --badge-blood-bg: rgba(248, 81, 73, 0.15);
  --badge-blood-text: #ff7b72;
  --badge-cgpa-bg: rgba(56, 139, 253, 0.15);
  --badge-cgpa-text: #79c0ff;
  --status-sub-bg: rgba(248, 81, 73, 0.18);
  --status-sub-text: #f85149;
  --status-pen-bg: rgba(139, 148, 158, 0.15);
  --status-pen-text: #8b949e;
  --dropdown-bg: #161b22;
  --modal-overlay: rgba(1, 4, 9, 0.75);
}

/* 5. Light Default (GitHub Standard Light - Pure & Clean) */
:root[data-theme="light-default"] {
  --bg: #f6f8fa;
  --surface: #ffffff;
  --surface-hover: #f3f4f6;
  --border: #d0d7de;
  --border-muted: #e1e4e8;
  --text: #1f2328;
  --text-muted: #656d76;
  --accent: #0969da;
  --accent-subtle: rgba(9, 105, 218, 0.08);
  --btn-bg: #f6f8fa;
  --btn-hover: #eaeef2;
  --btn-primary-bg: #1f883d;
  --btn-primary-hover: #1a7f37;
  --badge-blood-bg: #ffebe9;
  --badge-blood-text: #cf222e;
  --badge-cgpa-bg: #ddf4ff;
  --badge-cgpa-text: #0969da;
  --status-sub-bg: #dafbe1;
  --status-sub-text: #1a7f37;
  --status-pen-bg: #fff8c5;
  --status-pen-text: #9a6700;
  --dropdown-bg: #ffffff;
  --modal-overlay: rgba(31, 35, 40, 0.6);
}

/* 6. Light Protanopia & Deuteranopia */
:root[data-theme="light-protanopia"] {
  --bg: #f6f8fa;
  --surface: #ffffff;
  --surface-hover: #f3f4f6;
  --border: #d0d7de;
  --border-muted: #e1e4e8;
  --text: #1f2328;
  --text-muted: #656d76;
  --accent: #0969da;
  --accent-subtle: rgba(9, 105, 218, 0.08);
  --btn-bg: #f6f8fa;
  --btn-hover: #eaeef2;
  --btn-primary-bg: #9a6700;
  --btn-primary-hover: #7d5300;
  --badge-blood-bg: #fff8c5;
  --badge-blood-text: #9a6700;
  --badge-cgpa-bg: #ddf4ff;
  --badge-cgpa-text: #0969da;
  --status-sub-bg: #fff8c5;
  --status-sub-text: #9a6700;
  --status-pen-bg: #f0f2f5;
  --status-pen-text: #656d76;
  --dropdown-bg: #ffffff;
  --modal-overlay: rgba(31, 35, 40, 0.6);
}

/* 7. Light Tritanopia */
:root[data-theme="light-tritanopia"] {
  --bg: #f6f8fa;
  --surface: #ffffff;
  --surface-hover: #f3f4f6;
  --border: #d0d7de;
  --border-muted: #e1e4e8;
  --text: #1f2328;
  --text-muted: #656d76;
  --accent: #0969da;
  --accent-subtle: rgba(9, 105, 218, 0.08);
  --btn-bg: #f6f8fa;
  --btn-hover: #eaeef2;
  --btn-primary-bg: #cf222e;
  --btn-primary-hover: #a40e26;
  --badge-blood-bg: #ffebe9;
  --badge-blood-text: #cf222e;
  --badge-cgpa-bg: #ddf4ff;
  --badge-cgpa-text: #0969da;
  --status-sub-bg: #ffebe9;
  --status-sub-text: #cf222e;
  --status-pen-bg: #f0f2f5;
  --status-pen-text: #656d76;
  --dropdown-bg: #ffffff;
  --modal-overlay: rgba(31, 35, 40, 0.6);
}

/* Global Reset & Base Typography */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  background-color: var(--bg);
  color: var(--text);
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
  min-height: 100vh;
  line-height: 1.5;
  font-size: 14px;
  overflow-x: hidden;
  transition: background-color 0.15s ease, color 0.15s ease;
}

/* Professional Modern Scrollbars (Chromium & Firefox) */
* {
  scrollbar-width: thin;
  scrollbar-color: var(--border) transparent;
}

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

::-webkit-scrollbar-track {
  background: transparent;
}

::-webkit-scrollbar-thumb {
  background: var(--border);
  border-radius: 4px;
  border: 2px solid transparent;
  background-clip: padding-box;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--text-muted);
  border: 2px solid transparent;
  background-clip: padding-box;
}

/* Top Strip */
.top-strip {
  border-bottom: 1px solid var(--border);
  padding: 6px 20px;
  font-size: 12px;
  color: var(--text-muted);
  display: flex;
  justify-content: space-between;
  align-items: center;
  background: var(--surface);
  gap: 12px;
}

.top-strip-left {
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.top-strip-right {
  white-space: nowrap;
  font-weight: 500;
}

/* Header & Nav */
header {
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 40;
}

.nav-inner {
  max-width: 1360px;
  margin: 0 auto;
  padding: 10px 20px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
}

.brand-wrap {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  color: inherit;
  min-width: 0;
}

.brand-icon {
  width: 32px;
  height: 32px;
  border-radius: 6px;
  background: var(--btn-bg);
  border: 1px solid var(--border);
  color: var(--accent);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 13px;
  flex-shrink: 0;
}

.brand-text {
  min-width: 0;
}

.brand-title {
  font-size: 14px;
  font-weight: 600;
  color: var(--text);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.brand-sub {
  font-size: 11px;
  color: var(--text-muted);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.nav-tools {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-shrink: 0;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 5px 11px;
  border-radius: 6px;
  font-size: 12px;
  font-weight: 500;
  cursor: pointer;
  border: 1px solid var(--border);
  background: var(--btn-bg);
  color: var(--text);
  text-decoration: none;
  transition: all 0.15s ease;
  line-height: 20px;
  white-space: nowrap;
  user-select: none;
}

.btn:hover {
  background: var(--btn-hover);
  border-color: var(--text-muted);
}

.btn-green {
  background: var(--btn-primary-bg);
  border-color: rgba(240, 246, 252, 0.1);
  color: #fff;
}

.btn-green:hover {
  background: var(--btn-primary-hover);
  border-color: rgba(240, 246, 252, 0.2);
}

/* Catalog Header */
.catalog-header {
  max-width: 1360px;
  margin: 18px auto 14px;
  padding: 0 20px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 10px;
}

.catalog-heading h2 {
  font-size: 20px;
  font-weight: 600;
  letter-spacing: -0.01em;
}

.catalog-summary-chips {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 12px;
  color: var(--text-muted);
  flex-wrap: wrap;
}

.summary-chip strong {
  color: var(--text);
}

/* Action Bar (Search & Filter) */
.action-bar {
  max-width: 1360px;
  margin: 0 auto 18px;
  padding: 0 20px;
  display: flex;
  gap: 10px;
  position: relative;
  align-items: center;
}

.search-wrap {
  flex: 1;
  position: relative;
  min-width: 0;
}

.search-input {
  width: 100%;
  background: var(--surface);
  border: 1px solid var(--border);
  padding: 7px 12px 7px 34px;
  border-radius: 6px;
  font-size: 13px;
  color: var(--text);
  outline: none;
  transition: border-color 0.15s, box-shadow 0.15s;
}

.search-input:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 2px var(--accent-subtle);
}

.search-icon-svg {
  position: absolute;
  left: 10px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-muted);
  pointer-events: none;
}

.filter-btn {
  position: relative;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 7px 12px;
  border-radius: 6px;
  font-size: 13px;
  font-weight: 500;
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text);
  cursor: pointer;
  user-select: none;
  white-space: nowrap;
}

.filter-btn:hover {
  background: var(--btn-hover);
}

/* Filter Dropdown Popover */
.filter-popover {
  position: absolute;
  top: 100%;
  right: 20px;
  margin-top: 6px;
  background: var(--dropdown-bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  box-shadow: 0 16px 32px rgba(0, 0, 0, 0.35);
  width: 320px;
  max-width: calc(100vw - 40px);
  padding: 16px;
  z-index: 50;
  display: none;
  flex-direction: column;
  gap: 14px;
}

.filter-popover.open {
  display: flex;
}

.filter-popover-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-bottom: 1px solid var(--border);
  padding-bottom: 8px;
}

.filter-popover-header h4 {
  font-size: 12px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.filter-clear-btn {
  background: none;
  border: none;
  color: var(--accent);
  font-size: 11px;
  cursor: pointer;
}

.filter-section-title {
  font-size: 11px;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  margin-bottom: 6px;
}

.filter-pills-row {
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
}

.filter-pill {
  background: var(--btn-bg);
  border: 1px solid var(--border);
  color: var(--text-muted);
  padding: 3px 8px;
  border-radius: 14px;
  font-size: 11px;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.15s;
}

.filter-pill.active {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
}

.filter-select-input {
  width: 100%;
  background: var(--bg);
  border: 1px solid var(--border);
  color: var(--text);
  padding: 5px 8px;
  border-radius: 6px;
  font-size: 12px;
  outline: none;
}

/* Student Cards Grid */
.grid-wrap {
  max-width: 1360px;
  margin: 0 auto 60px;
  padding: 0 20px;
}

.students-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 14px;
}

.student-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 14px 16px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  text-decoration: none;
  color: inherit;
  transition: all 0.15s ease;
  cursor: pointer;
  position: relative;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.05);
}

.student-card:hover {
  background: var(--surface-hover);
  border-color: var(--accent);
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
}

.student-card.my-portfolio {
  border: 2px solid var(--accent);
  background: var(--surface-hover);
  box-shadow: 0 0 16px var(--accent-subtle);
}

.my-portfolio-badge {
  position: absolute;
  top: 10px;
  right: 12px;
  background: var(--accent-subtle);
  border: 1px solid var(--accent);
  color: var(--accent);
  font-size: 10px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  padding: 2px 7px;
  border-radius: 10px;
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

.card-top {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 12px;
}

.avatar-circle {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  object-fit: cover;
  background: var(--border);
  border: 1px solid var(--border);
  flex-shrink: 0;
}

.avatar-fallback {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--btn-bg);
  border: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  font-weight: 600;
  color: var(--text-muted);
  flex-shrink: 0;
}

.student-info h3 {
  font-size: 14px;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 1px;
}

.student-meta-line {
  font-size: 11px;
  color: var(--text-muted);
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
}

/* Badges & Tags */
.tags-row {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-bottom: 10px;
  align-items: center;
}

.tag-chip {
  font-size: 11px;
  font-weight: 500;
  padding: 2px 8px;
  border-radius: 12px;
  border: 1px solid transparent;
  display: inline-flex;
  align-items: center;
  gap: 4px;
  line-height: 16px;
}

.chip-blood {
  background: var(--badge-blood-bg);
  color: var(--badge-blood-text);
  border: 1px solid rgba(207, 34, 46, 0.2);
}

.chip-cgpa {
  background: var(--badge-cgpa-bg);
  color: var(--badge-cgpa-text);
  border: 1px solid rgba(9, 105, 218, 0.2);
}

.chip-sub {
  background: var(--status-sub-bg);
  color: var(--status-sub-text);
  border: 1px solid rgba(31, 136, 61, 0.2);
}

.chip-pen {
  background: var(--status-pen-bg);
  color: var(--status-pen-text);
  border: 1px solid rgba(154, 103, 0, 0.2);
}

@keyframes cardEntrance {
  from {
    opacity: 0;
    transform: translateY(12px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.student-card.anim-enter {
  animation: cardEntrance 0.3s cubic-bezier(0.16, 1, 0.3, 1) both;
}

/* Load More Container & Spinner */
.load-more-wrap {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  margin-top: 24px;
  gap: 8px;
}

.btn-load-more {
  padding: 9px 24px;
  font-size: 13px;
  font-weight: 600;
  border-radius: 20px;
  background: var(--surface);
  border: 1px solid var(--border);
  color: var(--text);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
  transition: all 0.2s cubic-bezier(0.16, 1, 0.3, 1);
}

.btn-load-more:hover {
  background: var(--surface-hover);
  border-color: var(--accent);
  color: var(--accent);
  transform: translateY(-2px);
  box-shadow: 0 6px 16px rgba(0, 0, 0, 0.15);
}

.load-more-count {
  font-size: 12px;
  color: var(--text-muted);
}

@keyframes spin {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

.load-spinner {
  animation: spin 0.8s linear infinite;
}

.card-action-bar {
  border-top: 1px solid var(--border-muted);
  padding-top: 8px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 12px;
  color: var(--accent);
  font-weight: 500;
}

/* Modals */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: var(--modal-overlay);
  backdrop-filter: blur(4px);
  z-index: 1000;
  display: none;
  align-items: center;
  justify-content: center;
  padding: 16px;
}

.modal-box {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 8px;
  width: 100%;
  max-width: 380px;
  padding: 20px;
  box-shadow: 0 16px 32px rgba(0, 0, 0, 0.4);
}

/* Consolidated Settings Modal */
.settings-modal-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  width: 100%;
  max-width: 780px;
  max-height: 85vh;
  display: flex;
  flex-direction: column;
  box-shadow: 0 24px 48px rgba(0, 0, 0, 0.5);
  overflow: hidden;
}

.settings-modal-header {
  padding: 18px 24px;
  border-bottom: 1px solid var(--border);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.settings-modal-header h3 {
  font-size: 16px;
  font-weight: 600;
}

.settings-close-btn {
  background: none;
  border: none;
  color: var(--text-muted);
  font-size: 20px;
  cursor: pointer;
  line-height: 1;
}

.settings-close-btn:hover {
  color: var(--text);
}

.settings-modal-body {
  padding: 20px 24px;
  overflow-y: auto;
  flex: 1;
}

.settings-section-card {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 14px 16px;
  margin-bottom: 20px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
}

.settings-section-title {
  font-size: 13px;
  font-weight: 600;
  margin-bottom: 2px;
  color: var(--text);
}

.settings-section-sub {
  font-size: 12px;
  color: var(--text-muted);
  line-height: 1.35;
}

.settings-toggle-btn {
  padding: 6px 14px;
  font-weight: 600;
}

/* Theme Option Grid */
.theme-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 14px;
  margin-top: 10px;
}

.theme-option-card {
  background: var(--bg);
  border: 2px solid var(--border);
  border-radius: 8px;
  padding: 12px;
  cursor: pointer;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: all 0.15s ease;
  user-select: none;
}

.theme-option-card:hover {
  border-color: var(--text-muted);
}

.theme-option-card.selected {
  border-color: var(--accent);
  box-shadow: 0 0 0 1px var(--accent);
}

.theme-preview-box {
  border: 1px solid var(--border);
  border-radius: 6px;
  height: 82px;
  padding: 8px 10px;
  margin-bottom: 12px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  position: relative;
  overflow: hidden;
}

.preview-header-line {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 6px;
}

.preview-pills {
  display: flex;
  gap: 4px;
}

.preview-pill {
  height: 4px;
  border-radius: 2px;
  width: 22px;
}

.preview-badge-beta {
  font-size: 8px;
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 0 4px;
  line-height: 12px;
  opacity: 0.8;
}

.preview-subline-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 6px;
}

.preview-subline {
  height: 4px;
  border-radius: 2px;
  width: 38px;
}

.preview-dots {
  display: flex;
  gap: 3px;
}

.preview-dot {
  width: 5px;
  height: 5px;
  border-radius: 1px;
}

.preview-body-row {
  display: flex;
  gap: 6px;
  align-items: flex-end;
  height: 38px;
}

.preview-main-canvas {
  flex: 1;
  height: 100%;
  border-radius: 4px;
  padding: 6px;
  display: flex;
  flex-direction: column;
  justify-content: flex-start;
  border: 1px solid rgba(120, 120, 120, 0.15);
}

.preview-accent-bar {
  height: 8px;
  border-radius: 3px;
  width: 75%;
}

.preview-sidebar {
  width: 24px;
  height: 100%;
  border-radius: 4px;
}

.theme-label-row {
  display: flex;
  align-items: center;
  gap: 8px;
}

.theme-radio {
  accent-color: var(--accent);
}

.theme-title {
  font-size: 13px;
  font-weight: 600;
  color: var(--text);
}

.theme-desc {
  font-size: 11px;
  color: var(--text-muted);
  line-height: 1.35;
  margin-top: 4px;
}

/* ==========================================================
   MOBILE & RESPONSIVE POLISH (Samsung Galaxy, iPhones, Tablets)
   ========================================================== */
@media (max-width: 768px) {
  .top-strip {
    font-size: 11px;
    padding: 6px 14px;
  }

  .nav-inner {
    padding: 10px 14px;
    flex-direction: column;
    align-items: stretch;
    gap: 10px;
  }

  .brand-wrap {
    justify-content: flex-start;
  }

  .nav-tools {
    display: flex;
    justify-content: space-between;
    width: 100%;
    gap: 6px;
  }

  .nav-tools .btn {
    flex: 1;
    justify-content: center;
    padding: 6px 8px;
    font-size: 11px;
  }

  .catalog-header {
    padding: 14px 14px 8px;
    flex-direction: column;
    align-items: flex-start;
    gap: 6px;
  }

  .catalog-heading h2 {
    font-size: 18px;
  }

  .action-bar {
    padding: 0 14px 14px;
    flex-direction: row;
    gap: 8px;
  }

  .grid-wrap {
    padding: 0 14px 40px;
  }

  .students-grid {
    grid-template-columns: 1fr;
    gap: 10px;
  }

  .settings-modal-card {
    max-width: 95vw;
    max-height: 90vh;
  }

  .settings-modal-header {
    padding: 14px 16px;
  }

  .settings-modal-body {
    padding: 14px 16px;
  }

  .theme-grid {
    grid-template-columns: 1fr;
  }
}