/* ============================================================ L1L.xyz — Linear-Inspired Dark Design System Minimal. Precise. Dark-mode-native. Font: Inter (Google Fonts) with cv01 + ss03 OpenType features === CDN link required in every page === ============================================================ */ /* ── 1. Design Tokens ─────────────────────────────────── */ :root { /* ── Background Surfaces (dark luminance stack) ── */ --color-bg: #08090a; /* Marketing Black — deepest canvas */ --color-bg-panel: #0f1011; /* Panel Dark — sidebar, nav bars */ --color-bg-elevated: #191a1b; /* Level 3 — cards, containers */ --color-bg-hover: #28282c; /* Secondary — hover states */ --color-surface: rgba(255,255,255,0.02); --color-surface-hover: rgba(255,255,255,0.05); /* ── Text (cool grayscale) ── */ --color-text: #f7f8f8; /* Primary — near-white (not pure) */ --color-text-secondary: #d0d6e0; /* Silver — body, descriptions */ --color-text-muted: #8a8f98; /* Tertiary — metadata, placeholders */ --color-text-disabled: #62666d; /* Quaternary — disabled */ /* ── Brand (indigo-violet accent) ── */ --color-primary: #5e6ad2; /* Brand Indigo — CTA, active */ --color-primary-hover: #828fff; /* Light Violet — hover */ --color-primary-light: rgba(94,106,210,0.12); --color-primary-gradient: linear-gradient(135deg, #5e6ad2 0%, #7170ff 100%); --color-primary-gradient-h: linear-gradient(to right, #5e6ad2, #7170ff); /* ── Borders (whisper-thin translucent white) ── */ --color-border: rgba(255,255,255,0.08); --color-border-light: rgba(255,255,255,0.05); --color-border-solid: #23252a; /* ── Status ── */ --color-danger: #e5484d; --color-success: #27a644; --color-warning: #f5a623; --color-star: #f5a623; /* ── Typography ── */ --font-family: 'Inter', system-ui, -apple-system, 'Segoe UI', Roboto, sans-serif; --font-size-xs: 0.69rem; /* 11px */ --font-size-sm: 0.81rem; /* 13px */ --font-size-base: 0.88rem; /* 14px */ --font-size-md: 1.00rem; /* 16px */ --font-size-lg: 1.25rem; /* 20px */ --font-size-xl: 1.50rem; /* 24px */ --font-size-2xl: 1.75rem; /* 28px */ --font-weight-light: 300; --font-weight-normal: 400; --font-weight-medium: 500; /* Linear's 510 mapped to 500 */ --font-weight-semibold: 600; /* Linear's 590 mapped to 600 */ --font-weight-bold: 600; /* No 700 — Linear caps at 590 */ --line-height: 1.5; /* ── Spacing ── */ --space-xs: 0.25rem; --space-sm: 0.5rem; --space-md: 0.75rem; --space-lg: 1rem; --space-xl: 1.25rem; --space-2xl: 1.5rem; --space-3xl: 2rem; /* ── Border Radius ── */ --radius-sm: 4px; --radius-md: 6px; --radius-lg: 8px; --radius-xl: 12px; --radius-full: 9999px; /* ── Shadows (dark-surface adapted) ── */ --shadow-xs: rgba(0,0,0,0.2) 0px 0px 0px 1px; --shadow-sm: rgba(0,0,0,0.4) 0px 2px 4px; --shadow-md: rgba(0,0,0,0.01) 0px 5px 2px, rgba(0,0,0,0.04) 0px 3px 2px, rgba(0,0,0,0.08) 0px 0px 1px; --shadow-lg: rgba(0,0,0,0.4) 0px 8px 24px; --shadow-xl: rgba(0,0,0,0.5) 0px 12px 32px; --shadow-primary: 0 4px 12px rgba(94,106,210,0.25); --shadow-primary-lg: 0 8px 24px rgba(94,106,210,0.3); /* ── Layout ── */ --topbar-height: 56px; --bottombar-height: 56px; --sidebar-width: 250px; /* ── Transitions ── */ --transition-fast: 0.12s ease; --transition-normal: 0.18s ease; --transition-slow: 0.25s ease; /* ── Z-Index Scale ── */ --z-dropdown: 1000; --z-sticky: 1020; --z-fixed: 1030; --z-modal-backdrop: 1040; --z-modal: 1050; --z-toast: 1060; } /* ── 2. Reset & Base ─────────────────────────────────── */ *, *::before, *::after { box-sizing: border-box; } body { margin: 0; font-family: var(--font-family); font-size: var(--font-size-base); color: var(--color-text-secondary); background-color: var(--color-bg); line-height: var(--line-height); -webkit-font-smoothing: antialiased; -moz-osx-font-smoothing: grayscale; overflow-x: hidden; font-feature-settings: 'cv01', 'ss03'; } a { color: var(--color-primary); text-decoration: none; transition: color var(--transition-normal); } a:hover { color: var(--color-primary-hover); } img { max-width: 100%; height: auto; } input, button, select, textarea { font-family: inherit; font-size: inherit; } /* ── 3. Focus & Accessibility ─────────────────────────── */ :focus-visible { outline: 2px solid var(--color-primary); outline-offset: 2px; } button, .nav-item, .clickable { cursor: pointer; min-height: 44px; min-width: 44px; } /* ── 4. Typography Utilities ──────────────────────────── */ .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-md { font-size: var(--font-size-md); } .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-primary { color: var(--color-text); } .text-secondary { color: var(--color-text-secondary); } .text-muted { color: var(--color-text-muted); } .text-brand { color: var(--color-primary); } .text-danger { color: var(--color-danger); } .text-success { color: var(--color-success); } .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-truncate { white-space: nowrap; overflow: hidden; text-overflow: ellipsis; } .text-clamp-2 { display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; } /* ── 5. Layout Containers ─────────────────────────────── */ .page-container { width: 100%; max-width: 100%; margin: 0 auto; padding-left: 16px; padding-right: 16px; } @media (min-width: 768px) { .page-container { max-width: 720px; padding-left: 0; padding-right: 0; } } @media (min-width: 1024px) { .page-container { max-width: 960px; } } .page-container-wide { width: 100%; max-width: 100%; margin: 0 auto; padding-left: 16px; padding-right: 16px; } @media (min-width: 768px) { .page-container-wide { padding-left: var(--space-lg); padding-right: var(--space-lg); } } .safe-bottom { padding-bottom: calc(var(--bottombar-height) + env(safe-area-inset-bottom, 0px)); } .safe-bottom-only { padding-bottom: env(safe-area-inset-bottom, 0px); } /* ── 6. Header / Top Bar ──────────────────────────────── */ .page-header { padding: var(--space-md) var(--space-lg); background: var(--color-bg-panel); border-bottom: 1px solid var(--color-border-light); position: sticky; top: 0; z-index: var(--z-sticky); } .page-header-gradient { background: var(--color-primary-gradient-h); border-bottom: none; } /* ── 7. Cards (Linear-style: translucent bg + subtle border) ── */ .card { background: var(--color-surface); border: 1px solid var(--color-border); border-radius: var(--radius-lg); overflow: hidden; } .card-body { padding: var(--space-2xl); } .card-hover { transition: border-color var(--transition-normal), background var(--transition-normal); } .card-hover:hover { border-color: var(--color-primary); background: var(--color-surface-hover); } /* Teacher card */ .card-teacher { display: flex; align-items: flex-start; gap: var(--space-md); padding: var(--space-md); margin-bottom: var(--space-md); background: var(--color-surface); border: 1px solid var(--color-border); border-radius: var(--radius-lg); } .card-teacher:hover { border-color: var(--color-primary); background: var(--color-surface-hover); } /* Course card (horizontal, image + body) */ .card-course { display: flex; margin-bottom: var(--space-lg); background: var(--color-surface); border: 1px solid var(--color-border); border-radius: var(--radius-lg); overflow: hidden; } .card-course-cover { width: 120px; height: 120px; object-fit: cover; flex-shrink: 0; } .card-course-body { padding: var(--space-lg); flex: 1; display: flex; flex-direction: column; justify-content: center; min-width: 0; } @media (min-width: 768px) { .card-course-cover { width: 200px; height: 160px; } .card-course-body { max-width: 500px; } } @media (min-width: 1024px) { .card-course-cover { width: 240px; height: 180px; } .card-course-body { max-width: 520px; padding: var(--space-xl) var(--space-lg); } } /* Section card */ .card-section { background: var(--color-surface); border: 1px solid var(--color-border); border-radius: var(--radius-lg); padding: var(--space-lg); margin-bottom: var(--space-lg); } /* ── 8. Buttons ───────────────────────────────────────── */ .btn { display: inline-flex; align-items: center; justify-content: center; gap: var(--space-xs); padding: 0.5rem 1rem; font-size: var(--font-size-sm); font-weight: var(--font-weight-medium); border: 1px solid var(--color-border); border-radius: var(--radius-md); cursor: pointer; transition: all var(--transition-normal); text-decoration: none; min-height: 36px; line-height: 1.4; background: var(--color-surface); color: var(--color-text-secondary); } .btn:hover { border-color: var(--color-primary); background: var(--color-surface-hover); color: var(--color-text); } .btn-primary { background: var(--color-primary); color: #ffffff; border-color: var(--color-primary); } .btn-primary:hover { background: var(--color-primary-hover); border-color: var(--color-primary-hover); box-shadow: var(--shadow-primary); color: #ffffff; } .btn-gradient { background: var(--color-primary-gradient-h); color: #ffffff; border-color: transparent; } .btn-gradient:hover { box-shadow: var(--shadow-primary-lg); color: #ffffff; } .btn-block { width: 100%; } .btn-sm { padding: 0.35rem 0.75rem; font-size: var(--font-size-xs); min-height: 32px; } .btn-lg { padding: 0.7rem 1.5rem; font-size: var(--font-size-md); } .btn-outline { background: transparent; border: 1px solid var(--color-border); color: var(--color-text-secondary); } .btn-outline:hover { border-color: var(--color-primary); color: var(--color-text); background: var(--color-surface-hover); } /* ── 9. Forms ─────────────────────────────────────────── */ .form-group { margin-bottom: var(--space-xl); position: relative; } .form-control { width: 100%; padding: 10px 14px; font-size: var(--font-size-md); border: 1px solid var(--color-border); border-radius: var(--radius-md); background: var(--color-surface); color: var(--color-text-secondary); transition: border-color var(--transition-normal), box-shadow var(--transition-normal); } .form-control:focus { border-color: var(--color-primary); box-shadow: 0 0 0 2px var(--color-primary-light); outline: none; color: var(--color-text); } .form-control::placeholder { color: var(--color-text-muted); } .form-control.has-icon { padding-left: 40px; } .form-icon { position: absolute; left: 14px; top: 50%; transform: translateY(-50%); color: var(--color-text-muted); pointer-events: none; z-index: 1; } /* Search box */ .search-box { position: relative; display: flex; align-items: center; } .search-box .search-icon { position: absolute; left: 12px; top: 50%; transform: translateY(-50%); color: var(--color-text-muted); z-index: 1; font-size: var(--font-size-base); } .search-box .form-control { padding-left: 2.25rem; border-radius: var(--radius-md) 0 0 var(--radius-md); border-right: none; } .search-btn { background: var(--color-primary); color: #ffffff; border: none; border-radius: 0 var(--radius-md) var(--radius-md) 0; padding: 0.6rem 1rem; cursor: pointer; transition: background var(--transition-normal); min-height: 44px; } .search-btn:hover { background: var(--color-primary-hover); } .search-pill { border-radius: var(--radius-full) !important; border: 1px solid var(--color-border) !important; background: var(--color-surface); padding: 0.5rem 1rem 0.5rem 2.5rem; } /* ── 10. Bottom Navigation ────────────────────────────── */ .bottom-nav { position: fixed; bottom: 0; left: 0; right: 0; background: var(--color-bg-panel); border-top: 1px solid var(--color-border-light); padding: var(--space-sm); padding-bottom: calc(var(--space-sm) + env(safe-area-inset-bottom, 0px)); z-index: var(--z-fixed); } .nav-item { text-align: center; color: var(--color-text-muted); text-decoration: none; font-size: var(--font-size-sm); display: flex; flex-direction: column; align-items: center; padding: var(--space-xs); transition: color var(--transition-normal); } .nav-item i { font-size: 1.25rem; display: block; margin-bottom: 4px; } .nav-item.active { color: var(--color-primary); } /* ── 11. Avatars ──────────────────────────────────────── */ .avatar { border-radius: var(--radius-full); object-fit: cover; flex-shrink: 0; } .avatar-sm { width: 36px; height: 36px; } .avatar-md { width: 50px; height: 50px; } .avatar-lg { width: 60px; height: 60px; } .avatar-xl { width: 100px; height: 100px; } /* ── 12. Tags & Badges ────────────────────────────────── */ .tag { display: inline-flex; align-items: center; padding: 0.2rem 0.6rem; font-size: var(--font-size-xs); border-radius: var(--radius-full); background: var(--color-surface-hover); color: var(--color-text-secondary); text-decoration: none; border: 1px solid var(--color-border-light); transition: all var(--transition-normal); } .tag:hover { border-color: var(--color-primary); color: var(--color-text); } .tag-brand { background: var(--color-primary-light); color: var(--color-primary); border-color: rgba(94,106,210,0.2); } .badge { display: inline-flex; align-items: center; gap: 2px; padding: 0.15rem 0.45rem; font-size: var(--font-size-xs); border-radius: var(--radius-sm); white-space: nowrap; background: var(--color-surface-hover); color: var(--color-text-muted); } /* ── 13. Star Rating ──────────────────────────────────── */ .stars { display: inline-flex; align-items: center; gap: 2px; color: var(--color-star); font-size: var(--font-size-sm); } .stars .value { color: var(--color-text-muted); font-weight: var(--font-weight-medium); margin-left: 4px; } /* ── 14. Time Slots ───────────────────────────────────── */ .time-slots { display: flex; flex-wrap: wrap; gap: var(--space-sm); } .time-slot { padding: 0.5rem 0.75rem; border: 1px solid var(--color-border); border-radius: var(--radius-md); font-size: var(--font-size-sm); cursor: pointer; transition: all var(--transition-normal); background: var(--color-surface); color: var(--color-text-secondary); min-height: 40px; display: inline-flex; align-items: center; } .time-slot:hover { background: var(--color-surface-hover); border-color: var(--color-primary); color: var(--color-text); } .time-slot.selected { background: var(--color-primary); color: #ffffff; border-color: var(--color-primary); } /* ── 15. Empty States ─────────────────────────────────── */ .empty-state { text-align: center; padding: var(--space-3xl) var(--space-lg); border-radius: var(--radius-lg); background: var(--color-surface); border: 1px solid var(--color-border); } .empty-state-icon { font-size: 2.5rem; color: var(--color-text-muted); margin-bottom: var(--space-lg); } .empty-state-text { color: var(--color-text-muted); font-size: var(--font-size-md); } .empty-state-text .keyword { color: var(--color-primary); font-weight: var(--font-weight-medium); } /* ── 16. Auth Pages (dark-adapted) ────────────────────── */ .auth-page { background: var(--color-bg); min-height: 100vh; display: flex; align-items: center; justify-content: center; margin: 0; padding: 16px; } .auth-container { background: var(--color-bg-elevated); border: 1px solid var(--color-border); width: 100%; padding: var(--space-3xl); border-radius: var(--radius-xl); } .auth-container.sm { max-width: 400px; } .auth-container.md { max-width: 480px; } .auth-container.lg { max-width: 560px; } .auth-title { text-align: center; margin-bottom: var(--space-2xl); color: var(--color-text); font-size: var(--font-size-xl); font-weight: var(--font-weight-semibold); } .auth-icon { font-size: 40px; color: var(--color-primary); margin-bottom: 12px; } /* ── 17. Modals ───────────────────────────────────────── */ .modal-content { background: var(--color-bg-elevated) !important; border: 1px solid var(--color-border) !important; border-radius: var(--radius-xl) !important; } .modal-header { border-bottom: 1px solid var(--color-border-light) !important; } .modal-footer { border-top: 1px solid var(--color-border-light) !important; } .modal-header-gradient { border-bottom: none !important; padding: 1.25rem 1.5rem; background: var(--color-primary-gradient-h); color: #ffffff; border-radius: var(--radius-xl) var(--radius-xl) 0 0; } .modal-header-gradient .btn-close { filter: brightness(0) invert(1); } /* ── 18. Dashboard Stats ──────────────────────────────── */ .stats-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(160px, 1fr)); gap: var(--space-lg); margin-bottom: var(--space-2xl); } .stat-card { background: var(--color-surface); border: 1px solid var(--color-border); border-radius: var(--radius-lg); padding: var(--space-2xl); position: relative; overflow: hidden; } .stat-card::before { content: ''; position: absolute; top: 0; left: 0; right: 0; height: 3px; } .stat-card.primary::before { background: var(--color-primary-gradient-h); } .stat-card.warning::before { background: linear-gradient(90deg, #f6d365, #fda085); } .stat-card.success::before { background: linear-gradient(90deg, #27a644, #10b981); } .stat-value { font-size: var(--font-size-xl); font-weight: var(--font-weight-semibold); color: var(--color-text); } .stat-label { color: var(--color-text-muted); font-size: var(--font-size-sm); margin-top: var(--space-xs); } /* ── 19. Teacher Content Layout ───────────────────────── */ .teacher-content { margin-top: var(--topbar-height); padding: var(--space-2xl); min-height: calc(100vh - var(--topbar-height)); } @media (min-width: 992px) { .teacher-content { margin-left: var(--sidebar-width); } } /* ── 20. Profile Section ──────────────────────────────── */ .profile-header { display: flex; align-items: center; gap: var(--space-lg); } .profile-header-body { flex: 1; } .profile-name { font-size: var(--font-size-lg); font-weight: var(--font-weight-semibold); color: var(--color-text); margin-bottom: var(--space-xs); } .profile-meta { color: var(--color-text-muted); font-size: var(--font-size-base); } .profile-stats { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--space-sm); margin-top: var(--space-2xl); padding: var(--space-lg); background: rgba(255,255,255,0.02); border: 1px solid var(--color-border-light); border-radius: var(--radius-lg); } .profile-stat-value { font-size: var(--font-size-lg); font-weight: var(--font-weight-semibold); color: var(--color-text); } .profile-stat-label { font-size: var(--font-size-xs); color: var(--color-text-muted); } /* ── 21. Toast Notifications ──────────────────────────── */ .toast-container { position: fixed; top: var(--space-lg); right: var(--space-lg); z-index: var(--z-toast); display: flex; flex-direction: column; gap: var(--space-sm); pointer-events: none; } .toast { padding: var(--space-md) var(--space-lg); border-radius: var(--radius-md); background: var(--color-bg-elevated); border: 1px solid var(--color-border); box-shadow: var(--shadow-lg); font-size: var(--font-size-sm); color: var(--color-text-secondary); pointer-events: auto; animation: toast-in var(--transition-slow) ease forwards; display: flex; align-items: center; gap: var(--space-sm); max-width: 360px; } .toast.success { border-left: 3px solid var(--color-success); } .toast.error { border-left: 3px solid var(--color-danger); } .toast.info { border-left: 3px solid var(--color-primary); } .toast.fade-out { animation: toast-out var(--transition-normal) ease forwards; } @keyframes toast-in { from { opacity: 0; transform: translateX(16px); } to { opacity: 1; transform: translateX(0); } } @keyframes toast-out { from { opacity: 1; transform: translateX(0); } to { opacity: 0; transform: translateX(16px); } } /* ── 22. Skeleton Loader ──────────────────────────────── */ .skeleton { background: linear-gradient(90deg, rgba(255,255,255,0.03) 25%, rgba(255,255,255,0.06) 50%, rgba(255,255,255,0.03) 75%); background-size: 200% 100%; animation: skeleton-wave 1.5s ease-in-out infinite; border-radius: var(--radius-sm); } .skeleton-text { height: 14px; margin-bottom: var(--space-sm); } .skeleton-text.short { width: 60%; } .skeleton-avatar { width: 50px; height: 50px; border-radius: var(--radius-full); } .skeleton-card { height: 80px; margin-bottom: var(--space-md); } @keyframes skeleton-wave { 0% { background-position: 200% 0; } 100% { background-position: -200% 0; } } /* ── 23. Page Transition ──────────────────────────────── */ @media (prefers-reduced-motion: no-preference) { ::view-transition-old(root) { animation: 0.15s ease both fade-out; } ::view-transition-new(root) { animation: 0.2s ease both fade-in-up; } } @keyframes fade-out { to { opacity: 0; } } @keyframes fade-in-up { from { opacity: 0; transform: translateY(8px); } to { opacity: 1; transform: translateY(0); } } /* ── 24. Utility Classes ──────────────────────────────── */ .gap-xs { gap: var(--space-xs); } .gap-sm { gap: var(--space-sm); } .gap-md { gap: var(--space-md); } .gap-lg { gap: var(--space-lg); } .d-flex { display: flex; } .flex-col { flex-direction: column; } .flex-wrap { flex-wrap: wrap; } .items-center { align-items: center; } .justify-between { justify-content: space-between; } .justify-center { justify-content: center; } .flex-1 { flex: 1; } .flex-shrink-0 { flex-shrink: 0; } .min-w-0 { min-width: 0; } .mt-0 { margin-top: 0; } .mt-sm { margin-top: var(--space-sm); } .mt-md { margin-top: var(--space-md); } .mt-lg { margin-top: var(--space-lg); } .mb-sm { margin-bottom: var(--space-sm); } .mb-md { margin-bottom: var(--space-md); } .mb-lg { margin-bottom: var(--space-lg); } .text-center { text-align: center; } .text-left { text-align: left; } .w-full { width: 100%; } .h-full { height: 100%; } .relative { position: relative; } .overflow-hidden { overflow: hidden; } .cursor-pointer { cursor: pointer; } /* ── 25. Responsive Utilities ─────────────────────────── */ .hide-mobile { display: none; } @media (min-width: 768px) { .hide-mobile { display: initial; } .hide-desktop { display: none; } } /* ── 26. Image Utilities ──────────────────────────────── */ .img-thumb { object-fit: cover; border-radius: var(--radius-sm); } .img-cover { width: 100%; height: 100%; object-fit: cover; } /* ── 27. Swiper Overrides ─────────────────────────────── */ .swiper { width: 100%; } .banner-slide { height: 180px; } .banner-slide img { width: 100%; height: 100%; object-fit: cover; border-radius: var(--radius-sm); } .swiper-pagination-bullet { background: var(--color-text-muted); opacity: 0.5; } .swiper-pagination-bullet-active { background: var(--color-primary); opacity: 1; } @media (min-width: 768px) { .banner-slide { height: 300px; } } /* ── 28. Block Link Cards (profile menu, etc.) ────────── */ .link-card { display: flex; align-items: center; justify-content: space-between; padding: var(--space-lg); background: var(--color-surface); border: 1px solid var(--color-border-light); border-radius: var(--radius-lg); color: var(--color-text-secondary); text-decoration: none; transition: all var(--transition-normal); margin-bottom: var(--space-sm); } .link-card:hover { border-color: var(--color-primary); background: var(--color-surface-hover); color: var(--color-text); } .link-card i.bi-chevron-right { color: var(--color-text-muted); }