/* ═══════════════════════════════════════════════════════════════ FEYNOTES — Design System v2 Single source of truth. Theme via data-theme on . ═══════════════════════════════════════════════════════════════ */ /* ─── Fonts ─── */ @import url('https://fonts.googleapis.com/css2?family=JetBrains+Mono:wght@400;500;700&family=Outfit:wght@300;400;500;600;700;800&display=swap'); /* ─── Base variables (dark theme, neutral accent) ─── */ :root { /* Backgrounds */ --bg-primary: #0b0d14; --bg-secondary: #12141e; --bg-tertiary: #181b28; --bg-card: #1a1d2c; --bg-hover: #22263a; /* Borders */ --border: #262a42; --border-light: #31365a; /* Text */ --text-primary: #e4e7f0; --text-secondary: #9ca1ba; --text-muted: #5f6580; /* Accent — overridden by data-theme */ --accent: #8b8b8b; --accent-dim: #6b6b6b; --accent-glow: rgba(139,139,139,0.12); --accent-glow-strong: rgba(139,139,139,0.25); --header-bg: rgba(11, 13, 20, 0.85); --teal: #63e6be; --teal-dim: rgba(99,230,190,0.10); /* Semantic colors (always available) */ --gold: #f0c050; --gold-dim: rgba(240,192,80,0.10); --red: #ff6b6b; --red-dim: rgba(255,107,107,0.10); --green: #51cf66; --green-dim: rgba(81,207,102,0.10); --orange: #ffa94d; --orange-dim: rgba(255,169,77,0.10); --purple: #b197fc; --purple-dim: rgba(177,151,252,0.10); --blue: #74c0fc; --blue-dim: rgba(116,192,252,0.10); --teal: #63e6be; --teal-dim: rgba(99,230,190,0.10); /* Layout */ --max-width: 960px; --header-h: 52px; --radius: 10px; --radius-sm: 6px; --radius-lg: 14px; --sidebar-w: 260px; /* Typography */ --font-body: 'Outfit', system-ui, -apple-system, sans-serif; --font-mono: 'JetBrains Mono', 'Fira Code', monospace; /* Motion */ --transition: 0.2s ease; --transition-fast: 0.15s ease; } /* ═══════════════════════════════════════════════════════════════ THEME OVERRIDES Usage: ═══════════════════════════════════════════════════════════════ */ [data-theme="fisica"] { --accent: #e8d44d; --accent-dim: #c4b030; --accent-glow: rgba(232,212,77,0.12); --accent-glow-strong: rgba(232,212,77,0.25); } [data-theme="geometria"] { --accent: #ff8c42; --accent-dim: #d4702e; --accent-glow: rgba(255,140,66,0.12); --accent-glow-strong: rgba(255,140,66,0.25); } [data-theme="controlli"] { --accent: #ff6b6b; --accent-dim: #d44e4e; --accent-glow: rgba(255,107,107,0.12); --accent-glow-strong: rgba(255,107,107,0.25); } /* ═══════════════════════════════════════════════════════════════ RESET & BASE ═══════════════════════════════════════════════════════════════ */ *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; } html { font-size: 16px; scroll-behavior: smooth; } body { font-family: var(--font-body); background: var(--bg-primary); color: var(--text-primary); line-height: 1.72; min-height: 100vh; -webkit-font-smoothing: antialiased; -moz-osx-font-smoothing: grayscale; } ::selection { background: var(--accent); color: var(--bg-primary); } ::-webkit-scrollbar { width: 5px; } ::-webkit-scrollbar-track { background: transparent; } ::-webkit-scrollbar-thumb { background: var(--border-light); border-radius: 3px; } ::-webkit-scrollbar-thumb:hover { background: var(--text-muted); } a { color: var(--accent); text-decoration: none; transition: color var(--transition); } a:hover { color: var(--text-primary); } /* ═══════════════════════════════════════════════════════════════ HEADER — Shared across all pages ═══════════════════════════════════════════════════════════════ */ #site-header { position: fixed; top: 0; left: 0; right: 0; height: var(--header-h); background: rgba(11, 13, 20, 0.88); backdrop-filter: blur(16px); -webkit-backdrop-filter: blur(16px); border-bottom: 1px solid var(--border); display: flex; align-items: center; padding: 0 24px; z-index: 200; gap: 0; } /* FeyNotes home link in header */ .header-home { font-family: var(--font-mono); font-size: 0.85rem; font-weight: 500; color: var(--text-secondary) !important; text-decoration: none; display: flex; align-items: center; transition: color var(--transition); } .header-home:hover { color: var(--text-primary) !important; } .header-home-accent { color: var(--accent); } /* Blinking cursor */ .header-cursor { display: none; display: inline-block; width: 1.5px; height: 14px; background: var(--accent); margin-left: 2px; vertical-align: middle; animation: cursorBlink 1s step-end infinite; } @keyframes cursorBlink { 0%, 100% { opacity: 1; } 50% { opacity: 0; } } /* Breadcrumb separator */ .header-lesson { font-size: 0.85rem; font-weight: 500; color: var(--text-secondary); white-space: nowrap; } .header-sep { color: var(--border-light); font-size: 1rem; font-weight: 300; margin: 0 12px; user-select: none; } /* Course logo in header */ .header-logo { font-size: 1.05rem; font-weight: 700; color: var(--accent) !important; white-space: nowrap; letter-spacing: -0.3px; user-select: none; display: flex; align-items: center; gap: 8px; } .header-logo .logo-icon { font-size: 1.2rem; } .header-logo .logo-sub { color: var(--text-muted); font-weight: 400; font-size: 0.78rem; margin-left: 4px; } /* Header nav */ .header-nav { display: flex; gap: 2px; margin-left: auto; } .header-nav a { font-size: 0.82rem; color: var(--text-primary); padding: 6px 14px; border-radius: var(--radius-sm); transition: all var(--transition); font-weight: 500; } .header-nav a:hover { color: var(--text-secondary); background: var(--bg-hover); } .header-nav a.active { color: var(--accent); background: var(--accent-glow); } /* ═══════════════════════════════════════════════════════════════ SHARED CONTAINER ═══════════════════════════════════════════════════════════════ */ .fn-container { max-width: var(--max-width); margin: 0 auto; padding: 0 24px; } /* ═══════════════════════════════════════════════════════════════ TERMINAL STYLE ELEMENTS — // labels, $ commands, cursor ═══════════════════════════════════════════════════════════════ */ .fn-label { font-family: var(--font-mono); font-size: 0.72rem; color: var(--text-primary); font-weight: 700; letter-spacing: 2px; text-transform: uppercase; margin-bottom: 16px; } .fn-cmd { font-family: var(--font-mono); font-size: 0.82rem; color: var(--text-primary); font-weight: 700; margin-bottom: 10px; } .fn-cmd .prompt { color: var(--accent); } .fn-cursor { display: inline-block; width: 2px; height: 28px; background: var(--accent); margin-left: 4px; vertical-align: text-bottom; animation: cursorBlink 1s step-end infinite; } /* ═══════════════════════════════════════════════════════════════ HOMEPAGE — Hero, About, Course Grid ═══════════════════════════════════════════════════════════════ */ /* Hero */ .fn-hero { padding: 80px 0 64px; } .fn-hero h1 { font-size: 2.4rem; font-weight: 700; color: var(--text-primary); letter-spacing: -1px; margin-bottom: 8px; } .fn-hero-sub { font-size: 0.95rem; color: var(--text-muted); max-width: 600px; } /* About */ .fn-about { padding: 0 0 64px; } .fn-about-content { border-left: 2px solid var(--border); padding-left: 24px; } .fn-about-text { font-size: 0.88rem; color: var(--text-secondary); line-height: 1.9; max-width: 720px; } .fn-about-text .hl { color: var(--text-primary); font-weight: 600; } .fn-about-text a.hl { text-decoration: none; color: var(--text-primary); font-weight: 600; border-bottom: 1px dashed var(--border-light); transition: border-color var(--transition-fast); } .fn-about-text a.hl:hover { border-bottom-style: solid; border-color: var(--text-primary); } .fn-about-block { margin-bottom: 28px; } .fn-about-block:last-child { margin-bottom: 0; } .fn-about-features { display: flex; gap: 32px; margin-top: 24px; padding-top: 20px; border-top: 1px solid var(--border); } .fn-about-feature { font-family: var(--font-mono); font-size: 0.7rem; color: var(--text-muted); display: flex; align-items: center; gap: 8px; } .fn-about-feature-dot { width: 6px; height: 6px; border-radius: 50%; background: var(--accent-dim); } /* ═══════════════════════════════════════════════════════════════ COURSE CARDS (homepage grid) ═══════════════════════════════════════════════════════════════ */ .fn-courses { padding: 0 0 80px; } .fn-courses-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 12px; } .fn-course-card { display: block; background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--radius); padding: 24px 20px; text-decoration: none; color: inherit; position: relative; overflow: hidden; transition: border-color 0.25s ease, background 0.25s ease, transform var(--transition-fast); } .fn-course-card:hover { border-color: var(--border-light); background: var(--bg-hover); transform: translateY(-2px); } .fn-course-card:hover .fn-course-glow { opacity: 1; } .fn-course-card:hover .fn-course-arrow { color: var(--accent); transform: translateX(4px); } .fn-course-glow { position: absolute; top: 0; left: 0; right: 0; height: 1px; background: linear-gradient(90deg, transparent, var(--accent-dim), transparent); opacity: 0; transition: opacity 0.25s ease; } .fn-course-icon { font-family: var(--font-mono); font-size: 0.82rem; color: var(--text-muted); font-style: italic; margin-bottom: 16px; } .fn-course-name { font-size: 1rem; font-weight: 600; color: var(--text-primary); margin-bottom: 4px; } .fn-course-prof { font-size: 0.72rem; color: var(--text-muted); margin-bottom: 16px; } .fn-course-meta { display: flex; justify-content: space-between; align-items: center; padding-top: 16px; border-top: 1px solid var(--border); } .fn-course-count { font-family: var(--font-mono); font-size: 0.72rem; color: var(--accent-dim); } .fn-course-arrow { font-size: 0.9rem; color: var(--text-muted); transition: color var(--transition-fast), transform var(--transition-fast); } .fn-course-badge { font-family: var(--font-mono); display: inline-block; font-size: 0.62rem; letter-spacing: 1px; text-transform: uppercase; padding: 2px 8px; border-radius: 4px; background: var(--bg-hover); color: var(--text-muted); } .fn-course-card--soon { opacity: 0.5; cursor: default; } .fn-course-card--soon:hover { transform: none; border-color: var(--border); background: var(--bg-card); } /* Per-course accent on homepage cards */ .fn-course-card[data-course="fisica"]:hover { --accent: #e8d44d; --accent-dim: #c4b030; } .fn-course-card[data-course="fisica"] .fn-course-count { color: #c4b030; } .fn-course-card[data-course="geometria"]:hover { --accent: #ff8c42; --accent-dim: #d4702e; } .fn-course-card[data-course="geometria"] .fn-course-count { color: #d4702e; } .fn-course-card[data-course="controlli"]:hover { --accent: #ff6b6b; --accent-dim: #d44e4e; } .fn-course-card[data-course="controlli"] .fn-course-count { color: #d44e4e; } /* ═══════════════════════════════════════════════════════════════ COURSE INDEX PAGE — Section headers, lesson cards ═══════════════════════════════════════════════════════════════ */ .fn-page { max-width: var(--max-width); margin: 0 auto; padding: 0 24px; padding-top: calc(var(--header-h) + 20px); } /* Course hero */ .fn-course-hero { padding: 60px 0 48px; } .fn-course-hero h1 { font-size: 2.2rem; font-weight: 700; color: var(--text-primary); letter-spacing: -1px; margin-bottom: 8px; } .fn-course-hero-sub { font-size: 0.95rem; color: var(--text-secondary); max-width: 600px; line-height: 1.7; } .fn-course-hero-meta { font-family: var(--font-mono); font-size: 0.75rem; color: var(--text-muted); margin-top: 16px; } .fn-course-hero-meta .hl { color: var(--accent); font-weight: 600; } .fn-course-badge-inline { font-family: var(--font-mono); display: inline-block; font-size: 0.68rem; letter-spacing: 1px; text-transform: uppercase; padding: 4px 12px; border-radius: var(--radius-sm); border: 1px solid var(--border); color: var(--text-muted); margin-bottom: 20px; } /* Section dividers */ .fn-section { padding: 0 0 48px; } .fn-section-label { font-family: var(--font-mono); font-size: 0.72rem; color: var(--text-primary); font-weight: 700; letter-spacing: 2px; text-transform: uppercase; margin-bottom: 20px; display: flex; align-items: center; gap: 16px; } .fn-section-label::after { content: ''; flex: 1; height: 1px; background: var(--border); } /* Lesson cards */ .fn-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: 12px; } .fn-card { display: block; background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--radius); padding: 24px 20px; text-decoration: none; color: inherit; position: relative; overflow: hidden; transition: border-color 0.25s ease, background 0.25s ease, transform var(--transition-fast); } .fn-card:hover { border-color: var(--border-light); background: var(--bg-hover); transform: translateY(-2px); } .fn-card:hover .fn-card-glow { opacity: 1; } .fn-card:hover .fn-card-arrow { color: var(--accent); transform: translateX(4px); } .fn-card-glow { position: absolute; top: 0; left: 0; right: 0; height: 1px; background: linear-gradient(90deg, transparent, var(--accent-dim), transparent); opacity: 0; transition: opacity 0.25s ease; } .fn-card-num { font-family: var(--font-mono); font-size: 0.72rem; font-weight: 600; color: var(--accent); letter-spacing: 1px; text-transform: uppercase; margin-bottom: 10px; } .fn-card-title { font-size: 0.95rem; font-weight: 600; color: var(--text-primary); line-height: 1.4; margin-bottom: 8px; } .fn-card-abstract { font-size: 0.82rem; color: var(--text-secondary); line-height: 1.6; margin-bottom: 14px; } .fn-card-footer { display: flex; justify-content: space-between; align-items: center; padding-top: 12px; border-top: 1px solid var(--border); } .fn-card-date { font-family: var(--font-mono); font-size: 0.7rem; color: var(--text-muted); } .fn-card-arrow { font-size: 0.9rem; color: var(--text-muted); transition: color var(--transition-fast), transform var(--transition-fast); } .fn-card--placeholder { opacity: 0.4; cursor: default; } .fn-card--placeholder:hover { transform: none; border-color: var(--border); background: var(--bg-card); } /* ═══════════════════════════════════════════════════════════════ SHARED FOOTER ═══════════════════════════════════════════════════════════════ */ .fn-footer { border-top: 1px solid var(--border); padding: 24px 0; margin-top: 20px; } .fn-footer-coffee { text-align: center; padding: 0 0 20px; font-size: 0.82rem; color: var(--text-muted); } .fn-footer-coffee a { color: var(--gold) !important; text-decoration: none; font-weight: 500; } .fn-footer-coffee a:hover { color: #f5d070 !important; } .fn-footer-inner { display: flex; justify-content: space-between; align-items: center; } .fn-footer-copy { font-family: var(--font-mono); font-size: 0.72rem; color: var(--text-muted); } .fn-footer-links { display: flex; gap: 20px; } .fn-footer-links a { font-family: var(--font-mono); font-size: 0.72rem; color: var(--text-muted) !important; text-decoration: none; transition: color var(--transition); } .fn-footer-links a:hover { color: var(--text-secondary) !important; } /* ═══════════════════════════════════════════════════════════════ ANIMATIONS ═══════════════════════════════════════════════════════════════ */ .fn-fade { opacity: 0; transform: translateY(12px); animation: fnFadeIn 0.6s ease forwards; } .fn-d1 { animation-delay: 0.1s; } .fn-d2 { animation-delay: 0.2s; } .fn-d3 { animation-delay: 0.3s; } .fn-d4 { animation-delay: 0.4s; } .fn-d5 { animation-delay: 0.5s; } @keyframes fnFadeIn { to { opacity: 1; transform: translateY(0); } } /* ═══════════════════════════════════════════════════════════════ RESPONSIVE ═══════════════════════════════════════════════════════════════ */ @media (max-width: 600px) { .fn-hero h1, .fn-course-hero h1 { font-size: 1.8rem; } .fn-courses-grid, .fn-grid { grid-template-columns: 1fr; } .fn-about-features { flex-direction: column; gap: 12px; } .fn-footer-inner { flex-direction: column; gap: 12px; text-align: center; } .header-nav { gap: 0; } .header-nav a { padding: 6px 8px; font-size: 0.75rem; } } /* ═══════════════════════════════════════════════ TEMA CHIARO ═══════════════════════════════════════════════ */ [data-mode="light"] { --bg-primary: #f4f4f0; --bg-secondary: #eaeae5; --bg-tertiary: #e0e0db; --bg-card: #ffffff; --bg-hover: #e8e8e3; --border: #d1d1cc; --border-light: #c2c2bb; --text-primary: #2c2e3a; --text-secondary: #555770; --text-muted: #888a9e; --gold: #c99a20; --gold-dim: rgba(201,154,32,0.10); --red: #d94444; --red-dim: rgba(217,68,68,0.10); --green: #2ea043; --green-dim: rgba(46,160,67,0.10); --orange: #d98c30; --orange-dim: rgba(217,140,48,0.10); --purple: #8b6cc1; --purple-dim: rgba(139,108,193,0.10); --blue: #4a90c4; --blue-dim: rgba(74,144,196,0.10); --header-bg: rgba(244, 244, 240, 0.92); --teal: #2a9d8f; --teal-dim: rgba(42,157,143,0.10); } [data-mode="light"] #site-header { background: rgba(244,244,240,0.92); border-bottom-color: var(--border); --header-bg: rgba(244, 244, 240, 0.92); --teal: #2a9d8f; --teal-dim: rgba(42,157,143,0.10); } [data-mode="light"] .fn-card { box-shadow: 0 1px 3px rgba(0,0,0,0.08); --header-bg: rgba(244, 244, 240, 0.92); --teal: #2a9d8f; --teal-dim: rgba(42,157,143,0.10); } [data-mode="light"] .katex { color: var(--text-primary); --header-bg: rgba(244, 244, 240, 0.92); --teal: #2a9d8f; --teal-dim: rgba(42,157,143,0.10); } [data-mode="light"] ::selection { background: var(--accent); color: var(--text-primary); --header-bg: rgba(244, 244, 240, 0.92); --teal: #2a9d8f; --teal-dim: rgba(42,157,143,0.10); } [data-mode="light"] code, [data-mode="light"] pre { background: var(--bg-secondary); --header-bg: rgba(244, 244, 240, 0.92); --teal: #2a9d8f; --teal-dim: rgba(42,157,143,0.10); } .theme-toggle { background: none; border: 1px solid var(--border-light); border-radius: 6px; cursor: pointer; padding: 4px 8px; font-size: 0.85rem; color: var(--text-secondary); margin-left: auto; transition: all 0.2s ease; display: flex; align-items: center; gap: 4px; } .theme-toggle:hover { border-color: var(--accent); color: var(--accent); }