/* ===== Design Tokens ===== */
:root{
    --bg: #0b0d16;          /* sehr dunkles Blau */
    --card: #12162a;        /* Karten-Hintergrund */
    --ink: #e8ecff;         /* Text auf dunkel */
    --muted: #b7c0ff;       /* Sekundärtext */
    --brand: #8a5cf6;       /* Lila */
    --brand-2: #ff4fd8;     /* Pink */
    --accent: #4df0ff;      /* Türkis */
    --shadow: 0 10px 30px rgba(0,0,0,.35);
    --radius: 18px;
    --glass-1: rgba(255,255,255,.04);
    --glass-2: rgba(255,255,255,.06);
    --glass-3: rgba(255,255,255,.08);
    --border-1: rgba(255,255,255,.06);
    --border-2: rgba(255,255,255,.08);
    --border-3: rgba(255,255,255,.10);
    --border-4: rgba(255,255,255,.12);
    --border-5: rgba(255,255,255,.14);
}

/* ===== Base / Reset ===== */
*,*::before,*::after{box-sizing:border-box}
html,body{height:100%}
body{
    margin:0;
    font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Ubuntu, Cantarell, Noto Sans, "Helvetica Neue", Arial, "Apple Color Emoji", "Segoe UI Emoji";
    color:var(--ink);
    background:
            radial-gradient(1200px 700px at 10% 0%, rgba(138,92,246,.25), transparent),
            radial-gradient(900px 600px at 100% 20%, rgba(255,79,216,.15), transparent),
            linear-gradient(180deg, var(--bg) 0%, var(--bg) 100%);
    background-attachment:fixed;
}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
.container{max-width:1120px;margin:0 auto;padding:0 16px}

:focus-visible{outline:2px solid var(--accent);outline-offset:2px}

@media (prefers-reduced-motion: reduce){*,*::before,*::after{animation:none!important;transition:none!important;scroll-behavior:auto!important}}

/* ===== Navbar ===== */
.nav{position:sticky;top:0;z-index:20;backdrop-filter:saturate(140%) blur(10px);background:rgba(11,13,22,.5);border-bottom:1px solid var(--border-1)}
.nav__row{display:flex;align-items:center;justify-content:space-between;height:64px}
.brand{display:flex;align-items:center;gap:10px;font-weight:800;letter-spacing:.4px}
.brand__logo{height:36px;width:36px;border-radius:12px;background:linear-gradient(135deg,var(--brand),var(--brand-2));box-shadow:0 0 24px rgba(138,92,246,.55)}
.nav__links{display:flex;gap:24px}
.nav__link{opacity:.9}
.nav__link:hover{opacity:1;color:var(--accent)}
.nav__cta{padding:10px 14px;border-radius:14px;border:1px solid var(--border-5);background:var(--glass-3);box-shadow:var(--shadow)}
.burger{display:none;cursor:pointer;border:none;background:transparent;padding:8px}
.burger span{display:block;width:26px;height:2px;background:#fff;margin:6px 0}

@media (max-width:860px){.nav__links{display:none}.burger{display:block}.mobile{display:block}}
.mobile{display:none;border-top:1px solid var(--border-1);background:rgba(11,13,22,.8)}
.mobile a{display:block;padding:12px 4px;border-bottom:1px solid var(--border-1)}

/* ===== Hero ===== */
.hero{padding:72px 0}
.tag{display:inline-flex;align-items:center;gap:8px;font-size:12px;padding:6px 10px;border-radius:999px;border:1px solid var(--border-5);background:var(--glass-3)}
.h1{font-size:clamp(28px,6vw,52px);margin:16px 0 10px;font-weight:900;line-height:1.05}
.lead{color:var(--muted);max-width:56ch;margin-top:2rem}
.cta-row{display:flex;gap:14px;flex-wrap:wrap;margin-top:18px}

.btn{display:inline-flex;align-items:center;gap:10px;padding:12px 18px;border-radius:16px;font-weight:700;border:1px solid transparent;color:var(--ink)}
.btn--primary{background:linear-gradient(135deg,var(--brand),var(--brand-2));box-shadow:0 10px 25px rgba(138,92,246,.35)}
.btn--ghost{background:var(--glass-3);border-color:var(--border-4)}
.btn[disabled], .nav__cta.disabled{pointer-events:none;opacity:.6;cursor:not-allowed}

.hero__grid{display:grid;grid-template-columns:1.1fr .9fr;gap:22px;margin-top:30px}
@media (max-width:860px){.hero__grid{grid-template-columns:1fr}}

.card{background:var(--card);border:1px solid var(--border-1);border-radius:var(--radius);padding:18px;box-shadow:var(--shadow)}
.card h3{margin:6px 0 4px}
.pill{display:inline-block;font-size:11px;opacity:.9;padding:4px 10px;border-radius:999px;border:1px solid var(--border-2);background:var(--glass-1)}

.tracks{display:grid;grid-template-columns:1fr 1fr;gap:14px}
@media (max-width:520px){.tracks{grid-template-columns:1fr}}

section{padding:48px 0}
main.section.container > section{padding:28px 0}
main.section.container > section:first-of-type{padding-top:16px}
main.section.container > section:last-of-type{padding-bottom:16px}
main.section.container > section > *:last-child{margin-bottom:0}
main.section.container h2{margin:0 0 .6rem}

.task{padding:18px;border-radius:16px;background:linear-gradient(180deg,var(--glass-3),var(--glass-1));border:1px solid var(--border-3)}
.task small{color:var(--muted)}
.sheet{padding:18px;border-radius:16px;background:var(--card);border:1px solid var(--border-2)}

footer{padding:30px 0;border-top:1px solid var(--border-1);color:#c9d1ffb3}

.dialog{position:fixed;inset:0;display:none;align-items:center;justify-content:center;background:rgba(0,0,0,.55)}
.dialog[open]{display:flex}
.dialog__card{width:min(92vw,420px);background:var(--card);border:1px solid var(--border-2);border-radius:18px;box-shadow:var(--shadow);padding:22px}
.dialog h3{margin:0 0 12px}
.input{width:100%;padding:12px 14px;border-radius:12px;border:1px solid var(--border-5);background:var(--glass-3);color:var(--ink)}
.row{display:flex;gap:10px}

.hero .container{padding-top:4rem;padding-bottom:4rem}
form#loginForm{display:flex;flex-direction:column;gap:1.2rem;margin-top:1.5rem}
.row{margin-top:.8rem;margin-bottom:1.2rem}
.btn.btn--primary{margin-top:1.2rem}

.level-card{display:flex;flex-direction:column;align-items:center}
.circle-container{position:relative;width:120px;height:120px}
.exp-circle{transform:rotate(-90deg)}
.exp-circle .bg{stroke:#ddd}
.exp-circle .progress{stroke:var(--brand);stroke-linecap:round;transition:stroke-dashoffset .5s ease}
.level-text{position:absolute;inset:50% auto auto 50%;transform:translate(-50%,-50%);font-size:1.8rem;font-weight:700}

.wrap.sandbox{display:grid;grid-template-columns:320px 1fr;height:calc(100vh - 64px);gap:0}
.sandbox .sidebar{background:linear-gradient(180deg,var(--glass-1),rgba(255,255,255,.02));border-right:1px solid var(--border-1);padding:14px;overflow:auto}
.sandbox .sidebar h3{margin:6px 0 12px;color:var(--ink)}
.sandbox .task{display:flex;flex-direction:column;gap:4px;padding:10px 12px;border-radius:12px;background:linear-gradient(180deg,var(--glass-3),var(--glass-1));border:1px solid var(--border-3);transition:transform .06s ease,border-color .15s ease,box-shadow .15s ease;box-shadow:0 4px 16px rgba(0,0,0,.25)}
.sandbox .task+.task{margin-top:10px}
.sandbox .task:hover{border-color:rgba(255,255,255,.18);transform:translateY(-1px)}
.sandbox .task.active{border-color:var(--accent);background:linear-gradient(135deg,rgba(77,240,255,.2),var(--glass-1));box-shadow:0 8px 24px rgba(77,240,255,.18)}

.sandbox .main{display:grid;grid-template-rows:auto 1fr auto auto;background:var(--card)}
.sandbox .meta{padding:12px 16px;border-bottom:1px solid var(--border-1)}
.sandbox .meta .small{color:var(--muted)}

#editor{height:48vh;border-bottom:1px solid var(--border-1);background:var(--card)}
#editor .cm-editor{height:100%;background:var(--card);color:var(--ink);font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,"Liberation Mono",monospace;box-shadow:inset 0 0 0 1px var(--border-1);border-radius:12px 12px 0 0}
#editor .cm-gutters{background:var(--card);color:var(--muted);border-right:1px solid var(--border-1)}
#editor .cm-selectionBackground{background:rgba(77,240,255,.28)!important}
#editor .cm-activeLine{background:var(--glass-1)}
#editor .cm-cursor{border-left:2px solid var(--ink)}

#console{padding:12px 16px;height:calc(100vh - 64px - 48vh - 66px - 60px);min-height:180px;overflow:auto;background:#0b1020;color:#e9f1ff;border-top:1px solid var(--border-1);border-radius:0 0 12px 12px;box-shadow:inset 0 0 0 1px var(--border-1);font:14px/1.45 ui-monospace,SFMono-Regular,Menlo,Consolas,"Liberation Mono",monospace}
#console b,.ok{color:var(--accent)}
#console .err{color:var(--brand-2)}

@media (max-width:900px){.wrap.sandbox{grid-template-columns:1fr}.sandbox .sidebar{border-right:0;border-bottom:1px solid var(--border-1)}#editor{height:42vh}}

::-webkit-scrollbar{width:10px;height:10px}
::-webkit-scrollbar-thumb{background:linear-gradient(180deg,var(--brand),var(--brand-2));border-radius:999px}
::-webkit-scrollbar-track{background:var(--glass-2);border-radius:999px}

footer a{color:var(--accent)}
footer a:hover{color:var(--brand-2)}

/* ===== Editor Add-ons ===== */
#editor .cm-content{caret-color:var(--ink)}
#editor .cm-tooltip{background:rgba(18,22,42,.98);border:1px solid var(--border-2);color:var(--ink)}

/* Scrollbars (editor & console specific) */
#editor .cm-scroller::-webkit-scrollbar, #console::-webkit-scrollbar{width:10px;height:10px}
#editor .cm-scroller::-webkit-scrollbar-thumb, #console::-webkit-scrollbar-thumb{background:linear-gradient(180deg,var(--brand),var(--brand-2));border-radius:999px}
#editor .cm-scroller::-webkit-scrollbar-track, #console::-webkit-scrollbar-track{background:var(--glass-2);border-radius:999px}

/* ===== Runbar + Buttons ===== */
.runbar{display:flex;align-items:center;gap:10px;padding:10px 16px;border-bottom:1px solid var(--border-1);background:linear-gradient(180deg,var(--glass-1),rgba(255,255,255,.02))}
.runbar button{appearance:none;border:none;padding:10px 14px;border-radius:14px;font-weight:700;letter-spacing:.2px;color:var(--ink);background:linear-gradient(135deg,var(--brand),var(--brand-2));box-shadow:0 10px 24px rgba(0,0,0,.35);transition:transform .06s ease,box-shadow .15s ease,filter .15s ease}
.runbar button:hover{transform:translateY(-1px);filter:saturate(115%)}
.runbar button:active{transform:translateY(0)}
.runbar #saveBtn{background:var(--glass-3);border:1px solid var(--border-5);box-shadow:none}
.runbar #resetBtn{background:var(--glass-2);border:1px solid var(--border-4);box-shadow:none}
.runbar .small{font-size:12px;color:var(--muted)}
.runbar input[type="checkbox"]{width:16px;height:16px;vertical-align:-3px;accent-color:var(--accent)}

/* ===== Console (primary) ===== */
#console{padding:12px 16px;height:calc(100vh - 64px - 48vh - 66px - 60px);min-height:180px;overflow:auto;background:#0b1020;color:#e9f1ff;border-top:1px solid var(--border-1);border-radius:0 0 12px 12px;box-shadow:inset 0 0 0 1px var(--border-1);font:14px/1.45 ui-monospace,SFMono-Regular,Menlo,Consolas,"Liberation Mono",monospace}
#console b,.ok{color:var(--accent)}
#console .err{color:var(--brand-2)}

/* ===== Sandbox (cards-based variant) ===== */
.sandbox-card,.sandbox-workspace{background:var(--card);border:1px solid var(--border-2);border-radius:var(--radius);box-shadow:var(--shadow)}

.sandbox-tasklist{display:grid;gap:10px;margin-top:10px}
.sandbox-tasklist .task{padding:12px;border-radius:12px;background:linear-gradient(180deg,var(--glass-3),var(--glass-1));border:1px solid var(--border-3);cursor:pointer;transition:transform .06s ease,border-color .15s ease,box-shadow .15s ease}
.sandbox-tasklist .task:hover{border-color:rgba(255,255,255,.18);transform:translateY(-1px)}
.sandbox-tasklist .task.active{border-color:var(--accent);background:linear-gradient(135deg,rgba(77,240,255,.20),var(--glass-1));box-shadow:0 8px 24px rgba(77,240,255,.18)}

.sandbox-meta{padding:12px 14px;border-bottom:1px solid var(--border-1)}
.sandbox-editor{height:48vh;border-bottom:1px solid var(--border-1);background:var(--card);border-radius:12px 12px 0 0;overflow:hidden}
.sandbox-editor .cm-editor{height:100%;background:var(--card);color:var(--ink)}
.sandbox-editor .cm-scroller{height:100%}
.sandbox-editor .cm-gutters{background:var(--card);color:var(--muted);border-right:1px solid var(--border-1)}
.sandbox-editor .cm-content{caret-color:var(--ink)}
.sandbox-editor .cm-selectionBackground{background:rgba(77,240,255,.28)!important}
.sandbox-editor .cm-activeLine{background:var(--glass-1)}
.sandbox-editor .cm-cursor{border-left:2px solid var(--ink)}

.sandbox-runbar{display:flex;gap:10px;align-items:center;padding:10px 14px;border-bottom:1px solid var(--border-1);background:linear-gradient(180deg,var(--glass-1),rgba(255,255,255,.02))}
.sandbox-runbar button{border:none;padding:10px 14px;border-radius:14px;font-weight:700;letter-spacing:.2px;color:var(--ink);background:linear-gradient(135deg,var(--brand),var(--brand-2));box-shadow:0 10px 24px rgba(0,0,0,.35);transition:transform .06s ease,filter .15s ease,box-shadow .15s ease}
.sandbox-runbar button:hover{transform:translateY(-1px);filter:saturate(115%)}
.sandbox-runbar button:active{transform:translateY(0)}
.sandbox-runbar #saveBtn{background:var(--glass-3);border:1px solid var(--border-5);box-shadow:none}
.sandbox-runbar #resetBtn{background:var(--glass-2);border:1px solid var(--border-4);box-shadow:none}
.sandbox-runbar .small{font-size:12px;color:var(--muted)}
.sandbox-runbar input[type="checkbox"]{accent-color:var(--accent)}
.flex-1{flex:1}

.sandbox-console{padding:12px 14px;min-height:180px;max-height:38vh;overflow:auto;background:#0b1020;color:#e9f1ff;font:14px/1.45 ui-monospace,SFMono-Regular,Menlo,Consolas,"Liberation Mono",monospace;border-top:1px solid var(--border-1);border-radius:0 0 12px 12px;box-shadow:inset 0 0 0 1px var(--border-1);white-space:pre-wrap}

/* Scrollbars (cards variant) */
.sandbox-editor .cm-scroller::-webkit-scrollbar,.sandbox-console::-webkit-scrollbar{width:10px;height:10px}
.sandbox-editor .cm-scroller::-webkit-scrollbar-thumb,.sandbox-console::-webkit-scrollbar-thumb{background:linear-gradient(180deg,var(--brand),var(--brand-2));border-radius:999px}
.sandbox-editor .cm-scroller::-webkit-scrollbar-track,.sandbox-console::-webkit-scrollbar-track{background:var(--glass-2);border-radius:999px}

@media (max-width:900px){
    .grid.cols-3{grid-template-columns:1fr!important}
    .sandbox-editor{height:42vh}
}

/* ===== Java Sandbox (compact) ===== */
.sandbox-grid{display:grid;gap:16px;grid-template-columns:280px 1fr;align-items:start}
.sandbox-sidebar{display:flex;flex-direction:column;gap:10px}
.sandbox-select{width:100%}
.sandbox-desc{min-height:3em}
.sandbox-settings{border-top:1px solid var(--border-1);padding-top:10px;margin-top:8px}
.sandbox-workspace{display:flex;flex-direction:column;gap:12px}
.sandbox-bar{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:.5rem}
.sandbox-title{font-weight:600}

/* Textareas / Inputs (unified) */
.sandbox-textarea,.sandbox-input{
    width:100%;
    background:#1e1e1e;
    color:#cdd9e5;
    border:1px solid #30363d;
    border-radius:8px;
    padding:10px;
    font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,"Liberation Mono",monospace;
}
.sandbox-textarea{height:320px;resize:vertical;font-size:13px}
.sandbox-input{height:60px;resize:vertical;margin:.5rem 0}

/* Secondary console (lightweight) */
.sandbox-console--lite{background:#111;color:#9fe89f;padding:10px;min-height:80px;border-radius:8px;margin-top:8px;white-space:pre-wrap;font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,"Liberation Mono",monospace}

/* Utility buttons */
.btn-primary{background:var(--accent);color:#04162b;border-color:var(--accent);font-weight:600}
.btn-secondary{background:#333;color:#fff}
.btn-primary:hover{filter:saturate(115%)}
.btn-secondary:hover{filter:brightness(1.1)}

/* Language toggle */
.lang-toggle{position:relative;display:flex;align-items:center;margin-left:20px}
.lang-toggle input{display:none}
.lang-toggle label{display:flex;align-items:center;background:var(--glass-3);border:1px solid var(--border-4);border-radius:999px;cursor:pointer;padding:4px;position:relative;font-size:13px;color:var(--ink);box-shadow:var(--shadow);transition:all .25s ease}
.lang-toggle .lang{padding:6px 12px;opacity:.6;transition:opacity .25s ease}
.lang-toggle .toggle{position:absolute;top:3px;left:3px;width:calc(50% - 6px);height:calc(100% - 6px);background:linear-gradient(135deg,var(--brand),var(--brand-2));border-radius:999px;z-index:0;transition:transform .25s ease}
.lang-toggle input:checked+label .toggle{transform:translateX(100%)}
.lang-toggle input:checked+label .lang--right{opacity:1}
.lang-toggle input:not(:checked)+label .lang--left{opacity:1}

/* ===== Section spacing overrides (content pages like Fakultät) ===== */
/* Keep global section spacing for landing pages, but make content pages tighter. */
main.section.container > section{padding:28px 0}
main.section.container > section:first-of-type{padding-top:16px}
main.section.container > section:last-of-type{padding-bottom:16px}
/* Avoid extra whitespace from child element margins */
main.section.container > section > *:last-child{margin-bottom:0}
/* Tighter headings inside content pages */
main.section.container h2{margin:0 0 .6rem}
/* Sandbox block spacing within content flow */
main.section.container .sandbox{margin:16px 0}

@media (max-width:640px){
    main.section.container > section{padding:20px 0}
}