@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800;900&display=swap');
:root{--os-primary:#0F172A;--os-accent:#2563EB;--os-bg:#F8FAFC;--os-bg-white:#FFF;--os-text:#1E293B;--os-text-2:#475569;--os-text-3:#94A3B8;--os-border:#E2E8F0;--os-border-2:#CBD5E1;--os-radius:10px;--os-radius-lg:16px;--os-radius-xl:24px;--os-shadow:0 1px 3px rgba(15,23,42,.05);--os-shadow-md:0 4px 16px rgba(15,23,42,.07);--os-shadow-lg:0 16px 48px rgba(15,23,42,.1);--os-shadow-xl:0 24px 64px rgba(15,23,42,.14);--os-transition:.2s cubic-bezier(.4,0,.2,1);--os-ease:cubic-bezier(.16,1,.3,1);--immo:#2563EB;--immo-light:#DBEAFE;--immo-dark:#1D4ED8;--steuer:#2E7D32;--steuer-light:#E8F5E9;--steuer-dark:#1B5E20;--reise:#F57C00;--reise-light:#FFF3E0;--reise-dark:#E65100;--recht:#3B3B5C;--recht-light:#EDEDF3;--recht-dark:#2A2A44;--os-success:#16A34A;--os-warning:#F59E0B;--os-error:#DC2626;--os-info:#2563EB}
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{font-size:16px;scroll-behavior:smooth;-webkit-font-smoothing:antialiased}
body{font-family:'Inter',system-ui,sans-serif;color:var(--os-text);background:var(--os-bg);line-height:1.6}
a{color:var(--os-accent);text-decoration:none;transition:color var(--os-transition)}a:hover{color:var(--immo-dark)}
img{max-width:100%;height:auto;display:block}
::selection{background:var(--immo-light);color:var(--immo-dark)}
h1,h2,h3,h4{font-weight:800;line-height:1.15;color:var(--os-primary);letter-spacing:-.03em}
h1{font-size:clamp(2.2rem,5.5vw,3.75rem)}h2{font-size:clamp(1.6rem,3.5vw,2.5rem)}h3{font-size:clamp(1.15rem,2vw,1.4rem)}h4{font-size:1rem;font-weight:700}
.os-label{font-size:.72rem;font-weight:700;letter-spacing:.1em;text-transform:uppercase;color:var(--os-accent)}
.os-container{max-width:1160px;margin:0 auto;padding:0 24px}.os-container--wide{max-width:1360px}.os-container--narrow{max-width:720px}
.os-section{padding:96px 0}.os-section--alt{background:#fff}
.os-grid{display:grid;gap:24px}.os-grid--2{grid-template-columns:repeat(auto-fit,minmax(320px,1fr))}.os-grid--3{grid-template-columns:repeat(auto-fit,minmax(280px,1fr))}.os-grid--4{grid-template-columns:repeat(auto-fit,minmax(240px,1fr))}

/* Nav */
.os-nav{position:sticky;top:0;z-index:100;height:64px;padding:0 24px;background:rgba(255,255,255,.85);backdrop-filter:blur(16px) saturate(180%);border-bottom:1px solid rgba(226,232,240,.6);transition:box-shadow .3s}
.os-nav.scrolled{box-shadow:0 1px 12px rgba(15,23,42,.06)}
.os-nav__inner{max-width:1160px;margin:0 auto;display:flex;align-items:center;justify-content:space-between;height:100%}
.os-nav__logo{display:flex;align-items:center;gap:10px;font-weight:800;font-size:1.15rem;color:var(--os-primary)}
.os-nav__logo img,.os-nav__logo svg{height:30px}
.os-nav__links{display:flex;gap:28px;list-style:none}
.os-nav__links a{font-size:.85rem;font-weight:500;color:var(--os-text-2);transition:color var(--os-transition);position:relative}
.os-nav__links a:hover,.os-nav__links a.active{color:var(--os-primary)}
.os-nav__links a.active::after{content:'';position:absolute;bottom:-6px;left:0;right:0;height:2px;background:var(--os-accent);border-radius:1px}
.os-nav__cta{display:flex;gap:10px;align-items:center}
.os-nav__toggle{display:none;background:none;border:none;cursor:pointer;padding:8px}
.os-nav__toggle span{display:block;width:20px;height:2px;background:var(--os-primary);margin:4px 0;transition:var(--os-transition);border-radius:1px}
@media(max-width:768px){.os-nav__toggle{display:block}.os-nav__links{display:none}.os-nav__links.open{display:flex;flex-direction:column;position:absolute;top:64px;left:0;right:0;background:#fff;border-bottom:1px solid var(--os-border);padding:24px;gap:18px;box-shadow:var(--os-shadow-md)}}

/* Buttons */
.os-btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:10px 22px;border-radius:var(--os-radius);font-weight:600;font-size:.875rem;border:none;cursor:pointer;transition:all var(--os-transition);text-decoration:none;line-height:1.4;white-space:nowrap}
.os-btn:hover{transform:translateY(-1px)}.os-btn:active{transform:translateY(0)}
.os-btn--primary{background:var(--os-accent);color:#fff;box-shadow:0 1px 3px rgba(37,99,235,.3)}.os-btn--primary:hover{background:var(--immo-dark);color:#fff;box-shadow:0 4px 12px rgba(37,99,235,.35)}
.os-btn--dark{background:var(--os-primary);color:#fff}.os-btn--dark:hover{background:#1E293B;color:#fff}
.os-btn--outline{background:transparent;border:1.5px solid var(--os-border-2);color:var(--os-text)}.os-btn--outline:hover{border-color:var(--os-accent);color:var(--os-accent);background:rgba(37,99,235,.04)}
.os-btn--ghost{background:transparent;color:var(--os-text-2);padding:10px 16px}.os-btn--ghost:hover{background:var(--os-bg);color:var(--os-primary)}
.os-btn--sm{padding:7px 16px;font-size:.8rem;border-radius:8px}.os-btn--lg{padding:14px 28px;font-size:.95rem;border-radius:12px}.os-btn--block{width:100%}
.os-btn--immo{background:var(--immo);color:#fff}.os-btn--immo:hover{background:var(--immo-dark);color:#fff}
.os-btn--steuer{background:var(--steuer);color:#fff}.os-btn--steuer:hover{background:var(--steuer-dark);color:#fff}
.os-btn--reise{background:var(--reise);color:#fff}.os-btn--reise:hover{background:var(--reise-dark);color:#fff}
.os-btn--recht{background:var(--recht);color:#fff}.os-btn--recht:hover{background:var(--recht-dark);color:#fff}

/* Cards */
.os-card{background:var(--os-bg-white);border-radius:var(--os-radius-lg);border:1px solid var(--os-border);padding:28px;transition:all .25s var(--os-ease)}
.os-card:hover{box-shadow:var(--os-shadow-md);border-color:var(--os-border-2)}
.os-card--product{position:relative;overflow:hidden;color:#fff;border:none;padding:36px 28px;display:flex;flex-direction:column;min-height:260px;border-radius:var(--os-radius-xl)}
.os-card--product::after{content:'';position:absolute;top:-40%;right:-20%;width:55%;height:130%;background:rgba(255,255,255,.06);border-radius:50%}
.os-card--product h3{color:#fff;font-size:1.6rem;margin-bottom:6px}.os-card--product p{color:rgba(255,255,255,.8);font-size:.9rem;line-height:1.6}
.os-card--product:hover{transform:translateY(-4px);box-shadow:var(--os-shadow-xl)}
.os-card--immo{background:linear-gradient(135deg,var(--immo),var(--immo-dark))}
.os-card--steuer{background:linear-gradient(135deg,var(--steuer),var(--steuer-dark))}
.os-card--reise{background:linear-gradient(135deg,var(--reise),var(--reise-dark))}
.os-card--recht{background:linear-gradient(135deg,var(--recht),var(--recht-dark))}

/* Badges */
.os-badge{display:inline-flex;align-items:center;gap:4px;padding:3px 10px;border-radius:20px;font-size:.72rem;font-weight:600}
.os-badge--immo{background:var(--immo-light);color:var(--immo-dark)}.os-badge--steuer{background:var(--steuer-light);color:var(--steuer-dark)}.os-badge--reise{background:var(--reise-light);color:var(--reise-dark)}.os-badge--recht{background:var(--recht-light);color:var(--recht-dark)}
.os-badge--success{background:#DCFCE7;color:#166534}.os-badge--warning{background:#FEF3C7;color:#92400E}.os-badge--error{background:#FEE2E2;color:#991B1B}

/* Hero */
.os-hero{text-align:center;padding:100px 24px 72px;background:linear-gradient(180deg,#fff 0%,var(--os-bg) 100%)}
.os-hero__claim{font-size:.85rem;font-weight:700;letter-spacing:.08em;text-transform:uppercase;color:var(--os-accent);margin-bottom:16px}
.os-hero h1{margin-bottom:20px}.os-hero p{font-size:1.1rem;color:var(--os-text-2);max-width:600px;margin:0 auto 28px;line-height:1.7}
.os-hero__actions{display:flex;gap:12px;justify-content:center;flex-wrap:wrap}

/* Features */
.os-feature{text-align:center;padding:20px}
.os-feature__icon{width:52px;height:52px;border-radius:13px;display:flex;align-items:center;justify-content:center;margin:0 auto 14px;font-size:1.4rem;background:var(--os-bg);color:var(--os-accent);transition:transform .2s var(--os-ease)}
.os-feature:hover .os-feature__icon{transform:scale(1.1)}.os-feature h4{margin-bottom:8px}.os-feature p{font-size:.88rem;color:var(--os-text-2);line-height:1.6}

/* Pricing */
.os-pricing{border:1px solid var(--os-border);border-radius:var(--os-radius-xl);padding:36px 24px;text-align:center;position:relative;background:#fff;transition:all .25s var(--os-ease)}
.os-pricing:hover{box-shadow:var(--os-shadow-md)}.os-pricing--featured{border-color:var(--os-accent);box-shadow:0 0 0 1px var(--os-accent),var(--os-shadow-md)}
.os-pricing--featured::before{content:'Beliebt';position:absolute;top:-12px;left:50%;transform:translateX(-50%);background:var(--os-accent);color:#fff;padding:3px 16px;border-radius:20px;font-size:.72rem;font-weight:700}
.os-pricing__price{font-size:2.75rem;font-weight:900;color:var(--os-primary);margin:16px 0 4px;letter-spacing:-.03em}.os-pricing__price span{font-size:.85rem;font-weight:400;color:var(--os-text-3)}
.os-pricing__features{list-style:none;margin:24px 0;text-align:left}
.os-pricing__features li{padding:7px 0;font-size:.88rem;color:var(--os-text-2);display:flex;align-items:baseline;gap:10px}
.os-pricing__features li::before{content:'✓';color:var(--os-success);font-weight:700;font-size:.8rem;flex-shrink:0}

/* Forms */
.os-form-group{margin-bottom:18px}.os-form-group label{display:block;font-size:.82rem;font-weight:600;color:var(--os-text);margin-bottom:5px}
.os-input{width:100%;padding:10px 14px;border:1.5px solid var(--os-border);border-radius:var(--os-radius);font-size:.9rem;font-family:inherit;transition:border-color var(--os-transition),box-shadow var(--os-transition);background:#fff;color:var(--os-text)}
.os-input:focus{outline:none;border-color:var(--os-accent);box-shadow:0 0 0 3px rgba(37,99,235,.08)}
textarea.os-input{resize:vertical;min-height:100px}
select.os-input{appearance:none;background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%2394A3B8' d='M6 8L1 3h10z'/%3E%3C/svg%3E");background-repeat:no-repeat;background-position:right 12px center;padding-right:36px}

/* Alerts */
.os-alert{padding:12px 16px;border-radius:var(--os-radius);font-size:.9rem;margin-bottom:16px;font-weight:500}
.os-alert--success{background:#DCFCE7;color:#166534;border:1px solid #BBF7D0}.os-alert--error{background:#FEE2E2;color:#991B1B;border:1px solid #FECACA}
.os-alert--warning{background:#FEF3C7;color:#92400E;border:1px solid #FDE68A}.os-alert--info{background:var(--immo-light);color:var(--immo-dark);border:1px solid #BFDBFE}

/* Tables */
.os-table{width:100%;border-collapse:collapse;font-size:.875rem}
.os-table th{text-align:left;padding:10px 14px;font-weight:600;color:var(--os-text-2);background:var(--os-bg);border-bottom:2px solid var(--os-border);font-size:.75rem;text-transform:uppercase;letter-spacing:.04em}
.os-table td{padding:12px 14px;border-bottom:1px solid var(--os-border);vertical-align:middle}.os-table tr:hover td{background:#FAFBFC}

/* Footer */
.os-footer{background:var(--os-primary);color:rgba(255,255,255,.6);padding:64px 24px 32px;font-size:.85rem}
.os-footer a{color:rgba(255,255,255,.75);transition:color .15s}.os-footer a:hover{color:#fff}
.os-footer__grid{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:40px;margin-bottom:40px}
.os-footer__col h4{color:#fff;font-size:.85rem;font-weight:700;margin-bottom:14px}.os-footer__col ul{list-style:none}.os-footer__col li{margin-bottom:8px}
.os-footer__bottom{border-top:1px solid rgba(255,255,255,.08);padding-top:24px;display:flex;justify-content:space-between;align-items:center}
@media(max-width:768px){.os-footer__grid{grid-template-columns:1fr 1fr}}

/* Admin */
.os-admin{display:grid;grid-template-columns:240px 1fr;min-height:100vh}
.os-sidebar{background:var(--os-primary);color:#fff;padding:24px 0;position:sticky;top:0;height:100vh;overflow-y:auto}
.os-sidebar__logo{padding:0 20px 24px;font-weight:800;font-size:1.05rem}
.os-sidebar__nav{list-style:none}
.os-sidebar__nav a{display:flex;align-items:center;gap:10px;padding:9px 20px;color:rgba(255,255,255,.55);font-size:.84rem;font-weight:500;transition:all var(--os-transition)}
.os-sidebar__nav a:hover{color:#fff;background:rgba(255,255,255,.07)}
.os-sidebar__nav a.active{color:#fff;background:rgba(255,255,255,.1);border-right:3px solid var(--os-accent)}
.os-sidebar__section{font-size:.65rem;font-weight:700;letter-spacing:.1em;text-transform:uppercase;color:rgba(255,255,255,.25);padding:20px 20px 6px}
.os-admin__main{padding:24px 32px;background:var(--os-bg)}
.os-admin__header{display:flex;justify-content:space-between;align-items:center;margin-bottom:24px}.os-admin__header h1{font-size:1.4rem}

/* Stats */
.os-stats{display:grid;grid-template-columns:repeat(auto-fit,minmax(180px,1fr));gap:16px;margin-bottom:28px}
.os-stat{background:#fff;border-radius:var(--os-radius-lg);padding:20px;border:1px solid var(--os-border)}
.os-stat__label{font-size:.75rem;font-weight:600;color:var(--os-text-3);text-transform:uppercase;letter-spacing:.04em}
.os-stat__value{font-size:1.9rem;font-weight:900;color:var(--os-primary);margin-top:4px;letter-spacing:-.02em}
.os-stat__sub{font-size:.78rem;color:var(--os-text-3);margin-top:2px}

/* Portal */
.os-portal{max-width:960px;margin:0 auto;padding:32px 24px}
.os-portal__nav{display:flex;gap:4px;border-bottom:2px solid var(--os-border);margin-bottom:32px}
.os-portal__nav a{padding:10px 18px;font-size:.875rem;font-weight:500;color:var(--os-text-2);border-bottom:2px solid transparent;margin-bottom:-2px;transition:all var(--os-transition)}
.os-portal__nav a:hover{color:var(--os-primary)}.os-portal__nav a.active{color:var(--os-accent);border-bottom-color:var(--os-accent)}

/* Animations */
@keyframes fadeInUp{from{opacity:0;transform:translateY(24px)}to{opacity:1;transform:translateY(0)}}
.os-animate{animation:fadeInUp .6s var(--os-ease) both}
.os-animate--d1{animation-delay:.1s}.os-animate--d2{animation-delay:.2s}.os-animate--d3{animation-delay:.3s}.os-animate--d4{animation-delay:.4s}.os-animate--d5{animation-delay:.5s}
[data-animate]{opacity:0;transform:translateY(20px);transition:opacity .5s var(--os-ease),transform .5s var(--os-ease)}
[data-animate].visible{opacity:1;transform:translateY(0)}

/* Utilities */
.text-center{text-align:center}.text-right{text-align:right}
.mt-0{margin-top:0}.mt-1{margin-top:8px}.mt-2{margin-top:16px}.mt-3{margin-top:24px}.mt-4{margin-top:32px}.mt-5{margin-top:48px}
.mb-0{margin-bottom:0}.mb-1{margin-bottom:8px}.mb-2{margin-bottom:16px}.mb-3{margin-bottom:24px}.mb-4{margin-bottom:32px}
.hidden{display:none!important}
@media(max-width:768px){.os-admin{grid-template-columns:1fr}.os-sidebar{display:none}.os-section{padding:56px 0}h1{font-size:clamp(1.8rem,6vw,2.8rem)}}