@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700;800&display=swap');
:root{
--bg:#f0f4f8;
--bg-2:#e8edf3;
--surface:#ffffff;
--surface-2:#f8fafc;
--border-c:#e2e8f0;
--text:#0f172a;
--text-muted:#64748b;
--blue:#2563eb;
--blue-dark:#1d4ed8;
--blue-light:#dbeafe;
--blue-mid:#93c5fd;
--green:#16a34a;
--green-dark:#15803d;
--green-light:#dcfce7;
--teal:#0d9488;
--orange:#ea580c;
--red:#dc2626;
--shadow-sm:0 1px 3px rgba(15,23,42,.08),0 1px 2px rgba(15,23,42,.06);
--shadow:0 4px 16px rgba(15,23,42,.1),0 2px 6px rgba(15,23,42,.06);
--shadow-lg:0 16px 40px rgba(15,23,42,.14),0 4px 12px rgba(15,23,42,.08);
--radius:14px;
--radius-sm:9px;
--radius-xs:6px;
--font:'Inter',sans-serif;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
html,body{height:100%}
body{font-family:var(--font);background:var(--bg);color:var(--text);-webkit-font-smoothing:antialiased;line-height:1.5}
a{color:inherit;text-decoration:none}
h1,h2,h3,h4{font-weight:700;line-height:1.2}

/* ── Auth pages ── */
.auth-body{min-height:100vh;display:flex;align-items:center;justify-content:center;background:linear-gradient(135deg,#eff6ff 0%,#f0fdf4 50%,#f0f4f8 100%);padding:24px}
.auth-card{width:100%;max-width:400px;background:var(--surface);border:1px solid var(--border-c);border-radius:var(--radius);padding:40px 36px;box-shadow:var(--shadow-lg)}
.auth-logo{width:48px;height:48px;border-radius:12px;background:linear-gradient(135deg,var(--blue),var(--green));display:flex;align-items:center;justify-content:center;font-size:22px;margin-bottom:24px}
.admin-logo{background:linear-gradient(135deg,var(--green),var(--teal))}
.auth-title{font-size:22px;font-weight:800;color:var(--text);margin-bottom:4px}
.auth-sub{color:var(--text-muted);font-size:13.5px;margin-bottom:28px}
.auth-error{background:#fef2f2;border:1px solid #fecaca;color:#b91c1c;border-radius:var(--radius-sm);padding:10px 14px;font-size:13px;margin-bottom:18px}
.auth-foot{margin-top:22px;text-align:center;font-size:12.5px;color:var(--text-muted)}
.auth-foot a{color:var(--blue);text-underline-offset:2px;text-decoration:underline}
.field-group{margin-bottom:16px}
.field-label{display:block;font-size:13px;font-weight:600;color:var(--text);margin-bottom:6px}
.field-input{width:100%;background:var(--surface-2);border:1.5px solid var(--border-c);color:var(--text);border-radius:var(--radius-sm);padding:10px 13px;font-size:14px;font-family:var(--font);transition:border-color .15s ease,box-shadow .15s ease;outline:none}
.field-input:focus{border-color:var(--blue);box-shadow:0 0 0 3px rgba(37,99,235,.14)}
.field-input::placeholder{color:#94a3b8}
.field-input.small{padding:6px 10px;font-size:13px}
.btn-auth{display:block;width:100%;background:linear-gradient(135deg,var(--blue),var(--blue-dark));color:#fff;border:none;border-radius:var(--radius-sm);padding:12px;font-size:14px;font-weight:700;font-family:var(--font);cursor:pointer;transition:transform .15s ease,box-shadow .15s ease;margin-top:4px}
.btn-auth:hover{transform:translateY(-1px);box-shadow:0 6px 20px rgba(37,99,235,.35)}
.btn-auth.outline{background:var(--surface);border:1.5px solid var(--border-c);color:var(--text-muted)}
.btn-auth.outline:hover{background:var(--surface-2);box-shadow:none;transform:none}
.admin-btn{background:linear-gradient(135deg,var(--green),var(--green-dark))}
.admin-btn:hover{box-shadow:0 6px 20px rgba(22,163,74,.35)}
.btn-page-select{display:block;width:100%;background:var(--blue-light);border:1.5px solid var(--blue-mid);color:var(--blue-dark);border-radius:var(--radius-sm);padding:13px 16px;font-size:14px;font-weight:600;font-family:var(--font);cursor:pointer;text-align:left;margin-bottom:10px;transition:all .15s ease}
.btn-page-select:hover{background:var(--blue);color:#fff;border-color:var(--blue)}

/* ── Landing nav ── */
.landing-nav{position:sticky;top:0;z-index:20;background:rgba(255,255,255,.92);backdrop-filter:blur(12px);border-bottom:1px solid var(--border-c);padding:16px 40px;display:flex;align-items:center;justify-content:space-between;box-shadow:var(--shadow-sm)}
.landing-nav .brand{font-weight:800;font-size:17px;display:flex;align-items:center;gap:8px;color:var(--blue)}
.landing-nav .nav-links{display:flex;align-items:center;gap:28px;font-size:14px;color:var(--text-muted)}
.landing-nav .nav-links a:hover{color:var(--blue)}
.landing-nav .btn-nav{background:linear-gradient(135deg,var(--blue),var(--green));color:#fff;border:none;border-radius:var(--radius-sm);padding:9px 20px;font-size:13px;font-weight:700;font-family:var(--font);cursor:pointer;text-decoration:none;transition:opacity .15s}
.landing-nav .btn-nav:hover{opacity:.88}
.nav-toggle{display:none;background:none;border:none;color:var(--text);font-size:22px;cursor:pointer}

/* ── Hero ── */
.hero-body{position:relative;overflow:hidden;background:linear-gradient(160deg,#eff6ff 0%,#f0fdf4 50%,#f8fafc 100%)}
.orb{position:absolute;border-radius:50%;filter:blur(70px);opacity:.45;pointer-events:none}
.orb-1{width:320px;height:320px;background:#3b82f6;top:-80px;left:-60px;animation:drift1 18s ease-in-out infinite}
.orb-2{width:240px;height:240px;background:#22c55e;top:100px;right:8%;animation:drift2 22s ease-in-out infinite}
.orb-3{width:180px;height:180px;background:#60a5fa;bottom:0;left:14%;animation:drift1 24s ease-in-out infinite reverse}
@keyframes drift1{0%,100%{transform:translate(0,0)}50%{transform:translate(40px,30px)}}
@keyframes drift2{0%,100%{transform:translate(0,0)}50%{transform:translate(-30px,-40px)}}
.hero{position:relative;z-index:1;max-width:760px;margin:0 auto;padding:90px 24px 70px;text-align:center;display:flex;flex-direction:column;align-items:center}
.brand-badge{display:inline-flex;align-items:center;gap:8px;background:var(--surface);border:1.5px solid var(--border-c);color:var(--text-muted);font-size:13px;padding:6px 14px;border-radius:999px;margin-bottom:26px;box-shadow:var(--shadow-sm)}
.brand-badge .dot{width:7px;height:7px;border-radius:50%;background:var(--green)}
.hero h1{font-size:clamp(34px,5vw,54px);line-height:1.12;font-weight:800;letter-spacing:-.025em;color:var(--text)}
.hero h1 span{background:linear-gradient(135deg,var(--blue),var(--green));-webkit-background-clip:text;background-clip:text;color:transparent}
.hero p{color:var(--text-muted);font-size:17px;margin-top:18px;max-width:520px;line-height:1.65}
.hero-actions{display:flex;gap:12px;margin-top:32px;flex-wrap:wrap;justify-content:center}
.btn-hero-primary{background:linear-gradient(135deg,var(--blue),var(--green));color:#fff;border:none;border-radius:var(--radius-sm);padding:14px 28px;font-size:15px;font-weight:700;font-family:var(--font);cursor:pointer;text-decoration:none;transition:transform .15s,box-shadow .15s;display:inline-block}
.btn-hero-primary:hover{transform:translateY(-2px);box-shadow:0 8px 24px rgba(37,99,235,.3)}
.btn-hero-outline{background:var(--surface);color:var(--text-muted);border:1.5px solid var(--border-c);border-radius:var(--radius-sm);padding:13px 24px;font-size:15px;font-weight:600;font-family:var(--font);cursor:pointer;text-decoration:none;display:inline-block;transition:all .15s}
.btn-hero-outline:hover{border-color:var(--blue);color:var(--blue)}
.bubble-stack{margin-top:56px;display:flex;flex-direction:column;gap:10px;max-width:320px;align-items:stretch}
.bubble-demo{padding:12px 16px;border-radius:16px;font-size:14px;width:fit-content;opacity:0;animation:floatIn .6s ease forwards}
.bubble-demo.in{background:var(--surface);border:1px solid var(--border-c);align-self:flex-start;animation-delay:.15s;color:var(--text)}
.bubble-demo.out{background:linear-gradient(135deg,var(--blue),var(--green));align-self:flex-end;animation-delay:.4s;color:#fff}
@keyframes floatIn{from{opacity:0;transform:translateY(8px)}to{opacity:1;transform:translateY(0)}}

/* ── Sections ── */
.section{max-width:1080px;margin:0 auto;padding:80px 24px}
.section-eyebrow{color:var(--blue);font-size:13px;font-weight:700;letter-spacing:.06em;text-transform:uppercase;margin-bottom:10px;text-align:center}
.section-title{font-size:clamp(26px,3.4vw,36px);font-weight:800;text-align:center;letter-spacing:-.015em;color:var(--text)}
.section-sub{color:var(--text-muted);text-align:center;max-width:520px;margin:14px auto 0;font-size:15.5px;line-height:1.65}
.steps-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;margin-top:48px}
.step-card{background:var(--surface);border:1.5px solid var(--border-c);border-radius:var(--radius);padding:28px;box-shadow:var(--shadow-sm);transition:transform .15s}
.step-card:hover{transform:translateY(-3px)}
.step-num{font-weight:800;font-size:26px;color:var(--blue);margin-bottom:14px}
.step-card h3{font-size:17px;margin-bottom:8px;color:var(--text)}
.step-card p{color:var(--text-muted);font-size:14px;line-height:1.6}
.features-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;margin-top:48px}
.feature-card{background:var(--surface);border:1.5px solid var(--border-c);border-radius:var(--radius);padding:26px;box-shadow:var(--shadow-sm);transition:border-color .15s,transform .15s}
.feature-card:hover{border-color:var(--blue);transform:translateY(-3px)}
.feature-icon{width:42px;height:42px;border-radius:11px;background:linear-gradient(135deg,var(--blue),var(--green));display:flex;align-items:center;justify-content:center;font-size:18px;margin-bottom:14px}
.feature-card h3{font-size:16px;margin-bottom:8px;color:var(--text)}
.feature-card p{color:var(--text-muted);font-size:14px;line-height:1.6}
.cta-band{background:linear-gradient(135deg,var(--blue),var(--green));border-radius:20px;padding:56px 24px;text-align:center;margin:0 24px}
.cta-band h2{font-size:clamp(24px,3vw,32px);font-weight:800;color:#fff}
.cta-band p{color:rgba(255,255,255,.8);margin-top:10px;font-size:16px}
.btn-cta{display:inline-block;background:#fff;color:var(--blue);border:none;border-radius:var(--radius-sm);padding:14px 30px;font-size:15px;font-weight:700;font-family:var(--font);cursor:pointer;text-decoration:none;margin-top:22px;transition:transform .15s,box-shadow .15s}
.btn-cta:hover{transform:translateY(-2px);box-shadow:0 8px 24px rgba(0,0,0,.2)}
.landing-footer{border-top:1px solid var(--border-c);padding:44px 40px 30px;background:var(--surface);margin-top:60px}
.landing-footer .foot-top{display:flex;flex-wrap:wrap;justify-content:space-between;gap:24px;max-width:1080px;margin:0 auto}
.landing-footer .brand{font-weight:800;font-size:16px;color:var(--blue)}
.landing-footer .foot-links{display:flex;gap:22px;flex-wrap:wrap;font-size:13.5px;color:var(--text-muted)}
.landing-footer .foot-links a:hover{color:var(--blue)}
.landing-footer .foot-bottom{text-align:center;color:var(--text-muted);font-size:12.5px;margin-top:34px}

/* ── App topbar ── */
.topbar{height:60px;background:var(--surface);border-bottom:1.5px solid var(--border-c);display:flex;align-items:center;justify-content:space-between;padding:0 20px;position:sticky;top:0;z-index:10;box-shadow:var(--shadow-sm)}
.topbar-brand{font-weight:800;font-size:15px;color:var(--blue)}
.topbar-left,.topbar-right{display:flex;align-items:center;gap:10px}
.topbar-btn{background:var(--bg);border:1.5px solid var(--border-c);color:var(--text-muted);border-radius:var(--radius-xs);padding:6px 13px;font-size:13px;font-weight:500;font-family:var(--font);cursor:pointer;text-decoration:none;transition:all .15s;white-space:nowrap}
.topbar-btn:hover{background:var(--blue-light);border-color:var(--blue-mid);color:var(--blue)}
.topbar-btn.danger{color:var(--red)}
.topbar-btn.danger:hover{background:#fef2f2;border-color:#fecaca;color:var(--red)}
.credit-chip{background:var(--green-light);border:1.5px solid #86efac;color:var(--green-dark);border-radius:999px;padding:5px 14px;font-size:13px;font-weight:700}

/* ── App layout ── */
.app-container{display:flex;height:calc(100vh - 60px);background:var(--bg)}
.sidebar{width:320px;min-width:260px;background:var(--surface);border-right:1.5px solid var(--border-c);display:flex;flex-direction:column}
.sidebar-search{padding:12px}
.contact-list{overflow-y:auto;flex:1;padding-bottom:8px}
.contact-item{display:flex;align-items:center;gap:11px;padding:11px 12px;cursor:pointer;border-radius:var(--radius-sm);margin:3px 8px;transition:background .12s}
.contact-item:hover{background:var(--bg)}
.contact-item.active{background:var(--blue-light);box-shadow:inset 0 0 0 1.5px rgba(37,99,235,.3)}
.contact-avatar{width:42px;height:42px;border-radius:50%;background:linear-gradient(135deg,var(--blue),var(--green));color:#fff;display:flex;align-items:center;justify-content:center;font-weight:700;font-size:13px;flex-shrink:0;overflow:hidden}
.contact-avatar img{width:100%;height:100%;object-fit:cover}
.contact-meta{overflow:hidden}
.contact-name{font-weight:600;font-size:14px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;color:var(--text)}
.contact-time{font-size:12px;color:var(--text-muted)}

/* ── Chat panel ── */
.chat-panel{flex:1;display:flex;flex-direction:column;background:var(--bg-2)}
.chat-empty{flex:1;display:flex;align-items:center;justify-content:center;color:var(--text-muted);font-size:15px;flex-direction:column;gap:12px}
.chat-header{padding:12px 18px;border-bottom:1.5px solid var(--border-c);background:var(--surface);display:flex;align-items:center;gap:12px;box-shadow:var(--shadow-sm)}
.back-btn{display:none;background:none;border:none;color:var(--blue);font-size:18px;cursor:pointer;padding:4px 8px;border-radius:var(--radius-xs)}
.chat-header-info{display:flex;align-items:center;gap:10px}
.chat-header-avatar{width:36px;height:36px;border-radius:50%;background:linear-gradient(135deg,var(--blue),var(--green));display:flex;align-items:center;justify-content:center;color:#fff;font-size:12px;font-weight:700;flex-shrink:0}
.chat-header-name{font-weight:700;font-size:15px;color:var(--text)}
.chat-header-sub{font-size:12px;color:var(--text-muted)}
.chat-messages{flex:1;overflow-y:auto;padding:20px;display:flex;flex-direction:column;gap:4px}
.msg-bubble{max-width:65%;padding:10px 15px;border-radius:18px;font-size:14px;line-height:1.45;word-wrap:break-word}
.msg-in{align-self:flex-start;background:var(--surface);color:var(--text);border:1.5px solid var(--border-c);box-shadow:var(--shadow-sm)}
.msg-out{align-self:flex-end;background:linear-gradient(135deg,var(--blue),var(--green));color:#fff}
.msg-time{font-size:11px;color:var(--text-muted);margin:2px 6px 8px}
.chat-input-bar{padding:14px 18px;border-top:1.5px solid var(--border-c);background:var(--surface)}
.input-row{display:flex;gap:10px}
.input-row .field-input{flex:1}
.btn-send{background:linear-gradient(135deg,var(--blue),var(--green));color:#fff;border:none;border-radius:var(--radius-sm);padding:10px 20px;font-size:14px;font-weight:700;font-family:var(--font);cursor:pointer;transition:opacity .15s,transform .15s;white-space:nowrap}
.btn-send:hover{opacity:.9;transform:translateY(-1px)}
.btn-send:disabled{opacity:.45;cursor:not-allowed;transform:none}
.no-credits-warn{background:#fef2f2;border:1.5px solid #fecaca;color:#b91c1c;border-radius:var(--radius-sm);padding:8px 12px;font-size:13px;font-weight:600;margin-bottom:10px}
.hidden{display:none!important}

/* ── Connect screen ── */
.connect-screen{min-height:calc(100vh - 0px);display:flex;align-items:center;justify-content:center;background:linear-gradient(135deg,#eff6ff,#f0fdf4);padding:24px}
.connect-card{background:var(--surface);border:1.5px solid var(--border-c);border-radius:var(--radius);padding:40px;max-width:440px;width:100%;text-align:center;box-shadow:var(--shadow-lg)}
.connect-icon{font-size:40px;margin-bottom:16px}
.connect-card h3{font-size:22px;font-weight:800;margin-bottom:8px;color:var(--text)}
.connect-card p{color:var(--text-muted);font-size:14.5px;line-height:1.6}
.credit-info-box{background:var(--green-light);border:1.5px solid #86efac;color:var(--green-dark);border-radius:var(--radius-sm);padding:10px 16px;font-size:14px;font-weight:600;margin-top:18px}

/* ── Admin panel ── */
.admin-body{background:var(--bg);min-height:100vh}
.admin-nav{background:var(--surface);border-bottom:1.5px solid var(--border-c);padding:0 28px;height:62px;display:flex;align-items:center;justify-content:space-between;box-shadow:var(--shadow-sm);position:sticky;top:0;z-index:10}
.admin-brand{font-weight:800;font-size:17px;color:var(--text);display:flex;align-items:center;gap:8px}
.admin-nav-right{display:flex;align-items:center;gap:8px}
.admin-nav-link{background:var(--bg);border:1.5px solid var(--border-c);color:var(--text-muted);border-radius:var(--radius-xs);padding:7px 16px;font-size:13px;font-weight:600;font-family:var(--font);cursor:pointer;text-decoration:none;transition:all .15s}
.admin-nav-link:hover{background:var(--blue-light);border-color:var(--blue-mid);color:var(--blue)}
.admin-nav-link.danger{color:var(--red)}
.admin-nav-link.danger:hover{background:#fef2f2;border-color:#fecaca}
.admin-toast{padding:14px 20px;font-size:14px;font-weight:600;text-align:center;border-bottom:2px solid}
.toast-success{background:var(--green-light);color:var(--green-dark);border-color:#86efac}
.toast-error{background:#fef2f2;color:#b91c1c;border-color:#fecaca}
.admin-content{max-width:1200px;margin:0 auto;padding:28px 24px}
.stats-row{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;margin-bottom:28px}
.stat-card{background:var(--surface);border:1.5px solid var(--border-c);border-radius:var(--radius);padding:22px 24px;display:flex;align-items:center;gap:18px;box-shadow:var(--shadow-sm)}
.stat-icon{width:48px;height:48px;border-radius:12px;display:flex;align-items:center;justify-content:center;font-size:22px;flex-shrink:0}
.stat-icon.blue{background:var(--blue-light)}
.stat-icon.green{background:var(--green-light)}
.stat-icon.teal{background:#ccfbf1}
.stat-num{font-size:28px;font-weight:800;color:var(--text)}
.stat-label{font-size:13px;color:var(--text-muted);font-weight:500;margin-top:2px}
.admin-grid{display:grid;grid-template-columns:1fr 1fr;gap:20px;margin-bottom:20px}
.admin-card{background:var(--surface);border:1.5px solid var(--border-c);border-radius:var(--radius);padding:24px;box-shadow:var(--shadow-sm)}
.admin-card.full-width{grid-column:1/-1}
.admin-card-head{font-size:15px;font-weight:700;color:var(--text);margin-bottom:18px;padding-bottom:14px;border-bottom:1.5px solid var(--border-c)}
.admin-form{display:flex;flex-direction:column;gap:0}
.btn-action{border:none;border-radius:var(--radius-sm);padding:11px 20px;font-size:14px;font-weight:700;font-family:var(--font);cursor:pointer;margin-top:8px;transition:transform .12s,box-shadow .12s;color:#fff}
.btn-action.blue{background:linear-gradient(135deg,var(--blue),var(--blue-dark))}
.btn-action.blue:hover{box-shadow:0 4px 14px rgba(37,99,235,.35);transform:translateY(-1px)}
.btn-action.green{background:linear-gradient(135deg,var(--green),var(--green-dark))}
.btn-action.green:hover{box-shadow:0 4px 14px rgba(22,163,74,.35);transform:translateY(-1px)}
.table-wrap{overflow-x:auto}
.admin-table{width:100%;border-collapse:collapse;font-size:14px}
.admin-table th{background:var(--bg);color:var(--text-muted);font-size:12px;font-weight:700;text-transform:uppercase;letter-spacing:.04em;padding:10px 14px;text-align:left;border-bottom:1.5px solid var(--border-c)}
.admin-table td{padding:12px 14px;border-bottom:1px solid var(--border-c);vertical-align:middle;color:var(--text)}
.admin-table tr:last-child td{border-bottom:none}
.admin-table tr:hover td{background:var(--bg)}
.credit-badge{background:var(--green-light);color:var(--green-dark);border:1px solid #86efac;border-radius:999px;padding:3px 12px;font-size:13px;font-weight:700;white-space:nowrap}
.status-badge{border-radius:999px;padding:3px 12px;font-size:12px;font-weight:700}
.status-badge.active{background:var(--green-light);color:var(--green-dark)}
.status-badge.inactive{background:#fef2f2;color:#b91c1c}
.action-row{display:flex;align-items:center;gap:6px;flex-wrap:wrap}
.inline-form{display:flex;align-items:center;gap:5px}
.btn-sm{border:none;border-radius:var(--radius-xs);padding:5px 11px;font-size:12px;font-weight:700;font-family:var(--font);cursor:pointer;color:#fff;white-space:nowrap;transition:opacity .12s}
.btn-sm:hover{opacity:.82}
.btn-sm.blue{background:var(--blue)}
.btn-sm.green{background:var(--green)}
.btn-sm.red{background:var(--red)}
.btn-sm.orange{background:var(--orange)}
.btn-sm.teal{background:var(--teal)}
.empty-state{text-align:center;color:var(--text-muted);padding:40px;font-size:15px}

/* ── Legal pages ── */
.legal-body{background:var(--surface);color:var(--text);min-height:100vh}
.legal-nav{border-bottom:1.5px solid var(--border-c);padding:18px 32px;display:flex;align-items:center;justify-content:space-between}
.legal-nav .brand{font-weight:800;font-size:16px;color:var(--blue)}
.legal-wrap{max-width:760px;margin:0 auto;padding:56px 24px 100px}
.legal-wrap h1{font-size:32px;margin-bottom:8px}
.legal-wrap .updated{color:var(--text-muted);font-size:13px;margin-bottom:36px}
.legal-wrap h2{font-size:19px;margin-top:34px;margin-bottom:10px}
.legal-wrap p,.legal-wrap li{color:var(--text-muted);font-size:15px;line-height:1.75}
.legal-wrap ul{padding-left:20px}
.legal-wrap a{color:var(--blue)}

/* ── FAQ ── */
.faq-accordion .accordion-item{background:var(--surface);border:1.5px solid var(--border-c)!important;border-radius:var(--radius-sm)!important;margin-bottom:12px;overflow:hidden}
.faq-accordion .accordion-button{background:var(--surface)!important;color:var(--text)!important;font-weight:600;font-size:15px;box-shadow:none!important}
.faq-accordion .accordion-body{color:var(--text-muted);font-size:14.5px;line-height:1.7}

/* ── Responsive ── */
@media(max-width:960px){.stats-row,.admin-grid{grid-template-columns:1fr}}
@media(max-width:900px){.steps-grid,.features-grid{grid-template-columns:1fr}.landing-nav .nav-links{display:none}.nav-toggle{display:block}}
@media(max-width:768px){
.sidebar{width:100%;min-width:0;border-right:none}
.app-container{flex-direction:column}
.chat-panel{display:none;height:calc(100vh - 60px)}
.app-container.chat-open .sidebar{display:none}
.app-container.chat-open .chat-panel{display:flex}
.back-btn{display:block}
.topbar-right .topbar-btn:not(:last-child):not(.credit-chip){display:none}
.credit-chip{font-size:12px;padding:4px 10px}
}
@media(max-width:480px){.auth-card{padding:28px 22px}.admin-card{padding:18px}}