/* ==========================================================================
   Taskat Platform – Premium Design System v3
   ========================================================================== */
@font-face {
  font-family: "Vazirmatn";
  src: url("/static/vendor/fonts/Vazirmatn-Light.woff2") format("woff2");
  font-weight: 300;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: "Vazirmatn";
  src: url("/static/vendor/fonts/Vazirmatn-Regular.woff2") format("woff2");
  font-weight: 400;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: "Vazirmatn";
  src: url("/static/vendor/fonts/Vazirmatn-Medium.woff2") format("woff2");
  font-weight: 500;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: "Vazirmatn";
  src: url("/static/vendor/fonts/Vazirmatn-SemiBold.woff2") format("woff2");
  font-weight: 600;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: "Vazirmatn";
  src: url("/static/vendor/fonts/Vazirmatn-Bold.woff2") format("woff2");
  font-weight: 700;
  font-style: normal;
  font-display: swap;
}

:root {
  --tk-primary:#6366f1; --tk-primary-dark:#4f46e5; --tk-primary-light:#eef2ff;
  --tk-secondary:#64748b; --tk-success:#10b981; --tk-danger:#ef4444;
  --tk-warning:#f59e0b; --tk-info:#06b6d4; --tk-dark:#0f172a;
  --tk-body-bg:#f1f5f9; --tk-card-bg:#fff; --tk-border:#e2e8f0;
  --tk-text:#1e293b; --tk-text-muted:#94a3b8;
  --tk-radius:16px; --tk-radius-sm:10px; --tk-radius-xs:6px;
  --tk-shadow:0 1px 3px rgba(0,0,0,.04),0 1px 2px rgba(0,0,0,.06);
  --tk-shadow-md:0 4px 16px rgba(0,0,0,.07); --tk-shadow-lg:0 12px 40px rgba(0,0,0,.1);
  --tk-shadow-glow:0 0 30px rgba(99,102,241,.15);
  --tk-transition:all .25s cubic-bezier(.4,0,.2,1);
  --tk-gradient:linear-gradient(135deg,#6366f1 0%,#8b5cf6 50%,#a78bfa 100%);
  --tk-gradient-warm:linear-gradient(135deg,#f59e0b 0%,#ef4444 100%);
  --tk-gradient-cool:linear-gradient(135deg,#06b6d4 0%,#3b82f6 100%);
  --tk-gradient-green:linear-gradient(135deg,#10b981 0%,#059669 100%);
  --tk-gradient-pink:linear-gradient(135deg,#ec4899 0%,#8b5cf6 100%);
  --tk-glass:rgba(255,255,255,.08); --tk-glass-border:rgba(255,255,255,.12);
}
[data-theme="dark"]{
  --tk-body-bg:#020617;
  --tk-card-bg:#0f172a;
  --tk-border:#1e293b;
  --tk-text:#e2e8f0;
  --tk-text-muted:#94a3b8;
}
*,*::before,*::after{box-sizing:border-box}
body{font-family:"Vazirmatn","Tahoma","Arial",system-ui,-apple-system,sans-serif;background:var(--tk-body-bg);color:var(--tk-text);line-height:1.7;-webkit-font-smoothing:antialiased;overflow-x:hidden}
.tk-app-main{min-height:calc(100vh - 180px);background:linear-gradient(180deg,rgba(255,255,255,.6) 0%,var(--tk-body-bg) 100%);}
a{color:var(--tk-primary);text-decoration:none;transition:var(--tk-transition)}
a:hover{color:var(--tk-primary-dark)}
::selection{background:var(--tk-primary);color:#fff}

/* ── SVG Icons ── */
.tk-icon{width:1.15em;height:1.15em;fill:currentColor;vertical-align:-.15em;flex-shrink:0}
.tk-icon-sm{width:.95em;height:.95em} .tk-icon-lg{width:1.5em;height:1.5em}
.tk-icon-xl{width:2em;height:2em} .tk-icon-2xl{width:2.5em;height:2.5em}

/* ── Page Loader ── */
#tk-loader{position:fixed;top:0;left:0;width:100%;height:3px;z-index:9999;pointer-events:none}
#tk-loader .bar{height:100%;background:var(--tk-gradient);width:0;border-radius:0 2px 2px 0;animation:tk-load 1s ease forwards}
@keyframes tk-load{0%{width:0}60%{width:80%}100%{width:100%;opacity:0}}
.tk-page-loader{position:fixed;inset:0;z-index:12000;background:rgba(2,6,23,.78);backdrop-filter:blur(6px);display:flex;align-items:center;justify-content:center;transition:opacity .35s ease,visibility .35s ease}
.tk-page-loader.hide{opacity:0;visibility:hidden}
.tk-page-loader .dot{width:11px;height:11px;border-radius:50%;background:#818cf8;display:inline-block;animation:tkDot 1s infinite ease-in-out}
.tk-page-loader .dot:nth-child(2){animation-delay:.15s}.tk-page-loader .dot:nth-child(3){animation-delay:.3s}
@keyframes tkDot{0%,80%,100%{transform:scale(.5);opacity:.35}40%{transform:scale(1);opacity:1}}
.tk-theme-toggle{position:fixed;left:14px;bottom:14px;z-index:12001;border:1px solid var(--tk-border);background:var(--tk-card-bg);color:var(--tk-text);border-radius:999px;padding:.45rem .75rem;font-size:.78rem;font-weight:700;box-shadow:var(--tk-shadow-md)}

/* ── Navbar ── */
.tk-navbar{background:var(--tk-gradient);padding:.6rem 0;box-shadow:0 4px 24px rgba(99,102,241,.3);position:sticky;top:0;z-index:1030;backdrop-filter:blur(12px)}
.tk-navbar .navbar-brand{color:#fff;font-weight:800;font-size:1.2rem;letter-spacing:-.5px}
.tk-navbar .navbar-brand:hover{color:rgba(255,255,255,.9)}
.tk-navbar .nav-link{color:rgba(255,255,255,.82);font-weight:500;font-size:.85rem;padding:.45rem .75rem;border-radius:var(--tk-radius-sm);transition:var(--tk-transition)}
.tk-navbar .nav-link:hover,.tk-navbar .nav-link:focus{color:#fff;background:rgba(255,255,255,.12)}
.tk-navbar .dropdown-menu{border:none;border-radius:var(--tk-radius);box-shadow:var(--tk-shadow-lg);padding:.4rem;min-width:220px;animation:tk-dropdown .2s ease}
.tk-navbar .dropdown-item{border-radius:var(--tk-radius-sm);padding:.45rem .7rem;font-size:.85rem}
.tk-navbar .dropdown-item:hover{background:var(--tk-primary-light);color:var(--tk-primary)}
.tk-navbar .dropdown-item.active{background:var(--tk-primary);color:#fff}
.tk-navbar .navbar-toggler{border-color:rgba(255,255,255,.3)}
.tk-navbar .navbar-toggler-icon{filter:brightness(0) invert(1)}
@keyframes tk-dropdown{from{opacity:0;transform:translateY(-8px)}to{opacity:1;transform:translateY(0)}}

/* Workspace Chip */
.tk-ws-chip{display:inline-flex;align-items:center;gap:.35rem;background:rgba(255,255,255,.15);padding:.25rem .7rem;border-radius:50px;font-size:.8rem;font-weight:600;color:#fff;border:1px solid rgba(255,255,255,.2)}
.tk-ws-dot{width:7px;height:7px;background:var(--tk-success);border-radius:50%;animation:tk-pulse-dot 2s infinite}
@keyframes tk-pulse-dot{0%,100%{opacity:1}50%{opacity:.4}}

/* Notification Bell */
.tk-notif-bell{position:relative;cursor:pointer}
.tk-notif-bell .tk-notif-count{position:absolute;top:-4px;right:-4px;min-width:16px;height:16px;border-radius:8px;background:var(--tk-danger);color:#fff;font-size:.65rem;font-weight:700;line-height:16px;text-align:center;padding:0 3px;animation:tk-bounce .4s ease}
@keyframes tk-bounce{0%{transform:scale(0)}50%{transform:scale(1.3)}100%{transform:scale(1)}}

/* ── Stat Cards ── */
.tk-stat-card{background:var(--tk-card-bg);border-radius:var(--tk-radius);padding:1.25rem;box-shadow:var(--tk-shadow);border:1px solid var(--tk-border);transition:var(--tk-transition);position:relative;overflow:hidden}
.tk-stat-card:hover{box-shadow:var(--tk-shadow-md);transform:translateY(-4px)}
.tk-stat-card .tk-stat-icon{width:48px;height:48px;border-radius:var(--tk-radius-sm);display:flex;align-items:center;justify-content:center}
.tk-stat-card .tk-stat-value{font-size:1.85rem;font-weight:800;line-height:1.2}
.tk-stat-card .tk-stat-label{font-size:.8rem;color:var(--tk-text-muted);font-weight:500}
.tk-stat-card::after{content:"";position:absolute;top:0;right:0;width:4px;height:100%;border-radius:4px 0 0 4px}
.tk-stat-card.stat-primary::after{background:var(--tk-primary)} .tk-stat-card.stat-success::after{background:var(--tk-success)}
.tk-stat-card.stat-warning::after{background:var(--tk-warning)} .tk-stat-card.stat-danger::after{background:var(--tk-danger)}
.tk-stat-card.stat-info::after{background:var(--tk-info)}

/* Gradient Stat */
.tk-stat-gradient{border-radius:var(--tk-radius);padding:1.25rem;color:#fff;box-shadow:var(--tk-shadow);transition:var(--tk-transition);position:relative;overflow:hidden}
.tk-stat-gradient:hover{transform:translateY(-4px);box-shadow:var(--tk-shadow-lg)}
.tk-stat-gradient::before{content:"";position:absolute;top:-50%;right:-50%;width:100%;height:100%;background:radial-gradient(circle,rgba(255,255,255,.12) 0%,transparent 70%);border-radius:50%}
.tk-stat-gradient .tk-stat-value{font-size:2rem;font-weight:900;position:relative}
.tk-stat-gradient .tk-stat-label{font-size:.82rem;opacity:.85;position:relative}

/* ── Cards ── */
.tk-card{background:var(--tk-card-bg);border-radius:var(--tk-radius);border:1px solid var(--tk-border);box-shadow:var(--tk-shadow);overflow:hidden;transition:var(--tk-transition)}
.tk-card:hover{box-shadow:var(--tk-shadow-md)}
.tk-card-header{padding:.9rem 1.2rem;border-bottom:1px solid var(--tk-border);background:linear-gradient(180deg,#fafbfc,#f8fafc);display:flex;align-items:center;justify-content:space-between}
.tk-card-header h2,.tk-card-header h3{margin:0;font-size:.92rem;font-weight:700}
.tk-card-body{padding:1.2rem}

/* ── List Items ── */
.tk-list-item{padding:.8rem 1.2rem;border-bottom:1px solid #f1f5f9;display:flex;align-items:center;justify-content:space-between;transition:var(--tk-transition);cursor:default}
.tk-list-item:last-child{border-bottom:none}
.tk-list-item:hover{background:linear-gradient(90deg,#f8fafc,transparent)}
.tk-list-item a{color:inherit;text-decoration:none}

/* ── Badges ── */
.tk-badge{display:inline-flex;align-items:center;gap:.25rem;padding:.2rem .6rem;border-radius:50px;font-size:.72rem;font-weight:600;line-height:1.5}
.tk-badge-primary{background:var(--tk-primary-light);color:var(--tk-primary)}
.tk-badge-success{background:#dcfce7;color:#15803d} .tk-badge-warning{background:#fef3c7;color:#b45309}
.tk-badge-danger{background:#fee2e2;color:#dc2626} .tk-badge-secondary{background:#f1f5f9;color:var(--tk-secondary)}
.tk-badge-info{background:#e0f2fe;color:#0369a1}

/* ── Buttons ── */
.tk-btn{display:inline-flex;align-items:center;gap:.35rem;font-weight:600;font-size:.85rem;padding:.5rem 1.1rem;border-radius:var(--tk-radius-sm);border:none;cursor:pointer;transition:var(--tk-transition);text-decoration:none;position:relative;overflow:hidden}
.tk-btn::after{content:"";position:absolute;inset:0;background:rgba(255,255,255,.15);opacity:0;transition:opacity .2s}
.tk-btn:hover::after{opacity:1}
.tk-btn:active{transform:scale(.97)}
.tk-btn-primary{background:var(--tk-primary);color:#fff}
.tk-btn-primary:hover{background:var(--tk-primary-dark);color:#fff;box-shadow:0 4px 16px rgba(99,102,241,.35);transform:translateY(-1px)}
.tk-btn-gradient{background:var(--tk-gradient);color:#fff;font-weight:700}
.tk-btn-gradient:hover{box-shadow:var(--tk-shadow-glow);color:#fff;transform:translateY(-2px)}
.tk-btn-outline{background:transparent;color:var(--tk-primary);border:1.5px solid var(--tk-primary)}
.tk-btn-outline:hover{background:var(--tk-primary);color:#fff}
.tk-btn-ghost{background:transparent;color:var(--tk-text-muted)}
.tk-btn-ghost:hover{background:#f1f5f9;color:var(--tk-text)}
.tk-btn-sm{font-size:.78rem;padding:.35rem .75rem}
.tk-btn-lg{font-size:1rem;padding:.7rem 1.6rem}
.tk-btn-white{background:#fff;color:var(--tk-primary);font-weight:700}
.tk-btn-white:hover{box-shadow:0 8px 25px rgba(0,0,0,.15);transform:translateY(-2px);color:var(--tk-primary-dark)}

/* ── Forms ── */
.tk-form-control{border:1.5px solid var(--tk-border);border-radius:var(--tk-radius-sm);padding:.55rem .85rem;font-size:.87rem;transition:var(--tk-transition);background:#fff;font-family:inherit}
.tk-form-control:focus{border-color:var(--tk-primary);box-shadow:0 0 0 3px rgba(99,102,241,.12);outline:none}
.form-control:focus,.form-select:focus{border-color:var(--tk-primary);box-shadow:0 0 0 3px rgba(99,102,241,.12)}

/* ── Page Header ── */
.tk-page-header{margin-bottom:1.5rem;display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:.75rem}
.tk-page-header h1{font-size:1.35rem;font-weight:800;margin:0;display:flex;align-items:center;gap:.4rem}
.tk-page-header .tk-breadcrumb{font-size:.82rem;color:var(--tk-text-muted)}

/* ── CSS Charts ── */
.tk-chart-bar{display:flex;align-items:flex-end;gap:8px;height:130px;padding-top:8px;margin-bottom:28px}
.tk-chart-bar .bar{flex:1;border-radius:6px 6px 0 0;transition:height .6s cubic-bezier(.4,0,.2,1);position:relative;min-width:20px;cursor:default}
.tk-chart-bar .bar:hover{opacity:.85;filter:brightness(1.1)}
.tk-chart-bar .bar .bar-label{position:absolute;bottom:-22px;left:50%;transform:translateX(-50%);font-size:.65rem;color:var(--tk-text-muted);white-space:nowrap}
.tk-chart-bar .bar .bar-value{position:absolute;top:-20px;left:50%;transform:translateX(-50%);font-size:.72rem;font-weight:700;color:var(--tk-text)}
/* Progress bars */
.tk-progress{height:8px;background:#e2e8f0;border-radius:4px;overflow:hidden}
.tk-progress-bar{height:100%;border-radius:4px;transition:width .8s cubic-bezier(.4,0,.2,1)}

/* ── Tables ── */
.tk-table{width:100%;border-collapse:collapse;font-size:.87rem}
.tk-table thead th{padding:.7rem 1rem;background:linear-gradient(180deg,#f8fafc,#f1f5f9);border-bottom:2px solid var(--tk-border);font-weight:700;color:var(--tk-text-muted);font-size:.78rem;text-align:right;white-space:nowrap}
.tk-table tbody td{padding:.7rem 1rem;border-bottom:1px solid #f1f5f9;vertical-align:middle}
.tk-table tbody tr{transition:var(--tk-transition)}
.tk-table tbody tr:hover{background:linear-gradient(90deg,#f8fafc,transparent)}

/* ── Workspace Cards ── */
.tk-ws-card{background:var(--tk-card-bg);border-radius:var(--tk-radius);border:2px solid var(--tk-border);padding:1.25rem;transition:var(--tk-transition);display:block;text-decoration:none;color:var(--tk-text)}
.tk-ws-card:hover{border-color:var(--tk-primary);box-shadow:var(--tk-shadow-glow);transform:translateY(-4px);color:var(--tk-text)}
.tk-ws-card.active{border-color:var(--tk-primary);background:var(--tk-primary-light)}
.tk-ws-icon{width:44px;height:44px;border-radius:var(--tk-radius-sm);background:var(--tk-primary-light);color:var(--tk-primary);display:flex;align-items:center;justify-content:center;margin-bottom:.75rem}

/* ── Chat / Timeline ── */
.tk-chat{display:flex;flex-direction:column;gap:.75rem;padding:1rem}
.tk-chat-msg{display:flex;gap:.75rem;max-width:85%;animation:tk-fadein .3s ease both}
.tk-chat-msg.self{margin-right:auto;flex-direction:row}
.tk-chat-msg.other{margin-left:auto;flex-direction:row-reverse}
.tk-chat-avatar{width:36px;height:36px;border-radius:50%;display:flex;align-items:center;justify-content:center;font-weight:700;font-size:.75rem;flex-shrink:0;color:#fff}
.tk-chat-bubble{padding:.65rem 1rem;border-radius:var(--tk-radius);font-size:.88rem;line-height:1.7;position:relative;box-shadow:var(--tk-shadow)}
.tk-chat-msg.self .tk-chat-bubble{background:var(--tk-primary-light);color:var(--tk-text);border-bottom-right-radius:var(--tk-radius-xs)}
.tk-chat-msg.other .tk-chat-bubble{background:var(--tk-primary);color:#fff;border-bottom-left-radius:var(--tk-radius-xs)}
.tk-chat-meta{font-size:.7rem;color:var(--tk-text-muted);margin-top:.25rem;display:flex;align-items:center;gap:.35rem}
.tk-chat-msg.other .tk-chat-meta{color:rgba(255,255,255,.6);justify-content:flex-end}
.tk-chat-internal{opacity:.75;border:1px dashed var(--tk-warning)}
.tk-chat-event{text-align:center;font-size:.78rem;color:var(--tk-text-muted);padding:.5rem;position:relative}
.tk-chat-event::before,.tk-chat-event::after{content:"";position:absolute;top:50%;height:1px;background:var(--tk-border);width:calc(50% - 80px)}
.tk-chat-event::before{left:0} .tk-chat-event::after{right:0}
.tk-chat-event span{background:var(--tk-body-bg);padding:0 .75rem;position:relative}
.tk-chat-attachments{display:flex;flex-wrap:wrap;gap:.5rem;margin-top:.5rem}
.tk-chat-img{width:100px;height:100px;border-radius:var(--tk-radius-sm);object-fit:cover;cursor:pointer;transition:var(--tk-transition);border:2px solid var(--tk-border)}
.tk-chat-img:hover{border-color:var(--tk-primary);transform:scale(1.05)}

/* ── Lightbox ── */
.tk-lightbox{position:fixed;inset:0;background:rgba(0,0,0,.85);z-index:9999;display:none;align-items:center;justify-content:center;backdrop-filter:blur(8px);animation:tk-fadein .3s ease}
.tk-lightbox.show{display:flex}
.tk-lightbox img{max-width:90vw;max-height:85vh;border-radius:var(--tk-radius);box-shadow:0 24px 80px rgba(0,0,0,.4)}
.tk-lightbox-close{position:absolute;top:1.5rem;left:1.5rem;width:40px;height:40px;border-radius:50%;background:rgba(255,255,255,.15);border:none;color:#fff;font-size:1.2rem;cursor:pointer;display:flex;align-items:center;justify-content:center}
.tk-lightbox-close:hover{background:rgba(255,255,255,.25)}

/* ── Tour Overlay ── */
.tk-tour-overlay{position:fixed;inset:0;background:rgba(0,0,0,.55);z-index:10000;display:none;backdrop-filter:blur(4px)}
.tk-tour-overlay.show{display:block}
.tk-tour-tooltip{position:fixed;z-index:10001;background:#fff;border-radius:var(--tk-radius);padding:1.25rem;box-shadow:var(--tk-shadow-lg);max-width:340px;animation:tk-scale .3s ease}
.tk-tour-tooltip h4{font-size:.95rem;font-weight:700;margin-bottom:.4rem}
.tk-tour-tooltip p{font-size:.82rem;color:var(--tk-text-muted);margin:0}
.tk-tour-dots{display:flex;gap:.35rem;margin-top:.75rem}
.tk-tour-dots .dot{width:8px;height:8px;border-radius:50%;background:#e2e8f0}
.tk-tour-dots .dot.active{background:var(--tk-primary)}

/* ── Empty State ── */
.tk-empty{padding:2.5rem 1rem;text-align:center;color:var(--tk-text-muted)}
.tk-empty svg{width:48px;height:48px;opacity:.3;margin-bottom:.75rem}
.tk-empty p{font-size:.88rem;margin:0}

/* ── Placeholder Page ── */
.tk-placeholder{text-align:center;padding:4rem 1rem}
.tk-placeholder-icon{width:80px;height:80px;border-radius:50%;margin:0 auto 1.5rem;display:flex;align-items:center;justify-content:center}

/* ── Animations ── */
@keyframes tk-fadein{from{opacity:0;transform:translateY(12px)}to{opacity:1;transform:translateY(0)}}
@keyframes tk-fadein-up{from{opacity:0;transform:translateY(20px)}to{opacity:1;transform:translateY(0)}}
@keyframes tk-scale{from{opacity:0;transform:scale(.92)}to{opacity:1;transform:scale(1)}}
@keyframes tk-float{0%,100%{transform:translateY(0)}50%{transform:translateY(-12px)}}
@keyframes tk-shimmer{0%{background-position:-200% 0}100%{background-position:200% 0}}
@keyframes tk-spin{from{transform:rotate(0)}to{transform:rotate(360deg)}}
.tk-animate{animation:tk-fadein .5s cubic-bezier(.4,0,.2,1) both}
.tk-animate-delay-1{animation-delay:.06s} .tk-animate-delay-2{animation-delay:.12s}
.tk-animate-delay-3{animation-delay:.18s} .tk-animate-delay-4{animation-delay:.24s}
.tk-animate-delay-5{animation-delay:.30s} .tk-animate-delay-6{animation-delay:.36s}
.tk-animate-scale{animation:tk-scale .4s cubic-bezier(.4,0,.2,1) both}
.tk-float{animation:tk-float 3s ease-in-out infinite}

/* ── Login/Register ── */
.tk-auth-wrapper{min-height:100vh;display:flex;align-items:center;justify-content:center;position:relative;overflow:hidden}
.tk-auth-bg{position:absolute;inset:0;background:var(--tk-gradient);z-index:0}
.tk-auth-bg::before{content:"";position:absolute;top:-30%;right:-20%;width:600px;height:600px;background:radial-gradient(circle,rgba(255,255,255,.08) 0%,transparent 70%);border-radius:50%;animation:tk-float 8s ease-in-out infinite}
.tk-auth-bg::after{content:"";position:absolute;bottom:-20%;left:-10%;width:400px;height:400px;background:radial-gradient(circle,rgba(255,255,255,.05) 0%,transparent 70%);border-radius:50%;animation:tk-float 6s ease-in-out infinite reverse}
.tk-auth-particles{position:absolute;inset:0;overflow:hidden;z-index:1}
.tk-auth-particles span{position:absolute;width:4px;height:4px;background:rgba(255,255,255,.2);border-radius:50%;animation:tk-particle-float linear infinite}
@keyframes tk-particle-float{0%{transform:translateY(100vh) rotate(0);opacity:0}10%{opacity:1}90%{opacity:1}100%{transform:translateY(-10vh) rotate(720deg);opacity:0}}
.tk-auth-card{width:100%;max-width:440px;background:var(--tk-card-bg);border-radius:var(--tk-radius);box-shadow:var(--tk-shadow-lg);overflow:hidden;position:relative;z-index:2}
.tk-auth-header{background:transparent;padding:2rem;text-align:center;color:#fff;position:relative;background:var(--tk-gradient)}
.tk-auth-header h1{font-size:1.4rem;font-weight:800;margin-bottom:.15rem}
.tk-auth-body{padding:2rem}
.tk-auth-tabs{display:flex;border-bottom:2px solid var(--tk-border);margin-bottom:1.25rem}
.tk-auth-tabs .tab{flex:1;padding:.65rem;text-align:center;font-weight:600;font-size:.85rem;color:var(--tk-text-muted);cursor:pointer;border-bottom:2px solid transparent;margin-bottom:-2px;transition:var(--tk-transition)}
.tk-auth-tabs .tab.active{color:var(--tk-primary);border-bottom-color:var(--tk-primary)}
.tk-auth-tabs .tab:hover{color:var(--tk-text)}
.tk-captcha-box{background:#f8fafc;border:1px solid var(--tk-border);border-radius:var(--tk-radius-sm);padding:.75rem;display:flex;align-items:center;gap:.75rem}
.tk-captcha-img{background:var(--tk-dark);color:#fff;padding:.5rem 1rem;border-radius:var(--tk-radius-xs);font-size:1.1rem;font-weight:800;letter-spacing:4px;font-family:monospace;user-select:none}

/* ── Hero (Landing) ── */
.tk-hero{min-height:100vh;display:flex;align-items:center;background:var(--tk-gradient);color:#fff;position:relative;overflow:hidden}
.tk-hero::before{content:"";position:absolute;top:-50%;left:-50%;width:200%;height:200%;background:radial-gradient(circle at 30% 50%,rgba(255,255,255,.07) 0%,transparent 60%);animation:tk-drift 12s ease-in-out infinite alternate}
.tk-hero::after{content:"";position:absolute;bottom:-30%;right:-20%;width:600px;height:600px;background:radial-gradient(circle,rgba(255,255,255,.04) 0%,transparent 70%);border-radius:50%;animation:tk-float 8s ease-in-out infinite}
@keyframes tk-drift{0%{transform:translate(0,0) rotate(0)}100%{transform:translate(3%,3%) rotate(1deg)}}
.tk-hero h1{font-size:2.8rem;font-weight:900;line-height:1.3}
.tk-hero-subtitle{font-size:1.05rem;opacity:.85;max-width:500px}
.tk-hero-features{list-style:none;padding:0;margin:1.5rem 0 0}
.tk-hero-features li{display:flex;align-items:center;gap:.5rem;margin-bottom:.5rem;font-size:.92rem;opacity:.9}
.tk-hero-card{background:rgba(255,255,255,.08);border:1px solid rgba(255,255,255,.15);border-radius:var(--tk-radius);padding:1.75rem;backdrop-filter:blur(12px);transition:var(--tk-transition)}
.tk-hero-card:hover{background:rgba(255,255,255,.12);transform:translateY(-4px)}

/* ── Sections ── */
.tk-section{padding:5rem 0} .tk-section-alt{background:#fff}
.tk-section-title{font-size:1.8rem;font-weight:800;text-align:center;margin-bottom:.5rem}
.tk-section-subtitle{font-size:1rem;color:var(--tk-text-muted);text-align:center;margin-bottom:3rem}
.tk-feature-card{background:var(--tk-card-bg);border-radius:var(--tk-radius);padding:1.75rem;border:1px solid var(--tk-border);transition:var(--tk-transition);height:100%}
.tk-feature-card:hover{box-shadow:var(--tk-shadow-md);transform:translateY(-5px);border-color:var(--tk-primary)}
.tk-feature-icon{width:52px;height:52px;border-radius:var(--tk-radius-sm);display:flex;align-items:center;justify-content:center;margin-bottom:1rem}

/* ── Footer ── */
.tk-footer{background:var(--tk-dark);color:rgba(255,255,255,.6);padding:3rem 0 1.5rem}
.tk-footer h5{color:#fff;font-size:.95rem;font-weight:600;margin-bottom:1rem}
.tk-footer a{color:rgba(255,255,255,.5);transition:var(--tk-transition)}
.tk-footer a:hover{color:#fff}
.tk-footer .tk-footer-bottom{border-top:1px solid rgba(255,255,255,.08);margin-top:2rem;padding-top:1.5rem;display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;font-size:.82rem}

/* ── Profile ── */
.tk-profile-header{background:var(--tk-gradient);border-radius:var(--tk-radius);padding:2rem;color:#fff;position:relative;overflow:hidden;margin-bottom:1.5rem}
.tk-profile-header::before{content:"";position:absolute;top:-50%;right:-30%;width:400px;height:400px;background:radial-gradient(circle,rgba(255,255,255,.08) 0%,transparent 70%);border-radius:50%}
.tk-profile-avatar{width:80px;height:80px;border-radius:50%;background:rgba(255,255,255,.2);display:flex;align-items:center;justify-content:center;font-size:2rem;font-weight:800;border:3px solid rgba(255,255,255,.4)}

/* ── DateTime Widget ── */
.tk-datetime{display:flex;align-items:center;gap:.5rem;font-size:.82rem;color:var(--tk-text-muted);background:var(--tk-card-bg);padding:.4rem .8rem;border-radius:50px;border:1px solid var(--tk-border)}

/* ── TK Modal (Custom modal system) ── */
.tk-modal-backdrop{display:none;position:fixed;inset:0;background:rgba(0,0,0,.45);z-index:1300;backdrop-filter:blur(3px)}
.tk-modal-backdrop.open{display:block;animation:tkFadeIn .2s ease}
@keyframes tkFadeIn{from{opacity:0}to{opacity:1}}
.tk-modal{display:none;position:fixed;top:50%;left:50%;transform:translate(-50%,-48%);
  z-index:1400;background:#fff;border-radius:16px;box-shadow:0 20px 60px rgba(0,0,0,.25);
  width:min(560px,96vw);max-height:90vh;overflow-y:auto;flex-direction:column}
.tk-modal.open{display:flex;animation:tkModalIn .22s cubic-bezier(.4,0,.2,1)}
@keyframes tkModalIn{from{opacity:0;transform:translate(-50%,-44%)}to{opacity:1;transform:translate(-50%,-48%)}}
.tk-modal-header{display:flex;align-items:center;justify-content:space-between;padding:16px 20px;border-bottom:1px solid rgba(0,0,0,.07);flex-shrink:0}
.tk-modal-title{font-weight:700;font-size:1rem}
.tk-modal-close{background:none;border:none;font-size:1.1rem;cursor:pointer;color:#6c757d;padding:4px 8px;border-radius:6px;transition:background .15s}
.tk-modal-close:hover{background:#f1f3f5;color:#333}
.tk-modal-body{padding:20px;flex:1}
.tk-modal-footer{padding:12px 20px;border-top:1px solid rgba(0,0,0,.07);display:flex;justify-content:flex-end;gap:8px;flex-shrink:0}

/* ── Responsive ── */
@media(max-width:768px){
  .tk-hero h1{font-size:1.7rem}
  .tk-stat-card .tk-stat-value,.tk-stat-gradient .tk-stat-value{font-size:1.35rem}
  .tk-section{padding:3rem 0} .tk-section-title{font-size:1.4rem}
  .tk-chat-msg{max-width:95%}
}