/* ==========================================================================
   FinScope Quant & Research Lab — Design System
   Deep Navy + Emerald / Financial-terminal glass UI
   ========================================================================== */

:root{
  /* -- Palette -- */
  --navy-950:#060B14;
  --navy-900:#0A1220;
  --navy-800:#101B2E;
  --navy-700:#16233A;
  --emerald-500:#10B981;
  --emerald-400:#34D399;
  --emerald-700:#047857;
  --amber-400:#F5B84A;   /* secondary accent for warnings/highlights */
  --red-400:#F27C7C;     /* negative values */
  --ink-100:#EAF0F7;
  --ink-300:#B7C4D6;
  --ink-500:#7E8FA6;
  --glass-bg:rgba(16,27,46,0.62);
  --glass-border:rgba(52,211,153,0.14);
  --glass-border-strong:rgba(52,211,153,0.34);

  /* -- Type -- */
  --font-fa:'Vazirmatn', 'Segoe UI', sans-serif;
  --font-mono:'IBM Plex Mono', ui-monospace, SFMono-Regular, Menlo, monospace;

  /* -- Layout -- */
  --radius-lg:18px;
  --radius-md:12px;
  --radius-sm:8px;
  --shadow-card:0 8px 30px -12px rgba(0,0,0,0.55);
  --shadow-card-hover:0 16px 42px -14px rgba(16,185,129,0.28);
  --header-h:64px;
}

:root[data-theme="light"]{
  --navy-950:#F5F8FB;
  --navy-900:#FFFFFF;
  --navy-800:#EEF3F8;
  --navy-700:#E3EAF2;
  --glass-bg:rgba(255,255,255,0.72);
  --glass-border:rgba(4,120,87,0.16);
  --glass-border-strong:rgba(4,120,87,0.34);
  --ink-100:#0E1B2C;
  --ink-300:#3B4B60;
  --ink-500:#67788D;
  --shadow-card:0 8px 26px -14px rgba(16,40,60,0.18);
  --shadow-card-hover:0 16px 36px -14px rgba(16,150,110,0.22);
}

*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
html[dir="rtl"] body{font-family:var(--font-fa)}

body{
  background:var(--navy-950);
  color:var(--ink-100);
  font-family:var(--font-fa);
  line-height:1.7;
  min-height:100vh;
  transition:background .25s ease,color .25s ease;
}

.mono{font-family:var(--font-mono);direction:ltr;unicode-bidi:plaintext}

a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
button{font-family:inherit;cursor:pointer}
input,select,textarea{font-family:inherit}

/* -- Skip link / a11y -- */
.skip-link{position:absolute;top:-48px;inset-inline-start:12px;background:var(--emerald-500);color:#04140F;padding:10px 16px;border-radius:var(--radius-sm);z-index:999;transition:top .2s}
.skip-link:focus{top:12px}

:focus-visible{outline:2px solid var(--emerald-400);outline-offset:2px}

@media (prefers-reduced-motion: reduce){
  *,*::before,*::after{animation-duration:0.001ms !important;animation-iteration-count:1 !important;transition-duration:0.001ms !important;scroll-behavior:auto !important}
}

/* ==========================================================================
   Live background canvas (continuous, no timeout)
   ========================================================================== */

.live-bg-wrap{position:absolute;inset:0;z-index:0;overflow:hidden;pointer-events:none}
.live-bg-wrap canvas{display:block;width:100%;height:100%}
.live-bg-wrap::after{
  content:'';position:absolute;inset:0;
  background:radial-gradient(ellipse 80% 65% at 50% 0%, transparent 25%, var(--navy-950) 92%);
}

/* ==========================================================================
   Scroll reveal utility
   ========================================================================== */

[data-reveal]{opacity:0;transform:translateY(22px);transition:opacity .6s cubic-bezier(.16,1,.3,1),transform .6s cubic-bezier(.16,1,.3,1)}
[data-reveal].is-visible{opacity:1;transform:translateY(0)}

/* ==========================================================================
   Button ripple + shimmer
   ========================================================================== */

.btn{position:relative;overflow:hidden}
.btn-primary::before{
  content:'';position:absolute;inset:0;
  background:linear-gradient(115deg,transparent 30%,rgba(255,255,255,.35) 50%,transparent 70%);
  transform:translateX(-120%);transition:transform .6s ease;
}
.btn-primary:hover::before{transform:translateX(120%)}
.btn-ripple{
  position:absolute;width:10px;height:10px;border-radius:50%;
  background:rgba(255,255,255,.55);transform:translate(-50%,-50%) scale(0);
  animation:btnRipple .55s ease-out forwards;pointer-events:none;
}
@keyframes btnRipple{to{transform:translate(-50%,-50%) scale(18);opacity:0}}

/* ==========================================================================
   Card cursor-glow spotlight
   ========================================================================== */

.card, .fm-card, .panel{position:relative}
.card::before, .fm-card::before, .panel::before{
  content:'';position:absolute;inset:0;border-radius:inherit;opacity:0;
  background:radial-gradient(220px circle at var(--mx,50%) var(--my,50%), rgba(52,211,153,.14), transparent 70%);
  transition:opacity .35s ease;pointer-events:none;
}
.card:hover::before, .fm-card:hover::before, .panel:hover::before{opacity:1}

/* ==========================================================================
   Layout shell
   ========================================================================== */

.container{max-width:1220px;margin-inline:auto;padding-inline:20px}

.site-header{
  position:sticky;top:0;z-index:50;height:var(--header-h);
  display:flex;align-items:center;
  background:rgba(6,11,20,0.72);backdrop-filter:blur(14px);
  border-bottom:1px solid var(--glass-border);
}
:root[data-theme="light"] .site-header{background:rgba(255,255,255,0.78)}

.site-header .container{display:flex;align-items:center;justify-content:space-between;gap:24px;width:100%}

.brand{display:flex;align-items:center;gap:10px;font-weight:800;font-size:1.05rem;letter-spacing:.2px}
.brand .mark{
  width:30px;height:30px;border-radius:9px;
  background:linear-gradient(135deg,var(--emerald-400),var(--emerald-700));
  display:flex;align-items:center;justify-content:center;font-family:var(--font-mono);
  font-size:.8rem;color:#04140F;font-weight:800;
}
.brand small{display:block;font-weight:500;color:var(--ink-500);font-size:.68rem;margin-top:1px}

.nav-links{display:flex;align-items:center;gap:22px;font-size:.92rem;color:var(--ink-300)}
.nav-links a:hover{color:var(--emerald-400)}

.header-actions{display:flex;align-items:center;gap:10px}

.theme-toggle{
  width:38px;height:38px;border-radius:50%;border:1px solid var(--glass-border);
  background:var(--glass-bg);display:flex;align-items:center;justify-content:center;
  color:var(--ink-300);transition:border-color .2s,color .2s;
}
.theme-toggle:hover{border-color:var(--glass-border-strong);color:var(--emerald-400)}

.lang-toggle{
  width:38px;height:38px;border-radius:50%;border:1px solid var(--glass-border);
  background:var(--glass-bg);display:flex;align-items:center;justify-content:center;
  color:var(--ink-300);font-family:var(--font-mono);font-size:.68rem;font-weight:700;
  transition:border-color .2s,color .2s;
}
.lang-toggle:hover{border-color:var(--glass-border-strong);color:var(--emerald-400)}

.back-finscope{
  font-size:.8rem;color:var(--ink-500);white-space:nowrap;padding:0 4px;
  transition:color .2s;
}
.back-finscope:hover{color:var(--emerald-400)}

.hamburger{display:none;background:none;border:0;color:var(--ink-100);font-size:1.4rem}

@media (max-width:860px){
  .nav-links{
    display:none;position:fixed;inset:var(--header-h) 0 0 0;z-index:60;
    flex-direction:column;align-items:flex-start;gap:2px;padding:18px 20px;
    background:var(--navy-900);border-top:1px solid var(--glass-border);overflow-y:auto;
  }
  .nav-links.is-open{display:flex}
  .nav-links a{width:100%;padding:13px 4px;border-bottom:1px solid var(--glass-border);font-size:1rem}
  .hamburger{display:block}
  .back-finscope{display:none}
}

/* ==========================================================================
   Buttons
   ========================================================================== */

.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:11px 20px;border-radius:var(--radius-md);font-weight:700;font-size:.92rem;
  border:1px solid transparent;transition:transform .15s ease,box-shadow .2s ease,border-color .2s;
}
.btn:active{transform:translateY(1px)}
.btn-primary{background:linear-gradient(135deg,var(--emerald-400),var(--emerald-700));color:#04140F;box-shadow:0 8px 22px -10px rgba(16,185,129,0.55)}
.btn-primary:hover{box-shadow:0 12px 28px -10px rgba(16,185,129,0.7)}
.btn-ghost{background:var(--glass-bg);border-color:var(--glass-border);color:var(--ink-100)}
.btn-ghost:hover{border-color:var(--glass-border-strong)}

/* ==========================================================================
   Hero
   ========================================================================== */

.hero{position:relative;overflow:hidden;padding:76px 0 56px;border-bottom:1px solid var(--glass-border)}
.hero .container{position:relative;z-index:1;text-align:center;max-width:820px}

.hero-brand{margin-bottom:18px}
.hero-brand-text{
  display:inline-block;font-family:var(--font-mono);font-weight:700;letter-spacing:.5px;
  font-size:clamp(2.1rem,6vw,3.4rem);
  background:linear-gradient(100deg,var(--ink-100) 0%,var(--emerald-400) 45%,var(--emerald-500) 60%,var(--ink-100) 85%);
  background-size:220% 100%;
  -webkit-background-clip:text;background-clip:text;color:transparent;
  animation:brandSheen 6s ease-in-out infinite;
  filter:drop-shadow(0 4px 24px rgba(16,185,129,.25));
}
@keyframes brandSheen{0%{background-position:0% 50%}50%{background-position:100% 50%}100%{background-position:0% 50%}}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;font-family:var(--font-mono);
  font-size:.72rem;letter-spacing:.14em;color:var(--emerald-400);
  background:var(--glass-bg);border:1px solid var(--glass-border);
  padding:6px 14px;border-radius:999px;margin-bottom:22px;
}
.eyebrow .dot{width:6px;height:6px;border-radius:50%;background:var(--emerald-400);box-shadow:0 0 0 4px rgba(16,185,129,.18)}

.hero h1{font-size:clamp(1.9rem,4.4vw,3.1rem);font-weight:800;line-height:1.28;margin-bottom:16px}
.hero h1 span{color:var(--emerald-400)}
.hero p{color:var(--ink-300);font-size:1.05rem;max-width:620px;margin-inline:auto 26px;margin-bottom:30px}
.hero-cta{display:flex;gap:12px;justify-content:center;flex-wrap:wrap}



/* ==========================================================================
   Section / cards grid
   ========================================================================== */

.section{padding:56px 0}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:16px;margin-bottom:26px;flex-wrap:wrap}
.section-head h2{font-size:1.5rem;font-weight:800}
.section-head p{color:var(--ink-500);font-size:.92rem;margin-top:4px}

.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:16px}

.card{
  position:relative;background:var(--glass-bg);border:1px solid var(--glass-border);
  border-radius:var(--radius-lg);padding:22px;backdrop-filter:blur(10px);
  box-shadow:var(--shadow-card);transition:transform .22s ease,box-shadow .22s ease,border-color .22s ease;
  display:flex;flex-direction:column;gap:10px;
}
.card:hover{transform:translateY(-4px);box-shadow:var(--shadow-card-hover);border-color:var(--glass-border-strong)}
.card .icon{
  width:42px;height:42px;border-radius:11px;display:flex;align-items:center;justify-content:center;
  background:linear-gradient(135deg,rgba(52,211,153,.22),rgba(4,120,87,.14));
  color:var(--emerald-400);font-size:1.15rem;transition:transform .22s ease;
}
.card:hover .icon{transform:scale(1.08) translateY(-1px)}
.card h3{font-size:1.02rem;font-weight:700}
.card p{color:var(--ink-500);font-size:.85rem;flex:1}
.card .tags{display:flex;gap:6px;flex-wrap:wrap;margin-top:4px}
.tag{font-family:var(--font-mono);font-size:.66rem;color:var(--ink-500);border:1px solid var(--glass-border);border-radius:6px;padding:2px 8px}
.card .go{font-size:.82rem;font-weight:700;color:var(--emerald-400);display:flex;align-items:center;gap:6px}

/* ==========================================================================
   Tool page shell (calculator layout)
   ========================================================================== */

.tool-header{position:relative;overflow:hidden;padding:34px 0 8px;border-bottom:1px solid var(--glass-border)}
.tool-header .container{position:relative;z-index:1}
.breadcrumb{font-size:.78rem;color:var(--ink-500);margin-bottom:14px}
.breadcrumb a:hover{color:var(--emerald-400)}
.tool-header h1{font-size:clamp(1.5rem,3vw,2.1rem);font-weight:800;margin-bottom:8px}
.tool-header .lede{color:var(--ink-300);max-width:680px}

.tool-layout{display:grid;grid-template-columns:1.05fr 1.4fr;gap:22px;padding:32px 0;align-items:start}
@media (max-width:900px){.tool-layout{grid-template-columns:1fr}}

.panel{
  background:var(--glass-bg);border:1px solid var(--glass-border);border-radius:var(--radius-lg);
  padding:22px;box-shadow:var(--shadow-card);
}
.panel h2{font-size:1rem;font-weight:800;margin-bottom:16px;display:flex;align-items:center;gap:8px}

.field{margin-bottom:14px}
.field label{display:block;font-size:.82rem;color:var(--ink-300);margin-bottom:6px}
.field input, .field select{
  width:100%;background:var(--navy-800);border:1px solid var(--glass-border);
  border-radius:var(--radius-sm);padding:11px 12px;color:var(--ink-100);font-family:var(--font-mono);
  transition:border-color .2s;
}
.field input:focus,.field select:focus{border-color:var(--emerald-400)}
.field .hint{font-size:.74rem;color:var(--ink-500);margin-top:5px}

.result-hero{
  display:flex;flex-direction:column;align-items:center;text-align:center;gap:4px;
  padding:22px 10px;border-radius:var(--radius-md);
  background:linear-gradient(180deg,rgba(52,211,153,.08),transparent);
  border:1px solid var(--glass-border);margin-bottom:16px;
}
.result-hero .label{font-size:.78rem;color:var(--ink-500)}
.result-hero .value{font-family:var(--font-mono);font-size:2.1rem;font-weight:700;color:var(--emerald-400)}
.result-hero .value.negative{color:var(--red-400)}

.result-table{width:100%;border-collapse:collapse;font-size:.88rem}
.result-table td,.result-table th{padding:10px 8px;border-bottom:1px solid var(--glass-border);text-align:start}
.result-table th{color:var(--ink-500);font-weight:600;font-size:.78rem}
.result-table td.mono{font-weight:700}

.empty-state{color:var(--ink-500);font-size:.88rem;text-align:center;padding:30px 10px}

/* learn / accordion */
.accordion{border:1px solid var(--glass-border);border-radius:var(--radius-md);overflow:hidden;margin-top:10px}
.accordion + .accordion{margin-top:8px}
.accordion summary{
  cursor:pointer;list-style:none;padding:14px 16px;font-weight:700;font-size:.9rem;
  display:flex;justify-content:space-between;align-items:center;background:var(--navy-800);
}
.accordion summary::-webkit-details-marker{display:none}
.accordion summary::after{content:'+';color:var(--emerald-400);font-size:1.1rem}
.accordion[open] summary::after{content:'–'}
.accordion .body{padding:14px 16px;color:var(--ink-300);font-size:.88rem;line-height:1.8}

.disclaimer{
  font-size:.78rem;color:var(--ink-500);border-top:1px dashed var(--glass-border);
  margin-top:26px;padding-top:16px;
}

.related-tools{display:flex;gap:10px;flex-wrap:wrap;margin-top:10px}
.related-tools a{
  font-size:.8rem;border:1px solid var(--glass-border);border-radius:999px;padding:7px 14px;color:var(--ink-300);
}
.related-tools a:hover{border-color:var(--glass-border-strong);color:var(--emerald-400)}

/* article body inside SEO content */
.content-body h2{font-size:1.15rem;font-weight:800;margin:26px 0 10px}
.content-body p{color:var(--ink-300);margin-bottom:10px;font-size:.93rem}
.content-body ul{color:var(--ink-300);font-size:.93rem;margin:8px 0 8px 0;padding-inline-start:20px}
.content-body table{width:100%;border-collapse:collapse;margin:14px 0;font-size:.88rem}
.content-body th,.content-body td{border:1px solid var(--glass-border);padding:8px 10px;text-align:start}

/* skeleton loading */
.skeleton{background:linear-gradient(90deg,var(--navy-800) 25%,var(--navy-700) 37%,var(--navy-800) 63%);background-size:400% 100%;animation:shimmer 1.4s ease infinite;border-radius:var(--radius-sm)}
@keyframes shimmer{0%{background-position:100% 0}100%{background-position:0 0}}

/* status states */
.status-msg{display:flex;align-items:center;gap:8px;font-size:.85rem;padding:10px 14px;border-radius:var(--radius-sm);margin-bottom:14px}
.status-msg.error{background:rgba(242,124,124,.1);border:1px solid rgba(242,124,124,.35);color:var(--red-400)}
.status-msg.success{background:rgba(52,211,153,.1);border:1px solid rgba(52,211,153,.35);color:var(--emerald-400)}

/* ==========================================================================
   Footer
   ========================================================================== */

.site-footer{border-top:1px solid var(--glass-border);padding:34px 0;margin-top:40px;color:var(--ink-500);font-size:.84rem}
.site-footer .container{display:flex;justify-content:space-between;flex-wrap:wrap;gap:12px}
.site-footer a:hover{color:var(--emerald-400)}