/* ============================================================
   DIGANTOSOFT — Stylesheet
   Theme: "Horizon" — deep night sky meeting a sunrise line.
   দিগন্ত = horizon. রাতের আকাশ আর ভোরের আলো মিলে যাওয়ার রেখা।
   ============================================================ */

:root {
    /* Palette */
    --night:      #0b1020;   /* deep night sky background */
    --night-2:    #11182e;   /* raised surface */
    --night-3:    #1a2440;   /* card / border */
    --horizon-1:  #ff7a45;   /* sunrise orange */
    --horizon-2:  #ffb24d;   /* warm amber */
    --horizon-3:  #6d8bff;   /* dawn blue */
    --ink:        #eef2ff;   /* primary text */
    --ink-soft:   #9aa6c7;   /* secondary text */
    --ink-faint:  #61708f;
    --line:       rgba(255,255,255,.08);

    --shadow: 0 20px 50px -20px rgba(0,0,0,.7);
    --radius: 16px;
    --radius-sm: 10px;

    --font-display: 'Sora', sans-serif;
    --font-body: 'Inter', sans-serif;

    --maxw: 1140px;
}

* { margin: 0; padding: 0; box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
    font-family: var(--font-body);
    background: var(--night);
    color: var(--ink);
    line-height: 1.65;
    -webkit-font-smoothing: antialiased;
    overflow-x: hidden;
}

.container { max-width: var(--maxw); margin: 0 auto; padding: 0 24px; }

h1, h2, h3, h4 { font-family: var(--font-display); line-height: 1.15; font-weight: 700; letter-spacing: -.02em; }

a { color: inherit; text-decoration: none; }

img { max-width: 100%; display: block; }

/* ---------- Buttons ---------- */
.btn {
    display: inline-flex; align-items: center; gap: 8px;
    font-family: var(--font-display); font-weight: 600; font-size: 15px;
    padding: 14px 26px; border-radius: 100px; border: 1px solid transparent;
    cursor: pointer; transition: transform .2s, box-shadow .2s, background .2s;
    white-space: nowrap;
}
.btn-sm { padding: 10px 20px; font-size: 14px; }
.btn-primary {
    background: linear-gradient(100deg, var(--horizon-1), var(--horizon-2));
    color: #1a1003;
    box-shadow: 0 8px 24px -8px rgba(255,122,69,.6);
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 14px 32px -8px rgba(255,122,69,.7); }
.btn-ghost { background: transparent; border-color: var(--line); color: var(--ink); }
.btn-ghost:hover { border-color: var(--horizon-3); color: #fff; transform: translateY(-2px); }

/* ---------- Header ---------- */
.site-header {
    position: sticky; top: 0; z-index: 50;
    background: rgba(11,16,32,.72);
    backdrop-filter: blur(14px);
    border-bottom: 1px solid transparent;
    transition: border-color .3s, background .3s;
}
.site-header.scrolled { border-bottom-color: var(--line); background: rgba(11,16,32,.92); }
.header-inner { display: flex; align-items: center; justify-content: space-between; height: 72px; }

.logo { display: flex; align-items: center; gap: 11px; font-family: var(--font-display); font-weight: 800; font-size: 20px; letter-spacing: -.03em; }
.logo-img {
    width: 34px; height: 34px; border-radius: 9px; object-fit: cover;
}
.logo-text { color: var(--ink); }

.main-nav { display: flex; gap: 6px; }
.main-nav a {
    font-family: var(--font-display); font-weight: 500; font-size: 15px;
    color: var(--ink-soft); padding: 8px 16px; border-radius: 100px; transition: color .2s, background .2s;
}
.main-nav a:hover { color: var(--ink); }
.main-nav a.active { color: #fff; background: var(--night-3); }

.header-cta { margin-left: 8px; }

.nav-toggle { display: none; flex-direction: column; gap: 5px; background: none; border: none; cursor: pointer; padding: 6px; }
.nav-toggle span { width: 24px; height: 2px; background: var(--ink); border-radius: 2px; transition: .3s; }
.nav-toggle.active span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle.active span:nth-child(2) { opacity: 0; }
.nav-toggle.active span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ---------- Hero ---------- */
.hero { position: relative; padding: 100px 0 120px; overflow: hidden; }
.hero::before {
    content: ''; position: absolute; inset: 0; z-index: -1;
    background:
        radial-gradient(120% 80% at 50% 120%, rgba(255,122,69,.28), transparent 55%),
        radial-gradient(90% 60% at 80% 0%, rgba(109,139,255,.16), transparent 60%);
}
.hero-grid { display: grid; grid-template-columns: 1.15fr .85fr; gap: 60px; align-items: center; }

.eyebrow {
    display: inline-flex; align-items: center; gap: 8px;
    font-family: var(--font-display); font-size: 13px; font-weight: 600; letter-spacing: .04em; text-transform: uppercase;
    color: var(--horizon-2); padding: 7px 14px; border: 1px solid var(--line); border-radius: 100px;
    background: var(--night-2); margin-bottom: 24px;
}
.eyebrow::before { content: ''; width: 7px; height: 7px; border-radius: 50%; background: var(--horizon-1); box-shadow: 0 0 10px var(--horizon-1); }

.hero h1 { font-size: clamp(38px, 6vw, 62px); font-weight: 800; margin-bottom: 22px; }
.hero h1 .grad {
    background: linear-gradient(100deg, var(--horizon-2), var(--horizon-1) 40%, var(--horizon-3));
    -webkit-background-clip: text; background-clip: text; color: transparent;
}
.hero p.lead { font-size: 19px; color: var(--ink-soft); max-width: 520px; margin-bottom: 34px; }
.hero-actions { display: flex; gap: 14px; flex-wrap: wrap; }

.hero-panel {
    background: var(--night-2); border: 1px solid var(--line); border-radius: var(--radius);
    box-shadow: var(--shadow); overflow: hidden;
}
.hero-panel-top { display: flex; gap: 7px; padding: 14px 16px; border-bottom: 1px solid var(--line); }
.hero-panel-top span { width: 11px; height: 11px; border-radius: 50%; background: var(--night-3); }
.hero-panel-top span:first-child { background: var(--horizon-1); }
.hero-panel-body { padding: 22px; font-family: 'Courier New', monospace; font-size: 13.5px; line-height: 1.9; color: var(--ink-soft); }
.hero-panel-body .k { color: var(--horizon-3); }
.hero-panel-body .s { color: var(--horizon-2); }
.hero-panel-body .c { color: #4b5a7a; }
.hero-panel-body .f { color: var(--horizon-1); }

/* ---------- Stats strip ---------- */
.stats { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; padding: 8px 0 0; }
.stat { text-align: center; padding: 26px 16px; background: var(--night-2); border: 1px solid var(--line); border-radius: var(--radius); }
.stat .num { font-family: var(--font-display); font-size: 34px; font-weight: 800; background: linear-gradient(120deg, var(--horizon-2), var(--horizon-1)); -webkit-background-clip: text; background-clip: text; color: transparent; }
.stat .label { font-size: 14px; color: var(--ink-soft); margin-top: 4px; }

/* ---------- Sections ---------- */
section { padding: 90px 0; }
.section-head { max-width: 640px; margin-bottom: 54px; }
.section-head.center { margin-left: auto; margin-right: auto; text-align: center; }
.section-head h2 { font-size: clamp(30px, 4.5vw, 44px); margin-bottom: 16px; }
.section-head p { font-size: 18px; color: var(--ink-soft); }

/* ---------- Service / feature cards ---------- */
.card-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.card {
    background: var(--night-2); border: 1px solid var(--line); border-radius: var(--radius);
    padding: 32px 28px; transition: transform .3s, border-color .3s;
}
.card:hover { transform: translateY(-5px); border-color: rgba(255,150,77,.35); }
.card-icon {
    width: 50px; height: 50px; border-radius: 13px; display: grid; place-items: center;
    background: linear-gradient(135deg, rgba(255,122,69,.18), rgba(109,139,255,.12));
    border: 1px solid var(--line); margin-bottom: 20px;
}
.card-icon svg { width: 24px; height: 24px; stroke: var(--horizon-2); stroke-width: 1.8; fill: none; }
.card h3 { font-size: 21px; margin-bottom: 10px; }
.card p { color: var(--ink-soft); font-size: 15.5px; }

/* ---------- Work / portfolio ---------- */
.work-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 22px; }
.work-item {
    background: var(--night-2); border: 1px solid var(--line); border-radius: var(--radius);
    padding: 30px; transition: transform .3s, border-color .3s; position: relative; overflow: hidden;
}
.work-item:hover { transform: translateY(-5px); border-color: rgba(109,139,255,.4); }
.work-item .tag { display: inline-block; font-family: var(--font-display); font-size: 12px; font-weight: 600; letter-spacing: .03em; text-transform: uppercase; color: var(--horizon-2); margin-bottom: 14px; }
.work-item h3 { font-size: 23px; margin-bottom: 10px; }
.work-item p { color: var(--ink-soft); font-size: 15.5px; margin-bottom: 16px; }
.work-stack { display: flex; flex-wrap: wrap; gap: 8px; }
.work-stack span { font-size: 12.5px; color: var(--ink-soft); background: var(--night-3); padding: 5px 12px; border-radius: 100px; }

/* ---------- CTA band ---------- */
.cta-band { position: relative; overflow: hidden; border-radius: 24px; margin: 0 24px; padding: 64px 40px; text-align: center;
    background: linear-gradient(120deg, var(--night-2), var(--night-3)); border: 1px solid var(--line); }
.cta-band::before { content: ''; position: absolute; inset: 0; z-index: 0; background: radial-gradient(80% 120% at 50% 120%, rgba(255,122,69,.3), transparent 60%); }
.cta-band > * { position: relative; z-index: 1; }
.cta-band h2 { font-size: clamp(28px, 4vw, 40px); margin-bottom: 14px; }
.cta-band p { color: var(--ink-soft); font-size: 18px; max-width: 520px; margin: 0 auto 30px; }

/* ---------- Page hero (inner pages) ---------- */
.page-hero { padding: 70px 0 40px; position: relative; }
.page-hero::before { content: ''; position: absolute; inset: 0; z-index: -1; background: radial-gradient(90% 70% at 50% -10%, rgba(109,139,255,.16), transparent 60%); }
.page-hero h1 { font-size: clamp(34px, 5vw, 52px); margin-bottom: 16px; }
.page-hero p { font-size: 19px; color: var(--ink-soft); max-width: 600px; }

/* ---------- About ---------- */
.about-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 50px; align-items: start; }
.about-grid p { color: var(--ink-soft); font-size: 16.5px; margin-bottom: 18px; }
.value-list { display: flex; flex-direction: column; gap: 16px; }
.value-item { display: flex; gap: 16px; padding: 20px; background: var(--night-2); border: 1px solid var(--line); border-radius: var(--radius-sm); }
.value-item .vnum { font-family: var(--font-display); font-weight: 800; font-size: 20px; color: var(--horizon-1); flex-shrink: 0; }
.value-item h4 { font-size: 17px; margin-bottom: 4px; }
.value-item p { font-size: 14.5px; color: var(--ink-soft); margin: 0; }

/* ---------- Contact ---------- */
.contact-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 50px; }
.contact-info-item { margin-bottom: 26px; }
.contact-info-item .lbl { font-family: var(--font-display); font-size: 13px; font-weight: 600; text-transform: uppercase; letter-spacing: .04em; color: var(--horizon-2); margin-bottom: 6px; }
.contact-info-item .val { font-size: 16.5px; color: var(--ink); }

.form-field { margin-bottom: 20px; }
.form-field label { display: block; font-family: var(--font-display); font-size: 14px; font-weight: 500; margin-bottom: 8px; }
.form-field input, .form-field textarea {
    width: 100%; padding: 13px 16px; background: var(--night-2); border: 1px solid var(--line);
    border-radius: var(--radius-sm); color: var(--ink); font-family: var(--font-body); font-size: 15px; transition: border-color .2s;
}
.form-field input:focus, .form-field textarea:focus { outline: none; border-color: var(--horizon-1); }
.form-field textarea { resize: vertical; min-height: 130px; }

.alert { padding: 14px 18px; border-radius: var(--radius-sm); margin-bottom: 24px; font-size: 15px; }
.alert-success { background: rgba(80,200,120,.12); border: 1px solid rgba(80,200,120,.35); color: #7fe0a0; }
.alert-error { background: rgba(255,90,90,.1); border: 1px solid rgba(255,90,90,.3); color: #ff9b9b; }

/* ---------- Footer ---------- */
.site-footer { border-top: 1px solid var(--line); padding: 64px 0 30px; margin-top: 40px; background: var(--night-2); }
.footer-grid { display: grid; grid-template-columns: 1.6fr 1fr 1.2fr 1fr; gap: 40px; padding-bottom: 40px; border-bottom: 1px solid var(--line); }
.footer-tagline { color: var(--ink-soft); font-size: 15px; margin-top: 14px; max-width: 240px; }
.footer-col h4 { font-size: 14px; text-transform: uppercase; letter-spacing: .04em; color: var(--ink-faint); margin-bottom: 16px; font-weight: 600; }
.footer-col a { display: block; color: var(--ink-soft); font-size: 15px; margin-bottom: 10px; transition: color .2s; }
.footer-col a:hover { color: var(--ink); }
.footer-contact { color: var(--ink-soft); font-size: 15px; margin-bottom: 10px; }
.footer-bottom { display: flex; justify-content: space-between; padding-top: 24px; color: var(--ink-faint); font-size: 14px; flex-wrap: wrap; gap: 8px; }

/* ---------- Reveal animation ---------- */
.reveal { opacity: 0; transform: translateY(24px); transition: opacity .7s ease, transform .7s ease; }
.reveal.in { opacity: 1; transform: none; }

/* ---------- Responsive ---------- */
@media (max-width: 900px) {
    .hero-grid { grid-template-columns: 1fr; gap: 40px; }
    .hero-panel { max-width: 440px; }
    .about-grid, .contact-grid { grid-template-columns: 1fr; gap: 32px; }
    .card-grid { grid-template-columns: 1fr 1fr; }
    .stats { grid-template-columns: 1fr 1fr; }
    .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px; }
}
@media (max-width: 640px) {
    .main-nav {
        position: absolute; top: 72px; left: 0; right: 0; flex-direction: column; gap: 0;
        background: var(--night-2); border-bottom: 1px solid var(--line); padding: 12px 24px;
        max-height: 0; overflow: hidden; transition: max-height .3s; }
    .main-nav.open { max-height: 340px; }
    .main-nav a { padding: 13px 0; border-radius: 0; }
    .header-cta { display: none; }
    .nav-toggle { display: flex; }
    .card-grid, .work-grid { grid-template-columns: 1fr; }
    .stats { grid-template-columns: 1fr 1fr; }
    .footer-grid { grid-template-columns: 1fr; }
    section { padding: 64px 0; }
    .hero { padding: 70px 0 90px; }
}

/* reduced motion */
@media (prefers-reduced-motion: reduce) {
    * { animation: none !important; transition: none !important; }
    html { scroll-behavior: auto; }
    .reveal { opacity: 1; transform: none; }
}