/* =========================================
   ১. গ্লোবাল সেটিংস এবং ভেরিয়েবল (রং)
   ========================================= */
* { 
  margin: 0; 
  padding: 0; 
  box-sizing: border-box;
}

html { 
  scroll-behavior: smooth; /* স্মুথ স্ক্রলিং এর জন্য */
}

/* লাইট মোডের ডিফল্ট রং (Light Mode) */
:root {
  --paper: #eef1f6;
  --paper-deep: #e3e8f1;
  --card: #ffffff;
  --ink: #101b2d;          /* মূল টেক্সট কালার */
  --ink-soft: #55637f;     /* হালকা টেক্সট কালার */
  --ink-faint: #8592a8;
  --accent: #ff5a2b;       /* হাইলাইট বা একসেন্ট কালার (কমলা) */
  --accent-soft: rgba(255, 90, 43, 0.12);
  --stamp: #1f8c6b;        /* স্ট্যাম্প কালার (সবুজ) */
  --line: rgba(16, 27, 45, 0.16);
  --line-soft: rgba(16, 27, 45, 0.08);
  --shadow: 0 20px 45px rgba(16, 27, 45, 0.08);
  --radius: 4px;
}

/* ডার্ক মোডের রং (Dark Mode) - বাটন ক্লিক করলে এগুলো актив হবে */
[data-theme="dark"] {
  --paper: #0f1115;
  --paper-deep: #161920;
  --card: #1a1d24;
  --ink: #f0f2f5;          /* ডার্ক মোডে টেক্সট সাদা হবে */
  --ink-soft: #9ca3af;
  --ink-faint: #6b7280;
  --accent: #ff7b54;       /* ডার্ক মোডে একটু উজ্জ্বল কমলা */
  --accent-soft: rgba(255, 123, 84, 0.15);
  --stamp: #34d399;
  --line: rgba(255, 255, 255, 0.1);   /* ডার্ক মোডে বর্ডার হালকা সাদা */
  --line-soft: rgba(255, 255, 255, 0.05);
  --shadow: 0 20px 45px rgba(0, 0, 0, 0.4);
}

body {
  font-family: "IBM Plex Sans", Arial, sans-serif;
  /* গ্রিড পেপারের মতো ব্যাকগ্রাউন্ড ইফেক্ট */
  background:
    linear-gradient(var(--line-soft) 1px, transparent 1px),
    linear-gradient(90deg, var(--line-soft) 1px, transparent 1px),
    var(--paper);
  background-size: 32px 32px, 32px 32px, auto;
  color: var(--ink);
  line-height: 1.65;
  font-size: 16px;
  transition: background 0.3s ease, color 0.3s ease; /* স্মুথ থিম চেঞ্জ */
}

a { color: inherit; text-decoration: none; }
.mono { font-family: "IBM Plex Mono", monospace; }

.container {
  width: min(1160px, 92%);
  margin: 0 auto;
}

.section-gap { padding: 88px 0; }

/* =========================================
   ২. কার্ড এবং প্লেট ডিজাইন (Reusable)
   ========================================= */
.plate {
  position: relative;
  background: var(--card);
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
  border-radius: var(--radius);
  transition: border-color 0.2s, transform 0.2s;
}

.plate:hover {
  border-color: var(--accent);
  transform: translateY(-2px);
}

.plate-ref {
  position: absolute;
  top: -1px;
  left: -1px;
  background: var(--ink);
  color: var(--paper);
  font-family: "IBM Plex Mono", monospace;
  font-size: 10px;
  font-weight: 600;
  letter-spacing: 0.6px;
  padding: 4px 8px;
  border-radius: 0 0 4px 0;
}

/* =========================================
   ৩. হেডার এবং নেভিগেশন বার
   ========================================= */
.header {
  position: sticky;
  top: 0;
  z-index: 999;
  background: rgba(238, 241, 246, 0.85); /* লাইট মোড ব্যাকগ্রাউন্ড */
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line);
  transition: background 0.3s ease;
}

/* ডার্ক মোডে হেডারের ব্যাকগ্রাউন্ড */
[data-theme="dark"] .header {
  background: rgba(15, 17, 21, 0.85);
}

.navbar {
  min-height: 72px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 20px;
}

.logo {
  color: var(--ink);
  font-family: "IBM Plex Mono", monospace;
  font-size: 19px;
  font-weight: 600;
  letter-spacing: 0.5px;
}
.logo span { color: var(--accent); }

.nav-list {
  list-style: none;
  display: flex;
  gap: 4px;
  flex-wrap: wrap;
  align-items: center;
}

.nav-list a {
  display: inline-block;
  padding: 8px 13px;
  color: var(--ink-soft);
  font-family: "IBM Plex Mono", monospace;
  font-size: 12.5px;
  font-weight: 500;
  letter-spacing: 0.3px;
  text-transform: uppercase;
  border-radius: 3px;
  transition: 0.2s;
}

.nav-list a:hover {
  color: var(--ink);
  background: var(--accent-soft);
}

/* ডার্ক মোড টগল বাটন স্টাইল */
.theme-btn {
  background: var(--card);
  border: 1px solid var(--line);
  color: var(--ink);
  font-family: "IBM Plex Mono", monospace;
  font-size: 12px;
  font-weight: 600;
  padding: 8px 14px;
  border-radius: 3px;
  cursor: pointer;
  transition: all 0.2s;
  margin-left: 8px;
}

.theme-btn:hover {
  border-color: var(--accent);
  color: var(--accent);
}

/* =========================================
   ৪. হিরো সেকশন (প্রথম অংশ)
   ========================================= */
.hero {
  min-height: calc(100vh - 72px);
  display: flex;
  align-items: center;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 50px;
  align-items: center;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: "IBM Plex Mono", monospace;
  font-size: 12.5px;
  font-weight: 600;
  letter-spacing: 1px;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 20px;
}

.eyebrow::before {
  content: "";
  width: 22px;
  height: 1px;
  background: var(--accent);
}

.hero h1 {
  font-family: "Space Grotesk", sans-serif;
  font-size: clamp(40px, 5.6vw, 68px);
  font-weight: 700;
  line-height: 1.05;
  letter-spacing: -1.5px;
  color: var(--ink);
  margin-bottom: 16px;
}

.hero h2 {
  font-family: "IBM Plex Mono", monospace;
  color: var(--ink-soft);
  font-size: 15px;
  font-weight: 500;
  margin-bottom: 22px;
}

.hero-desc {
  max-width: 620px;
  color: var(--ink-soft);
  font-size: 17px;
  margin-bottom: 32px;
}

.hero-buttons {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
  margin-bottom: 34px;
}

.btn {
  display: inline-flex;
  justify-content: center;
  align-items: center;
  min-height: 48px;
  padding: 0 24px;
  border-radius: 3px;
  font-family: "IBM Plex Mono", monospace;
  font-size: 13.5px;
  font-weight: 600;
  letter-spacing: 0.3px;
  transition: 0.2s;
  border: 1px solid transparent;
}

.btn-primary {
  color: #fff;
  background: var(--ink);
}
.btn-primary:hover { background: var(--accent); }

.btn-secondary {
  color: var(--ink);
  border-color: var(--line);
  background: transparent;
}
.btn-secondary:hover { border-color: var(--ink); }

.tech-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.tech-row span {
  color: var(--ink-soft);
  font-family: "IBM Plex Mono", monospace;
  font-size: 12.5px;
  font-weight: 500;
  padding: 6px 11px;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 3px;
}

/* =========================================
   ৫. হিরো ভিজ্যুয়াল (ডান পাশের বক্স)
   ========================================= */
.titleblock {
  background: var(--card);
  border: 1.5px solid var(--ink);
  box-shadow: var(--shadow);
}

.tb-head {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 16px 20px;
  border-bottom: 1.5px solid var(--ink);
  background: var(--ink);
}

.tb-head .tb-logo {
  font-family: "IBM Plex Mono", monospace;
  color: var(--paper);
  font-weight: 600;
  font-size: 13px;
  letter-spacing: 1px;
}

.tb-head .tb-tag {
  font-family: "IBM Plex Mono", monospace;
  color: var(--accent);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.8px;
  text-transform: uppercase;
}

.tb-avatar {
  padding: 30px 20px 20px;
  text-align: center;
  border-bottom: 1px dashed var(--line);
}

.tb-avatar-ring {
  width: 108px;
  height: 108px;
  margin: 0 auto 14px;
  display: grid;
  place-items: center;
  border: 2px solid var(--ink);
  border-radius: 50%;
  position: relative;
}

.tb-avatar-ring::before {
  content: "";
  position: absolute;
  inset: -8px;
  border: 1px dashed var(--line);
  border-radius: 50%;
}

.tb-avatar-ring span {
  font-family: "Space Grotesk", sans-serif;
  font-size: 34px;
  font-weight: 700;
  color: var(--ink);
}

.tb-avatar h3 {
  font-family: "Space Grotesk", sans-serif;
  font-size: 18px;
  letter-spacing: -0.3px;
  margin-bottom: 4px;
  color: var(--ink);
}

.tb-avatar p {
  font-family: "IBM Plex Mono", monospace;
  font-size: 12px;
  color: var(--ink-soft);
}

.tb-rows { padding: 6px 20px 18px; }

.tb-row {
  display: flex;
  justify-content: space-between;
  gap: 10px;
  padding: 11px 0;
  border-bottom: 1px solid var(--line-soft);
  font-size: 13px;
}
.tb-row:last-child { border-bottom: none; }

.tb-row dt {
  font-family: "IBM Plex Mono", monospace;
  color: var(--ink-faint);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.5px;
  text-transform: uppercase;
  white-space: nowrap;
}

.tb-row dd {
  color: var(--ink);
  font-weight: 500;
  text-align: right;
}

/* =========================================
   ৬. স্ট্যাটস / রুলার সেকশন
   ========================================= */
.ruler {
  border-top: 1px dashed var(--line);
  border-bottom: 1px dashed var(--line);
  background: var(--paper-deep);
}

.ruler-track {
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 28px;
  padding: 30px 0;
}

.tick {
  flex: 1;
  min-width: 140px;
  position: relative;
  padding-top: 16px;
}

.tick::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 1px;
  height: 10px;
  background: var(--accent);
}

.tick strong {
  display: block;
  font-family: "Space Grotesk", sans-serif;
  font-size: 27px;
  font-weight: 700;
  color: var(--ink);
  line-height: 1.1;
}

.tick span {
  display: block;
  font-family: "IBM Plex Mono", monospace;
  font-size: 12px;
  color: var(--ink-soft);
  margin-top: 4px;
}

/* =========================================
   ৭. সেকশন হেডিং এবং About
   ========================================= */
.section-title {
  max-width: 680px;
  margin: 0 0 44px;
}
.section-title .eyebrow { margin-bottom: 10px; }
.section-title h2 {
  font-family: "Space Grotesk", sans-serif;
  font-size: clamp(28px, 3.4vw, 42px);
  font-weight: 700;
  letter-spacing: -1px;
  line-height: 1.15;
  color: var(--ink);
}

.about-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 20px;
}

.plate-pad { padding: 32px; }

.about-main h3, .small-card h3, .skill-card h3, 
.project-card h3, .timeline-content h3 {
  font-family: "Space Grotesk", sans-serif;
  font-weight: 700;
  color: var(--ink);
  margin-bottom: 12px;
  letter-spacing: -0.3px;
}
.about-main h3 { font-size: 22px; }

.about-main p, .small-card p, .skill-card p, 
.project-card > p, .timeline-content p {
  color: var(--ink-soft);
  font-size: 15px;
}
.about-main p + p { margin-top: 14px; }

.about-cards { display: grid; gap: 16px; }
.small-card { padding: 24px; }

.small-card .tag {
  display: inline-block;
  font-family: "IBM Plex Mono", monospace;
  font-size: 11px;
  font-weight: 600;
  color: var(--accent);
  background: var(--accent-soft);
  padding: 3px 8px;
  border-radius: 3px;
  margin-bottom: 12px;
  letter-spacing: 0.4px;
}

/* Skills এবং Projects গ্রিড */
.skills-grid, .projects-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
}

.skill-card, .project-card { padding: 26px; }
.project-card { display: flex; flex-direction: column; }
.featured { grid-column: span 2; }

.skill-tag {
  display: inline-block;
  font-family: "IBM Plex Mono", monospace;
  font-size: 13px;
  font-weight: 600;
  color: var(--card);
  background: var(--ink);
  padding: 5px 10px;
  border-radius: 3px;
  margin-bottom: 18px;
  letter-spacing: 0.3px;
}

.project-top {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 40px;
}
.project-top span {
  font-family: "IBM Plex Mono", monospace;
  color: var(--accent);
  font-weight: 600;
  font-size: 12px;
  letter-spacing: 0.5px;
  text-transform: uppercase;
}
.project-top p {
  font-family: "IBM Plex Mono", monospace;
  color: var(--ink-faint);
  font-size: 12px;
}

/* Journey Section */
.timeline {
  max-width: 820px;
  display: grid;
  gap: 18px;
}

.timeline-item {
  display: grid;
  grid-template-columns: 74px 1fr;
  gap: 18px;
  align-items: start;
}

.rev-marker {
  font-family: "IBM Plex Mono", monospace;
  font-size: 13px;
  font-weight: 600;
  color: var(--ink);
  background: var(--paper-deep);
  border: 1px solid var(--line);
  border-radius: 3px;
  text-align: center;
  padding: 9px 0;
}

.timeline-content { padding: 22px 24px; }

/*Contact Section */
.contact-card {
  display: grid;
  grid-template-columns: 0.95fr 1.05fr;
  gap: 0;
  overflow: hidden;
}

.contact-intro {
  padding: 40px;
  position: relative;
}

.contact-intro h2 {
  font-family: "Space Grotesk", sans-serif;
  font-size: clamp(28px, 3.4vw, 40px);
  font-weight: 700;
  letter-spacing: -1px;
  line-height: 1.15;
  margin-bottom: 14px;
  color: var(--ink);
}

.contact-intro p { color: var(--ink-soft); font-size: 15px; max-width: 380px; }

.stamp {
  position: absolute;
  right: 34px;
  bottom: 30px;
  width: 84px;
  height: 84px;
  border: 2px solid var(--stamp);
  border-radius: 50%;
  display: grid;
  place-items: center;
  transform: rotate(-11deg);
  opacity: 0.9;
}

.stamp span {
  font-family: "IBM Plex Mono", monospace;
  font-size: 10.5px;
  font-weight: 700;
  color: var(--stamp);
  letter-spacing: 0.5px;
  text-align: center;
  line-height: 1.4;
}

.contact-list {
  border-left: 1px solid var(--line);
  display: grid;
}

.contact-list .tb-row {
  padding: 16px 32px;
  border-bottom: 1px solid var(--line-soft);
  font-size: 14px;
}
.contact-list .tb-row:last-child { border-bottom: none; }

.contact-list dt {
  font-size: 11px;
  color: var(--ink-faint);
}

.contact-list dd {
  color: var(--ink);
  font-weight: 500;
  word-break: break-word;
}

/* Footer section*/
.footer {
  text-align: center;
  padding: 26px 20px;
  border-top: 1px dashed var(--line);
}

.footer p {
  font-family: "IBM Plex Mono", monospace;
  font-size: 12px;
  color: var(--ink-faint);
  letter-spacing: 0.3px;
}

/* Mobile frindly*/
@media (max-width: 980px) {
  .hero-grid, .about-grid, .contact-card { grid-template-columns: 1fr; }
  .contact-list { border-left: none; border-top: 1px solid var(--line); }
  .skills-grid, .projects-grid { grid-template-columns: repeat(2, 1fr); }
  .featured { grid-column: span 2; }
}

@media (max-width: 720px) {
  .navbar {
    min-height: auto;
    padding: 14px 0;
    flex-direction: column;
    align-items: flex-start;
    gap: 10px;
  }
  .nav-list { gap: 2px; width: 100%; justify-content: space-between; }
  .hero { min-height: auto; padding-top: 30px; }
  .section-gap { padding: 64px 0; }
  .hero-buttons { flex-direction: column; }
  .btn { width: 100%; }
  .ruler-track { padding: 24px 0; gap: 22px; }
  .tick { min-width: 45%; }
  .skills-grid, .projects-grid { grid-template-columns: 1fr; }
  .featured { grid-column: span 1; }
  .plate-pad, .skill-card, .project-card, .small-card { padding: 22px; }
  .timeline-item { grid-template-columns: 54px 1fr; gap: 12px; }
  .rev-marker { font-size: 11px; padding: 7px 0; }
  .stamp { position: static; margin-top: 24px; transform: rotate(-6deg); }
  .contact-intro { padding: 28px; }
}

@media (max-width: 460px) {
  .hero h1 { font-size: 34px; }
  .hero-desc { font-size: 15.5px; }
  .tb-avatar-ring { width: 88px; height: 88px; }
  .tb-avatar-ring span { font-size: 28px; }
}