/* ===== CSS Variables / Themes ===== */
:root,
[data-theme="dark"] {
  --bg: #1e1e2e;
  --bg-header: #181825;
  --text: #cdd6f4;
  --text-muted: #6c7086;
  --prompt-user: #a6e3a1;
  --prompt-at: #cdd6f4;
  --prompt-host: #89b4fa;
  --prompt-path: #cba6f7;
  --accent: #f9e2af;
  --link: #89dceb;
  --error: #f38ba8;
  --success: #a6e3a1;
  --warning: #f9e2af;
  --btn-close: #f38ba8;
  --btn-minimize: #f9e2af;
  --btn-maximize: #a6e3a1;
  --selection: rgba(137, 180, 250, 0.3);
  --scrollbar: #45475a;
  --border: #313244;
}

[data-theme="hacker"] {
  --bg: #0a0a0a;
  --bg-header: #0f0f0f;
  --text: #00ff41;
  --text-muted: #008f11;
  --prompt-user: #00ff41;
  --prompt-at: #00ff41;
  --prompt-host: #00ff41;
  --prompt-path: #00cc33;
  --accent: #39ff14;
  --link: #00ff41;
  --error: #ff0040;
  --success: #00ff41;
  --warning: #ffff00;
  --btn-close: #ff0040;
  --btn-minimize: #ffff00;
  --btn-maximize: #00ff41;
  --selection: rgba(0, 255, 65, 0.2);
  --scrollbar: #1a3a1a;
  --border: #1a3a1a;
}

[data-theme="light"] {
  --bg: #eff1f5;
  --bg-header: #e6e9ef;
  --text: #4c4f69;
  --text-muted: #9ca0b0;
  --prompt-user: #40a02b;
  --prompt-at: #4c4f69;
  --prompt-host: #1e66f5;
  --prompt-path: #8839ef;
  --accent: #df8e1d;
  --link: #04a5e5;
  --error: #d20f39;
  --success: #40a02b;
  --warning: #df8e1d;
  --btn-close: #d20f39;
  --btn-minimize: #df8e1d;
  --btn-maximize: #40a02b;
  --selection: rgba(30, 102, 245, 0.2);
  --scrollbar: #bcc0cc;
  --border: #ccd0da;
}

/* ===== Reset & Base ===== */
*, *::before, *::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

::selection {
  background: var(--selection);
}

body {
  background: #11111b;
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 100vh;
  font-family: 'Nanum Gothic Coding', 'Cascadia Code', 'Fira Code', 'JetBrains Mono', 'Consolas', monospace;
  padding: 20px;
}

/* ===== Terminal Container ===== */
#terminal {
  width: 100%;
  max-width: 1200px;
  height: 90vh;
  background: var(--bg);
  border-radius: 12px;
  overflow: hidden;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5);
  display: flex;
  flex-direction: column;
  border: 1px solid var(--border);
}

/* ===== Terminal Header (Title Bar) ===== */
#terminal-header {
  background: var(--bg-header);
  padding: 12px 16px;
  display: flex;
  align-items: center;
  user-select: none;
  border-bottom: 1px solid var(--border);
  flex-shrink: 0;
}

.buttons {
  display: flex;
  gap: 8px;
}

.buttons span {
  width: 13px;
  height: 13px;
  border-radius: 50%;
  display: inline-block;
}

.btn-close { background: var(--btn-close); }
.btn-minimize { background: var(--btn-minimize); }
.btn-maximize { background: var(--btn-maximize); }

#terminal-header .title {
  flex: 1;
  text-align: center;
  color: var(--text-muted);
  font-size: 13px;
}

#terminal-header .spacer {
  width: 55px;
}

/* ===== Terminal Body ===== */
#terminal-body {
  flex: 1;
  padding: 20px;
  overflow-y: auto;
  color: var(--text);
  font-size: 14px;
  line-height: 1.6;
  scrollbar-width: thin;
  scrollbar-color: var(--scrollbar) transparent;
}

#terminal-body::-webkit-scrollbar {
  width: 6px;
}

#terminal-body::-webkit-scrollbar-track {
  background: transparent;
}

#terminal-body::-webkit-scrollbar-thumb {
  background: var(--scrollbar);
  border-radius: 3px;
}

/* ===== Output Area ===== */
#output .line {
  margin-bottom: 2px;
  white-space: pre-wrap;
  word-wrap: break-word;
}

#output .cmd-line {
  margin-top: 8px;
  margin-bottom: 4px;
}

#output .cmd-line .prompt {
  color: var(--prompt-user);
}

#output .cmd-line .cmd-text {
  color: var(--text);
}

/* ===== Prompt Styling ===== */
.prompt {
  color: var(--prompt-user);
  margin-right: 8px;
  white-space: nowrap;
}

.prompt .user { color: var(--prompt-user); }
.prompt .at { color: var(--prompt-at); }
.prompt .host { color: var(--prompt-host); }
.prompt .path { color: var(--prompt-path); }

/* ===== Input Line ===== */
#input-line {
  display: flex;
  align-items: center;
  margin-top: 8px;
}

#command-input {
  flex: 1;
  background: transparent;
  border: none;
  outline: none;
  color: var(--text);
  font-family: inherit;
  font-size: inherit;
  caret-color: var(--accent);
  line-height: 1.6;
}

/* ===== Output Formatting ===== */
.ascii-art {
  color: var(--accent);
  font-size: 12px;
  line-height: 1.2;
  white-space: pre;
  overflow-x: auto;
  font-family: 'Cascadia Code', 'Fira Code', 'JetBrains Mono', 'Consolas', 'Courier New', monospace;
}

.ascii-hacker {
  color: var(--prompt-user);
  font-size: 11px;
  line-height: 1.1;
  white-space: pre;
  font-family: 'Cascadia Code', 'Fira Code', 'JetBrains Mono', 'Consolas', 'Courier New', monospace;
}

/* ===== Welcome 2-Column Layout ===== */
.welcome-container {
  display: flex;
  gap: 16px;
  align-items: flex-start;
}

.welcome-left {
  flex: 1;
  min-width: 0;
}

.welcome-left .ascii-art {
  font-size: clamp(6px, 1.1vw, 12px);
  line-height: 1.15;
  overflow-x: hidden;
}

.welcome-right {
  flex-shrink: 0;
}

.welcome-right .ascii-art {
  color: var(--prompt-user);
  font-size: clamp(6px, 1vw, 11px);
  line-height: 1.15;
}

.welcome-msg {
  margin: 4px 0;
}

.welcome-msg .version {
  color: var(--text-muted);
}

.divider {
  color: var(--text-muted);
  margin: 4px 0;
}

.help-row {
  display: flex;
  gap: 8px;
  padding: 2px 0;
}

.help-cmd {
  color: var(--accent);
  min-width: 120px;
  font-weight: bold;
}

.help-desc {
  color: var(--text-muted);
}

.section-title {
  color: var(--accent);
  font-weight: bold;
  margin: 8px 0 4px;
  font-size: 15px;
}

.info-label {
  color: var(--prompt-host);
  min-width: 100px;
  display: inline-block;
}

.info-value {
  color: var(--text);
}

.skill-category {
  color: var(--prompt-host);
  font-weight: bold;
  margin-top: 6px;
}

.skill-items {
  color: var(--text);
  padding-left: 16px;
}

.skill-item {
  color: var(--text);
  padding-left: 16px;
  line-height: 1.5;
}

.project-name {
  color: var(--accent);
  font-weight: bold;
}

.project-desc {
  color: var(--text-muted);
  padding-left: 16px;
}

.project-tech {
  color: var(--prompt-path);
  padding-left: 16px;
  font-size: 12px;
}

.project-link a,
.social-link a {
  color: var(--link);
  text-decoration: none;
}

.project-link a:hover,
.social-link a:hover {
  text-decoration: underline;
}

.social-row {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 3px 0;
}

.social-icon {
  color: var(--accent);
  min-width: 20px;
  text-align: center;
}

.social-name {
  color: var(--prompt-host);
  min-width: 100px;
}

.edu-name {
  color: var(--accent);
  font-weight: bold;
}

.edu-detail {
  color: var(--text-muted);
  padding-left: 16px;
}

.error-msg {
  color: var(--error);
}

.success-msg {
  color: var(--success);
}

.warning-msg {
  color: var(--warning);
}

.hint {
  color: var(--text-muted);
  font-style: italic;
}

.tab-suggestion {
  color: var(--text-muted);
}

/* ===== Animations ===== */
@keyframes blink {
  0%, 100% { opacity: 1; }
  50% { opacity: 0; }
}

#command-input:focus {
  caret-color: var(--accent);
}

/* ===== Responsive ===== */

/* Tablet */
@media (max-width: 768px) {
  body {
    padding: 0;
  }

  #terminal {
    max-width: 100%;
    height: 100vh;
    height: 100dvh;
    border-radius: 0;
    border: none;
  }

  #terminal-body {
    padding: 12px;
    font-size: 13px;
  }

  .welcome-left .ascii-art {
    font-size: clamp(5px, 2vw, 9px);
  }

  .welcome-right .ascii-art {
    font-size: clamp(5px, 1.5vw, 8px);
  }

  .help-cmd {
    min-width: 90px;
  }
}

/* Mobile */
@media (max-width: 480px) {
  #terminal-body {
    padding: 10px;
    font-size: 12px;
  }

  .welcome-container {
    flex-direction: column;
  }

  /* 로고 95자 기준: (뷰포트 - 패딩20px) / 58 ≈ 맞는 폰트 사이즈 */
  .welcome-left .ascii-art {
    font-size: calc((100vw - 24px) / 58);
  }

  .welcome-right {
    align-self: center;
  }

  .welcome-right .ascii-art {
    font-size: calc((100vw - 24px) / 75);
  }

  .prompt {
    font-size: 11px;
    margin-right: 4px;
  }

  #command-input {
    font-size: 12px;
  }

  .help-cmd {
    min-width: 70px;
    font-size: 12px;
  }

  .info-label {
    min-width: 70px;
  }
}

/* Very small screens */
@media (max-width: 360px) {
  .welcome-right {
    display: none;
  }
}