/* =====================================================
   Monolith Portfolio — Theme Variables & Component Styles
   ===================================================== */

/* ---------- HTML Scroll Behavior ---------- */
html {
  scroll-padding-top: 84px;
}

/* ---------- Theme Variables — Light (Monolith Resume) ---------- */
:root {
  --color-surface: #f9f9f9;
  --color-surface-dim: #dadada;
  --color-surface-bright: #f9f9f9;
  --color-surface-container-lowest: #ffffff;
  --color-surface-container-low: #f3f3f4;
  --color-surface-container: #eeeeee;
  --color-surface-container-high: #e8e8e8;
  --color-surface-container-highest: #e2e2e2;
  --color-on-surface: #1a1c1c;
  --color-on-surface-variant: #4c4546;
  --color-inverse-surface: #2f3131;
  --color-inverse-on-surface: #f0f1f1;
  --color-outline: #7e7576;
  --color-outline-variant: #cfc4c5;
  --color-surface-tint: #5e5e5e;
  --color-primary: #000000;
  --color-on-primary: #ffffff;
  --color-primary-container: #1b1b1b;
  --color-on-primary-container: #848484;
  --color-inverse-primary: #c6c6c6;
  --color-secondary: #5e5e5e;
  --color-on-secondary: #ffffff;
  --color-secondary-container: #e4e2e2;
  --color-on-secondary-container: #646464;
  --color-tertiary: #000000;
  --color-on-tertiary: #ffffff;
  --color-tertiary-container: #1b1b1b;
  --color-on-tertiary-container: #848484;
  --color-error: #ba1a1a;
  --color-on-error: #ffffff;
  --color-error-container: #ffdad6;
  --color-on-error-container: #93000a;
  --color-primary-fixed: #e2e2e2;
  --color-primary-fixed-dim: #c6c6c6;
  --color-on-primary-fixed: #1b1b1b;
  --color-on-primary-fixed-variant: #474747;
  --color-secondary-fixed: #e4e2e2;
  --color-secondary-fixed-dim: #c8c6c6;
  --color-on-secondary-fixed: #1b1c1c;
  --color-on-secondary-fixed-variant: #474747;
  --color-tertiary-fixed: #e2e2e2;
  --color-tertiary-fixed-dim: #c6c6c6;
  --color-on-tertiary-fixed: #1b1b1b;
  --color-on-tertiary-fixed-variant: #474747;
  --color-background: #f9f9f9;
  --color-on-background: #1a1c1c;
  --color-surface-variant: #e2e2e2;
  --color-subtle-surface: #F4F4F4;
  --color-border-muted: #E5E5E5;
  --color-text-tertiary: #737373;

  /* Light typography — all Inter */
  --font-display-lg: 'Inter';
  --font-headline-md: 'Inter';
  --font-body-md: 'Inter';
  --font-label-caps: 'Inter';
  --font-caption: 'Inter';

  --font-size-display-lg: 48px;
  --lh-display-lg: 1.1;
  --ls-display-lg: -0.04em;
  --font-size-display-lg-mobile: 32px;
  --lh-display-lg-mobile: 1.2;
  --ls-display-lg-mobile: -0.02em;
  --font-size-headline-md: 18px;
  --lh-headline-md: 24px;
  --ls-headline-md: -0.01em;
  --font-size-body-md: 15px;
  --lh-body-md: 24px;
  --ls-body-md: 0px;
  --font-size-label-caps: 13px;
  --lh-label-caps: 16px;
  --ls-label-caps: 0.1em;
  --font-size-caption: 13px;
  --lh-caption: 20px;

  /* Light radii — soft 4px */
  --radius-default: 0.25rem;
  --radius-sm: 0.125rem;
  --radius-md: 0.375rem;
  --radius-lg: 0.5rem;
  --radius-xl: 0.75rem;

  /* Light — section header divider color */
  --divider-color: #E5E5E5;
}

/* ---------- Theme Variables — Dark (Monolith Dark) ---------- */
.dark {
  --color-surface: #141313;
  --color-surface-dim: #141313;
  --color-surface-bright: #3a3939;
  --color-surface-container-lowest: #0e0e0e;
  --color-surface-container-low: #1c1b1b;
  --color-surface-container: #201f1f;
  --color-surface-container-high: #2a2a2a;
  --color-surface-container-highest: #353434;
  --color-on-surface: #e5e2e1;
  --color-on-surface-variant: #c4c7c8;
  --color-inverse-surface: #e5e2e1;
  --color-inverse-on-surface: #313030;
  --color-outline: #8e9192;
  --color-outline-variant: #444748;
  --color-surface-tint: #c6c6c7;
  --color-primary: #ffffff;
  --color-on-primary: #2f3131;
  --color-primary-container: #e2e2e2;
  --color-on-primary-container: #636565;
  --color-inverse-primary: #5d5f5f;
  --color-secondary: #c7c6c6;
  --color-on-secondary: #2f3131;
  --color-secondary-container: #484949;
  --color-on-secondary-container: #b8b8b8;
  --color-tertiary: #ffffff;
  --color-on-tertiary: #2f3131;
  --color-tertiary-container: #e2e2e2;
  --color-on-tertiary-container: #636565;
  --color-error: #ffb4ab;
  --color-on-error: #690005;
  --color-error-container: #93000a;
  --color-on-error-container: #ffdad6;
  --color-primary-fixed: #e2e2e2;
  --color-primary-fixed-dim: #c6c6c7;
  --color-on-primary-fixed: #1a1c1c;
  --color-on-primary-fixed-variant: #454747;
  --color-secondary-fixed: #e3e2e2;
  --color-secondary-fixed-dim: #c7c6c6;
  --color-on-secondary-fixed: #1a1c1c;
  --color-on-secondary-fixed-variant: #464747;
  --color-tertiary-fixed: #e2e2e2;
  --color-tertiary-fixed-dim: #c6c6c7;
  --color-on-tertiary-fixed: #1a1c1c;
  --color-on-tertiary-fixed-variant: #454747;
  --color-background: #141313;
  --color-on-background: #e5e2e1;
  --color-surface-variant: #353434;
  --color-subtle-surface: #201f1f;
  --color-border-muted: #444748;
  --color-text-tertiary: #8e9192;

  /* Dark typography — same as light (all Inter) */
  --font-display-lg: 'Inter';
  --font-headline-md: 'Inter';
  --font-body-md: 'Inter';
  --font-label-caps: 'Inter';
  --font-caption: 'Inter';

  --font-size-display-lg: 48px;
  --lh-display-lg: 1.1;
  --ls-display-lg: -0.04em;
  --font-size-display-lg-mobile: 32px;
  --lh-display-lg-mobile: 1.2;
  --ls-display-lg-mobile: -0.02em;
  --font-size-headline-md: 18px;
  --lh-headline-md: 24px;
  --ls-headline-md: -0.01em;
  --font-size-body-md: 15px;
  --lh-body-md: 24px;
  --ls-body-md: 0px;
  --font-size-label-caps: 13px;
  --lh-label-caps: 16px;
  --ls-label-caps: 0.1em;
  --font-size-caption: 13px;
  --lh-caption: 20px;

  /* Dark radii — same as light (soft 4px) */
  --radius-default: 0.25rem;
  --radius-sm: 0.125rem;
  --radius-md: 0.375rem;
  --radius-lg: 0.5rem;
  --radius-xl: 0.75rem;

  --divider-color: #444748;
}

/* ---------- Base Styles ---------- */
.material-symbols-outlined {
    font-variation-settings: 'FILL' 0, 'wght' 400, 'GRAD' 0, 'opsz' 24;
    font-size: 1.25rem;
}

.link-underlined {
    text-decoration: none;
    border-bottom: 1px solid var(--color-text-tertiary);
    transition: opacity 0.2s;
}
.link-underlined:hover { opacity: 0.7; }

::selection {
    background-color: var(--color-primary-fixed);
    color: var(--color-on-primary-fixed);
}

/* Theme transition overlay (covers instant switch so background/content transition together) */
.theme-overlay {
  position: fixed;
  inset: 0;
  z-index: 9999;
  pointer-events: none;
  background: #141313;
  animation: theme-fade-out 1.1s ease-out forwards;
}
@keyframes theme-fade-out {
  0%   { opacity: 1; }
  30%  { opacity: 0.85; }
  60%  { opacity: 0.4; }
  100% { opacity: 0; }
}

/* ---------- Components ---------- */

/* Skill chips */
.skill-chip {
    display: inline-flex;
    padding: 4px 12px;
    background: var(--color-subtle-surface);
    color: var(--color-on-surface);
    font-size: 13px;
    line-height: 20px;
    border-radius: var(--radius-default);
    font-family: var(--font-caption);
}

/* Section header divider line */
.section-divider {
    height: 1px;
    flex: 1;
    background: var(--divider-color);
}

/* Certificate card */
.cert-card {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1.25rem;
    background: var(--color-subtle-surface);
    border: 1px solid var(--color-border-muted);
    border-radius: var(--radius-default);
}

/* Theme toggle icon visibility */
#theme-toggle .dark-icon { display: none; }
.dark #theme-toggle .dark-icon { display: inline; }
.dark #theme-toggle .light-icon { display: none; }

/* Toggle switch knob slide */
#theme-toggle input:checked ~ div > span {
  transform: translateX(20px);
}

/* Mobile theme toggle - lightbulb icon */
#theme-toggle .lightbulb-icon {
  font-variation-settings: 'FILL' 1, 'wght' 400;
  color: #facc15;
}
.dark #theme-toggle .lightbulb-icon {
  font-variation-settings: 'FILL' 0, 'wght' 300;
  color: var(--color-on-surface-variant);
}

/* Resume entry spacing */
.resume-entry + .resume-entry { margin-top: 2.5rem; }

/* Styled list with theme-aware markers */
.styled-list {
    list-style: none;
    padding-left: 1.25rem;
}
.styled-list li {
    position: relative;
    padding-left: 0.75rem;
    margin-bottom: 0.5rem;
    font-family: var(--font-body-md);
    font-size: var(--font-size-body-md);
    line-height: var(--lh-body-md);
    color: var(--color-on-surface);
}
.styled-list li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0.6em;
    width: 6px;
    height: 6px;
    background: var(--color-primary);
    border-radius: var(--radius-default);
}
.dark .styled-list li::before { border-radius: 0; }

/* Project card */
.project-card {
    padding: 1.5rem;
    background: var(--color-subtle-surface);
    border: 1px solid var(--color-border-muted);
    border-radius: var(--radius-default);
    transition: border-color 0.2s;
}
.project-card:hover { border-color: var(--color-primary); }

/* CTA box */
.cta-box {
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    padding: 1.5rem;
    background: var(--color-surface-container-high);
    border: 1px solid transparent;
    border-radius: var(--radius-default);
}

/* Header scroll shadow */
header { transition: box-shadow 0.2s; }
header.shadow-scroll { box-shadow: 0 1px 3px rgba(0,0,0,0.08); }
.dark header.shadow-scroll { box-shadow: 0 1px 3px rgba(0,0,0,0.5); }

/* Nav link active state */
.nav-link {
    color: var(--color-secondary);
    text-decoration: none;
    font-family: var(--font-body-md);
    font-size: var(--font-size-body-md);
    transition: color 0.2s;
}
.nav-link:hover { color: var(--color-primary); }
.nav-link.active {
    color: var(--color-primary);
    font-weight: 600;
    border-bottom: 1px solid var(--color-primary);
    padding-bottom: 2px;
}

/* Tag meta */
.tag-meta {
    font-size: 11px;
    font-weight: 700;
    color: var(--color-on-surface);
    opacity: 0.6;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    font-family: var(--font-label-caps);
}

/* Responsive font size adjustment */
@media (max-width: 768px) {
  :root { --font-size-display-lg: 32px; }
  .dark { --font-size-display-lg: 36px; }
}