/*========================
  DESIGN TOKENS
=========================*/
:root {
  /* COLORS */
  --background-gradient:
    radial-gradient(
      circle at 75% 35%,
      rgba(0, 132, 255, 0.18),
      transparent 35%
    ),
    radial-gradient(
      circle at 25% 70%,
      rgba(0, 255, 200, 0.08),
      transparent 35%
    ),
    linear-gradient(
      135deg,
      rgba(5, 9, 20, 1),
      rgba(7, 24, 45, 1) 55%,
      rgba(3, 7, 17, 1)
    );
  --background-dark: rgba(5, 9, 20, 1);
  --brand-mark-color: rgba(255, 255, 255, 1);
  --heading-color: rgba(255, 247, 232, 1);
  --text-color: rgba(255, 255, 255, 1);
  --html-color: rgba(5, 9, 20, 1);

  /*========================
  CTA COLORS
===========================*/

  /* CTA PRIMARY */
  --background-cta-primary-before: linear-gradient(
    to bottom,
    rgba(255, 255, 255, 0.35),
    transparent
  );
  --background-cta-primary: linear-gradient(
    135deg,
    rgba(227, 192, 143, 1),
    rgba(199, 159, 112, 1)
  );
  --text-color-cta-primary: rgba(5, 9, 20, 1);
  --border-cta-primary: rgba(255, 255, 255, 0.35);
  --box-shadow-cta-primary:
    inset 0 1px 0 rgba(255, 255, 255, 0.45), 0 10px 25px rgba(0, 0, 0, 0.25),
    0 0 20px rgba(0, 183, 255, 0.18);

  /* CTA SECONDARY */
  --background-cta-secondary: transparent;
  --text-color-cta-secondary: rgba(255, 255, 255);
  --border-color-cta-secondary: rgba(255, 255, 255, 0.55);
  --background-cta-secondary-hover: rgba(255, 255, 255, 0.1);
  --border-color-cta-secondary-hover: rgba(255, 255, 255, 0.8);

  /*========================
  CARD FRONT
===========================*/

  /* ACTIONFIGURE BUTTONS */
  --background-actionfigure-btn: transparent;
  --text-actionfigure-btn: transparent;

  /* DEFAULT PACKAGE BUTTON GLOW */
  --shadow-package-menu: 0 0 10px rgba(0, 183, 255, 0.35);
  --shadow-package-menu-hover:
    0 0 28px rgba(0, 183, 255, 0.85), 0 0 30px rgba(0, 183, 255, 0.2);

  /* ICON PACKAGE BUTTON GLOW */
  --shadow-package-icon: 0 0 10px rgba(0, 183, 255, 0.45);
  --shadow-package-icon-hover:
    0 0 18px rgba(0, 183, 255, 0.95), 0 0 30px rgba(0, 183, 255, 0.18);

  /* MAIL PACKAGE BUTTON GLOW */
  --shadow-package-mail-hover:
    0 0 16px rgba(255, 220, 90, 0.95), 0 0 30px rgba(255, 180, 40, 0.28);

  /* PRESS ME PACKAGE BUTTON GLOW */
  --shadow-package-pressme-hover:
    0 0 50px rgba(255, 70, 70, 0.95), 0 0 10px rgba(255, 70, 70, 0.28);

  /*========================
  BUTTON HINT FOR MOBILE VIEW
===========================*/

  --hint-glow-blue-rgb: 0, 132, 255;
  --hint-glow-cyan-rgb: 0, 255, 200;
  --hint-border-idle: rgba(255, 255, 255, 0.25);

  /*========================
 CARD BACK
===========================*/

  --text-color-package-back: rgba(43, 33, 24, 1);

  --border-package-back-btn: rgba(43, 33, 24, 0.38);
  --background-package-back-btn: rgba(255, 247, 232, 0.08);

  --border-color-package-back-btn-hover: rgba(43, 33, 24, 0.85);
  --background-package-back-btn-hover: rgba(255, 247, 232, 0.16);

  --text-color-package-back-flip-btn: rgba(43, 33, 24, 0.85);

  --background-package-back-barcode-btn: rgba(255, 255, 255, 0.42);
  --background-package-back-barcode-lines: repeating-linear-gradient(
    to right,
    rgba(43, 33, 24, 0.85) 0 2px,
    transparent 2px 4px,
    rgba(43, 33, 24, 0.85) 4px 5px,
    transparent 5px 8px
  );

  /*========================
  SECTION CARD COLORS
===========================*/

  --background-section-card: rgba(5, 9, 20, 0.418);
  --border-section-card: rgba(0, 183, 255, 0.22);
  --box-shadow-section-card:
    0 20px 45px rgba(0, 0, 0, 0.35), 0 0 24px rgba(0, 183, 255, 0.12);

  --shadow-portrait-image: 0 18px 35px rgba(0, 0, 0, 0.35);

  --text-section-back-btn: rgba(255, 255, 255, 0.72);

  /*========================
  FORM COLORS
===========================*/

  --background-form-field: rgba(255, 255, 255, 0.06);
  --border-form-field: rgba(255, 255, 255, 0.22);
  --text-form-placeholder: rgba(255, 255, 255, 0.55);

  --border-form-field-focus: rgba(0, 183, 255, 0.75);
  --box-shadow-form-field-focus: 0 0 18px rgba(0, 183, 255, 0.18);

  /*========================
  SHARED SURFACE COLORS
===========================*/

  --surface-soft: rgba(255, 255, 255, 0.06);
  --surface-medium: rgba(255, 255, 255, 0.08);
  --border-glow-soft: rgba(0, 183, 255, 0.18);
  --accent-gold-soft: rgba(227, 192, 143, 0.75);

  /*========================
  FOOTER COLORS
===========================*/

  /* FOOTER BACKGROUND */
  --background-footer:
    radial-gradient(circle at 0% 0%, rgba(0, 132, 255, 0.12), transparent 40%),
    rgba(3, 7, 17, 0.85);

  /*========================
  FONTS
===========================*/

  --font-brand: "DynaPuff", system-ui, sans-serif;
  --font-heading: "Sora", sans-serif;
  --font-body: "Inter", sans-serif;
}

/*========================
  RESET
===========================*/

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

/*========================
  GLOBAL STYLES
=========================*/

/* MOBILE FIRST */
html {
  min-height: 100%;
  background: var(--html-color);
  scroll-behavior: smooth;
  font-size: 100%;
}

body {
  min-height: 100dvh;
  background: var(--background-gradient);
  font-family: var(--font-body);

  display: flex;
  flex-direction: column;
}

.about-section,
.skills-section,
.experience-section,
.references-section,
.project-details-section,
.contact-section,
.portfolio-app {
  flex: 1;
}

/*========================
  BRAND & LANGUAGE
=========================*/

/* BRAND MARK / HOME BUTTON */
.brand-mark {
  position: absolute;
  top: 1.9rem;
  left: 1.5rem;

  display: inline-flex;
  align-items: center;
  gap: 0.3rem;

  color: var(--brand-mark-color);
  text-decoration: none;
  font-family: var(--font-brand);
  font-weight: 700;

  transform: rotate(-6deg);
}

.brand-mark:hover {
  opacity: 1;
  transform: rotate(-8deg) scale(1.05);
}

/* HIDDEN EYEBROW TEXT ON MOBILE */
.eyebrow {
  display: none;
}

/* BRAND SYMBOL */
.brand-symbol {
  width: 1.25rem;
  height: 1.25rem;

  display: inline-flex;
  align-items: center;
  justify-content: center;

  border: 2px solid currentColor;
  border-radius: 50%;

  font-size: 0.65rem;
  line-height: 1;
}

/* LANGUAGE TOGGLE */
.language-toggle {
  position: absolute;
  top: 1.5rem;
  right: 1.5rem;

  display: flex;
  align-items: center;
  gap: 0.35rem;

  color: var(--text-color);
  font-size: 1.5rem;
  font-weight: 700;
}

/* LANGUAGE BUTTONS */
.language-btn {
  font-size: 1rem;
  background: transparent;
  border: none;
  color: inherit;
  cursor: pointer;
  opacity: 0.55;
}

.language-btn.active {
  opacity: 1;
}

/*========================
  HERO SECTION
=========================*/

/* MAIN LAYOUT */
.portfolio-app {
  min-height: 100dvh;
  display: flex;
  flex-direction: column;
  gap: 2rem;
  padding: 6rem 1.5rem 1.5rem;
}

/* INTRO / HERO SECTION */
.intro-panel {
  display: flex;
  flex-direction: column;
  min-height: 100dvh;
  gap: 1rem;
}

/* CREATES VERTICAL SPACE BELOW THE FIXED TOP BRAND/LANGUAGE AREA */
.hero-content {
  margin-top: 5.5rem;
}

/* HERO TEXT CONTENT */
.info-content {
  display: flex;
  flex-direction: column;
  text-align: center;
  gap: 0.75rem;
  align-items: center;
  color: var(--text-color);
}

/* HERO HEADER */
.info-content h1 {
  font-family: var(--font-heading);
  font-size: clamp(4rem, 13vw, 5rem);
  color: var(--heading-color);
  line-height: 0.95;
  letter-spacing: -0.05em;
}

.info-content h1 span {
  display: block;
}

/* HERO BODY */
.info-content p {
  padding-top: 1rem;
  font-family: var(--font-body);
  font-size: 1.05rem;
  line-height: 1.6;
  color: var(--text-color);
  max-width: 34rem;
}

/* HIDE CONTENT ON MOBILE WHEN PRESS CTA BUTTON */
.desktop-flip-info {
  display: none;
}

/*========================
  CTA BUTTONS
=========================*/

/* CALL TO ACTION BUTTONS */
.intro-actions {
  display: flex;
  justify-content: center;
  gap: 0.9rem;
  flex-wrap: wrap;
  margin-top: 2rem;
}

/* CALL TO ACTION BUTTONS */
.cta-btn {
  position: relative;
  overflow: hidden;
  border-radius: 999px;
  padding: 0.85rem 1.2rem;
  font-size: 0.95rem;
  font-weight: 700;
  min-width: 10rem;
  text-align: center;

  backdrop-filter: blur(10px);
  cursor: pointer;
}

/* CONTROL THE "PLASTIC/HIGHLIGHT" AREA ABOVE THE PRIMARY BUTTON */
.cta-primary::before {
  content: "";
  position: absolute;
  top: 0;
  left: 10%;
  right: 10%;
  height: 45%;

  background: var(--background-cta-primary-before);

  border-radius: inherit;
  pointer-events: none;
}

/* PRIMARY CALL TO ACTION BUTTON */
.cta-primary {
  background: var(--background-cta-primary);
  border: 1px solid var(--border-cta-primary);
  color: var(--text-color-cta-primary);
  box-shadow: var(--box-shadow-cta-primary);
}

/* SECONDARY CALL TO ACTION BUTTON */
.cta-secondary {
  background: var(--background-cta-secondary);
  color: var(--text-color-cta-secondary);
  border: 2px solid var(--border-color-cta-secondary);
}

.cta-secondary:hover {
  background-color: var(--background-cta-secondary-hover);
  border-color: var(--border-color-cta-secondary-hover);
}

/*========================
  ABOUT ME SECTION
=========================*/

.about-section {
  display: none;

  min-height: auto;
  padding: 3rem 1.5rem 1.5rem;

  flex-direction: column;
  justify-content: center;
  color: var(--text-color);
}

.about-card {
  width: 100%;
  max-width: 24rem;
  margin: 0 auto;
  padding: 1.25rem;
  border-radius: 1rem;
  background: var(--background-section-card);
  border: 1px solid var(--border-section-card);
  box-shadow: var(--box-shadow-section-card);
  backdrop-filter: blur(10px);
  text-align: center;
}

.about-card h2 {
  font-family: var(--font-heading);
  color: var(--heading-color);
  font-size: clamp(1.6rem, 6vw, 2.4rem);
  margin-bottom: 1rem;
}

.about-image {
  width: 14rem;
  max-width: 85%;
  margin: 0 auto 1.25rem;
  display: block;
  border-radius: 1rem;
  filter: drop-shadow(var(--shadow-portrait-image));
}

.about-text h2 {
  font-family: var(--font-heading);
  color: var(--heading-color);
  font-size: clamp(1.7rem, 7vw, 3.2rem);
  margin-bottom: 1rem;
}

.about-text p {
  font-size: 1rem;
  line-height: 1.6;
  margin-bottom: 1rem;
}

.text-highlight {
  color: var(--heading-color);
  font-weight: 900;
  border-bottom: 1px solid var(--accent-gold-soft);
}

/* ABOUT MODE - MOBILE FIRST */
body.about-mode .portfolio-app,
body.about-mode .brand-mark,
body.about-mode .language-toggle {
  display: none;
}

body.about-mode .about-section {
  display: flex;
}

/*========================
  SKILLS SECTION
=========================*/

.skills-section {
  display: none;

  flex: 1;
  padding: 3rem 1.5rem 1.5rem;

  flex-direction: column;
  justify-content: center;
  color: var(--text-color);
}

.skills-card {
  width: 100%;
  max-width: 24rem;
  margin: 0 auto;

  padding: 1.25rem;
  border-radius: 1rem;

  background: var(--background-section-card);
  border: 1px solid var(--border-section-card);
  box-shadow: var(--box-shadow-section-card);

  backdrop-filter: blur(10px);
  text-align: center;
}

.skills-card h2 {
  font-family: var(--font-heading);
  color: var(--heading-color);
  font-size: clamp(1.7rem, 7vw, 3.2rem);
  margin-bottom: 0.5rem;
}

.skills-intro {
  max-width: 18rem;
  margin: 0 auto 1.5rem;

  color: var(--text-section-back-btn);
  font-size: 0.9rem;
  line-height: 1.5;
}

.skills-list {
  list-style: none;

  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.9rem 0.6rem;
}

.skill-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.35rem;

  font-size: 0.8rem;
  font-weight: 800;
  color: var(--text-color);
  text-align: center;
}

.skill-icon {
  width: 2.4rem;
  height: 2.4rem;
  object-fit: contain;
  display: block;
}

/* SKILLS MODE - MOBILE FIRST */
body.skills-mode .portfolio-app,
body.skills-mode .brand-mark,
body.skills-mode .language-toggle {
  display: none;
}

body.skills-mode .skills-section {
  display: flex;
}

/*========================
  SCROLL INDICATOR
=========================*/

/* SCROLL DOWN */
.scroll-down-link {
  display: block;
  margin: auto auto 6.5rem;
}

/* SCROLL ARROW ICON */
.scroll-arrow-icon {
  width: 2.5rem;
  height: 2.5rem;
  display: block;
}

/*========================
  PACKAGE SECTION
===========================*/

/* PACKAGE / ACTION FIGURE */
.package-panel {
  display: flex;
  justify-content: center;
  padding: 2rem 0 2rem;
}

/* CONTROLS THE RESPONSIVE SIZE OF THE INTERACTIVE PACKAGE */
.package-scene {
  position: relative;
  width: min(96vw, 340px);
  perspective: 1000px;
  margin: 0 auto;
}

/* MAKES THE PACKAGE IMAGES FIT INSIDE THE PACKAGE SCENE */
.package-image {
  width: 100%;
  height: 100%;
  display: block;
  object-fit: contain;
}

/* FRONT AND BACK CARD HAVE SAME POSITION AND SIZE */
.package-card {
  position: relative;
  aspect-ratio: 1023 / 1537;
  transform-style: preserve-3d;
  transition: transform 1.1s ease;
}

.package-front {
  transform: rotateY(0deg);
}

.package-back {
  transform: rotateY(180deg);
}

.package-face {
  position: absolute;
  inset: 0;
  backface-visibility: hidden;
  -webkit-backface-visibility: hidden;
}

/* FLIP THE CARD */
.package-card.is-flipped {
  transform: rotateY(-180deg);
}

/*========================
  PACKAGE FOCUS MODE
=========================*/

body.package-focus-mode .intro-panel {
  display: none;
}

body.package-focus-mode .brand-mark,
body.package-focus-mode .language-toggle {
  display: none;
}

body.package-focus-mode .portfolio-app {
  min-height: auto;
  padding-top: 3rem;
}

/*==============================
  PACKAGE BUTTONS SECTION FRONT
================================*/

/* PACKAGE BUTTON SETTINGS */
.package-btn {
  position: absolute;
  padding: 0;
  margin: 0;
  border-radius: 10.5px;
  border: none;
  transition:
    box-shadow 0.3s ease,
    background-color 0.3s ease,
    transform 0.3s ease;
  color: var(--text-actionfigure-btn);
  background-color: var(--background-actionfigure-btn);
  cursor: pointer;
  z-index: 2;
}

/* PACKAGE BUTTON BOX SHADOW COLORS FRONT */
.package-btn-menu {
  box-shadow: var(--shadow-package-menu);
}

.package-btn-menu:hover,
.package-btn-menu.is-hinting {
  box-shadow: var(--shadow-package-menu-hover);
}
.package-btn-icon {
  box-shadow: var(--shadow-package-icon);
}

/* PACKAGE BUTTON HINT AND HOVER FOR ICONS FRONT */
.package-btn-icon:hover,
.package-btn-icon.is-hinting {
  box-shadow: var(--shadow-package-icon-hover);
}

/* PACKAGE BUTTON HINT AND HOVER FOR MAIL FRONT */
.package-btn-mail:hover,
.package-btn-mail.is-hinting {
  box-shadow: var(--shadow-package-mail-hover);
}

/* PACKAGE BUTTON HINT AND HOVER FOR PRESS-ME FRONT */
.package-btn-pressme:hover,
.package-btn-pressme.is-hinting {
  box-shadow: var(--shadow-package-pressme-hover);
}

/*PACKAGE BOX-SHADOW POSITION FRONT */
.package-btn-pressme {
  top: 10.8%;
  right: 9.3%;
  width: 15%;
  height: 10%;
  border-radius: 35px;
}

.package-btn-aboutme {
  top: 28.6%;
  left: 9.6%;
  width: 18.3%;
  height: 12.2%;
}

.package-btn-skills {
  top: 41.9%;
  left: 9.6%;
  width: 17.8%;
  height: 11.2%;
}

.package-btn-cv {
  top: 53.7%;
  left: 9.6%;
  width: 18.2%;
  height: 11%;
}

.package-btn-projects {
  top: 65.6%;
  left: 9.5%;
  width: 17.9%;
  height: 11.8%;
}

.package-btn-linkedin {
  top: 50.5%;
  right: 12.8%;
  width: 10.1%;
  height: 6.6%;
  border-radius: 3px;
}

.package-btn-github {
  top: 61%;
  right: 12%;
  width: 12.6%;
  height: 8.4%;
  border-radius: 28px;
}

.package-btn-mail {
  top: 76.5%;
  right: 12%;
  width: 16%;
  height: 7.5%;
}

/*==============================
  PACKAGE BACK SIDE CONTENT CV
================================*/

.back-section {
  position: absolute;
  z-index: 2;
  text-align: center;
}

/* CV SECTION BACKSIDE */
#cv-panel {
  display: none;
  flex-direction: column;
  align-items: center;

  font-family: var(--font-body);
  top: 18%;
  left: 10%;
  width: 80%;

  color: var(--text-color-package-back);
  padding: 1rem 0.85rem;
}

#cv-panel h2 {
  font-family: var(--font-heading);
  color: inherit;
  font-size: 1.9rem;
  line-height: 1;
  margin-bottom: 0.5rem;
}

.cv-options {
  margin-top: 1.25rem;

  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1rem;
  width: 90%;
}

.cv-tab,
.card-link {
  margin-top: 0;
  width: 100%;
  padding: 0.6rem 0.7rem;
  border-radius: 4px;
  border: 1.5px solid var(--border-package-back-btn);
  background: var(--background-package-back-btn);

  color: var(--text-color-package-back);
  font-family: var(--font-body);
  font-size: 0.82rem;
  font-weight: 800;
  text-decoration: none;

  transition:
    border-color 0.25s ease,
    background-color 0.25s ease,
    transform 0.25s ease;

  cursor: pointer;
}

.cv-tab:hover,
.card-link:hover {
  border-color: var(--border-color-package-back-btn-hover);
  background: var(--background-package-back-btn-hover);
  transform: translateY(-1px);
}

/*========================
  EXPERIENCE / EDUCATION SECTION
=========================*/

.experience-section {
  display: none;

  flex: 1;
  padding: 3rem 1.5rem 1.5rem;

  flex-direction: column;
  justify-content: flex-start;
  color: var(--text-color);
}

.experience-card {
  width: 100%;
  max-width: 24rem;
  margin: 0 auto;

  padding: 1.25rem;
  border-radius: 1rem;

  background: var(--background-section-card);
  border: 1px solid var(--border-section-card);
  box-shadow: var(--box-shadow-section-card);

  backdrop-filter: blur(10px);
}

/* MAIN HEADING */
.experience-card h2 {
  font-family: var(--font-heading);
  color: var(--heading-color);
  font-size: clamp(1.55rem, 6vw, 2.4rem);
  line-height: 1.15;
  text-align: center;
  margin-bottom: 1.5rem;
}

/* HIDDEN ON MOBILE - SHOWN ON DESKTOP */
.experience-intro {
  display: none;
}

/* SUBTITLES: WORK EXPERIENCE / EDUCATION */
.experience-subtitle {
  margin-bottom: 1rem;

  color: var(--heading-color);
  font-family: var(--font-heading);
  font-size: 1.1rem;
  line-height: 1.2;
  text-align: left;
}

.education-list + .experience-subtitle,
.experience-list + .experience-subtitle {
  margin-top: 1.75rem;
}

/* LIST WRAPPERS */
.experience-list,
.education-list {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

/* EACH EXPERIENCE / EDUCATION ITEM */
.experience-item {
  padding: 1rem;
  border-radius: 0.9rem;

  background: var(--surface-soft);
  border: 1px solid var(--border-section-card);

  text-align: left;
}

/* HEADER WITH LOGO + TEXT */
.experience-header {
  display: flex;
  align-items: center;
  gap: 0.85rem;

  margin-bottom: 0.9rem;
}

/* LOGOS */
.experience-logo {
  width: 4.5rem;
  height: 3rem;

  object-fit: contain;
  flex-shrink: 0;

  border-radius: 0.45rem;
}

/* YH AKADEMIN / EDUCATION LOGO */
.education-item .experience-logo {
  width: 4.6rem;
  height: 3.2rem;
}

/* COMPANY / EDUCATION NAME */
.experience-item h3 {
  color: var(--heading-color);
  font-family: var(--font-heading);
  font-size: 1rem;
  line-height: 1.2;
  margin-bottom: 0.2rem;
}

/* ROLE */
.experience-role {
  color: var(--text-color);
  font-size: 0.85rem;
  font-weight: 800;
  line-height: 1.35;
}

/* PERIOD */
.experience-period {
  color: var(--text-section-back-btn);
  font-size: 0.78rem;
  line-height: 1.35;
}

/* DESCRIPTION TEXT EXPERIENCE */
.experience-description {
  margin-bottom: 0.8rem;

  color: var(--text-color);
  font-size: 0.88rem;
  line-height: 1.6;
}

/* BULLET LIST EXPERIENCE */
.experience-points {
  padding-left: 1.1rem;

  color: var(--text-section-back-btn);
  font-size: 0.82rem;
  line-height: 1.5;
}

.experience-points li {
  margin-bottom: 0.35rem;
}

.experience-points li:last-child {
  margin-bottom: 0;
}

/* EXPERIENCE MODE - MOBILE FIRST */
body.experience-mode .portfolio-app,
body.experience-mode .brand-mark,
body.experience-mode .language-toggle {
  display: none;
}

body.experience-mode .experience-section {
  display: flex;
}

/*========================
  REFERENCES SECTION
=========================*/

.references-section {
  display: none;

  flex: 1;
  padding: 3rem 1.5rem 1.5rem;

  flex-direction: column;
  justify-content: flex-start;
  color: var(--text-color);
}

.references-card {
  width: 100%;
  max-width: 24rem;
  margin: 0 auto;

  padding: 1.25rem;
  border-radius: 1rem;

  background: var(--background-section-card);
  border: 1px solid var(--border-section-card);
  box-shadow: var(--box-shadow-section-card);

  backdrop-filter: blur(10px);
}

.references-card h2 {
  font-family: var(--font-heading);
  color: var(--heading-color);
  font-size: clamp(1.7rem, 7vw, 3.2rem);
  line-height: 1.1;
  text-align: center;
  margin-bottom: 1.5rem;
}

.references-list {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.reference-card {
  padding: 1rem;
  border-radius: 0.9rem;

  background: var(--surface-soft);
  border: 1px solid var(--border-section-card);

  text-align: left;
}

.reference-header {
  display: flex;
  align-items: center;
  gap: 0.8rem;
  margin-bottom: 0.8rem;
}

.reference-avatar {
  width: 3.25rem;
  height: 3.25rem;

  border-radius: 50%;
  object-fit: cover;
  flex-shrink: 0;
}

.reference-card h3 {
  color: var(--heading-color);
  font-family: var(--font-heading);
  font-size: 1rem;
  line-height: 1.2;
  margin-bottom: 0.15rem;
}

.reference-header p {
  color: var(--text-section-back-btn);
  font-size: 0.75rem;
  line-height: 1.35;
}

.reference-quote {
  color: var(--text-color);
  font-size: 0.88rem;
  line-height: 1.6;
}

/* REFERENCES MODE - MOBILE FIRST */
body.references-mode .portfolio-app,
body.references-mode .brand-mark,
body.references-mode .language-toggle {
  display: none;
}

body.references-mode .references-section {
  display: flex;
}

/*========================
  PROJECT DETAILS SECTION
=========================*/

#snake-project .project-details-image {
  background: rgba(255, 255, 255, 0.04);
  padding: 0.4rem;
}

.project-details-section {
  display: none;

  flex: 1;
  padding: 3rem 1.5rem 1.5rem;

  flex-direction: column;
  justify-content: flex-start;
  color: var(--text-color);
}

.project-details-card {
  width: 100%;
  max-width: 24rem;
  margin: 0 auto;

  padding: 1.25rem;
  border-radius: 1rem;

  background: var(--background-section-card);
  border: 1px solid var(--border-section-card);
  box-shadow: var(--box-shadow-section-card);

  backdrop-filter: blur(10px);
}

.project-details-card h2 {
  font-family: var(--font-heading);
  color: var(--heading-color);
  font-size: clamp(1.7rem, 7vw, 3.2rem);
  line-height: 1.1;
  text-align: center;
  margin-bottom: 1.25rem;
}

/* PROJECT IMAGE */
.project-details-image {
  width: 100%;
  display: block;

  border-radius: 0.9rem;
  margin-bottom: 1.25rem;

  border: 1px solid var(--border-section-card);
  object-fit: cover;
}

/* DESCRIPTION */
.project-details-description {
  color: var(--text-color);
  font-size: 0.95rem;
  line-height: 1.6;
  margin-bottom: 1.25rem;
}

/* TECH LIST */
.project-tech-list {
  list-style: none;

  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;

  margin-bottom: 1.25rem;
}

.project-tech-list li {
  padding: 0.4rem 0.7rem;
  border-radius: 999px;

  background: var(--surface-medium);
  border: 1px solid var(--border-section-card);

  color: var(--heading-color);
  font-size: 0.78rem;
  font-weight: 800;
}

/* PROJECT LINKS */
.project-links {
  display: flex;
  justify-content: center;
  gap: 0.8rem;
  flex-wrap: wrap;
}

.project-links a {
  padding: 0.65rem 1rem;
  border-radius: 999px;

  background: transparent;
  border: 1px solid var(--border-section-card);

  color: var(--text-color);
  font-size: 0.85rem;
  font-weight: 800;
  text-decoration: none;
}

.project-links a:hover {
  color: var(--heading-color);
  border-color: var(--heading-color);
}

/* BUTTERFLY PROJECT MODE - MOBILE FIRST */
body.butterfly-project-mode .portfolio-app,
body.butterfly-project-mode .brand-mark,
body.butterfly-project-mode .language-toggle {
  display: none;
}

body.butterfly-project-mode #butterfly-project {
  display: flex;
}

/* SNAKE PROJECT MODE - MOBILE FIRST */
body.snake-project-mode .portfolio-app,
body.snake-project-mode .brand-mark,
body.snake-project-mode .language-toggle {
  display: none;
}

body.snake-project-mode #snake-project {
  display: flex;
}

/* PROJECTS SECTION BACKSIDE */
#projects-panel {
  display: none;
  justify-content: center;
  flex-direction: column;
  align-items: center;

  font-family: var(--font-body);
  top: 18%;
  left: 10%;
  width: 80%;

  color: var(--text-color-package-back);
  padding: 1rem 0.85rem;
}

/* SHOW ACTIVE BACK PANEL */
#cv-panel.is-active,
#projects-panel.is-active {
  display: flex;
}

#projects-panel h2 {
  font-family: var(--font-heading);
  color: inherit;
  font-size: 1.9rem;
  line-height: 1;
  margin-bottom: 0.5rem;
}

.project-options {
  margin-top: 1.25rem;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 0.75rem;
  width: 90%;
}

.project-card {
  aspect-ratio: 4 / 3;
  padding: 0;

  overflow: hidden;
  border-radius: 4px;
  border: 1.5px solid var(--border-package-back-btn);
  background: var(--background-package-back-btn);
  cursor: default;
}

.project-card:not(:disabled) {
  cursor: pointer;
}

.project-preview-frame {
  width: 100%;
  height: 100%;
}

.project-preview {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.project-card:not(:disabled):hover {
  border-color: var(--border-color-package-back-btn-hover);
  background: var(--background-package-back-btn-hover);
  transform: translateY(-1px);
}

/* FLIP ACTIONFIGURE BACK BUTTON */
.flip-back-btn {
  position: absolute;
  bottom: 6%;
  right: 18%;
  width: 23%;

  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.15rem;

  background: transparent;
  border: none;
  color: var(--text-color-package-back-flip-btn);
  cursor: pointer;
}

/* BARCODE POSITION AND STYLE */
.barcode-lines {
  position: relative;
  width: 100%;
  height: 1.2rem;

  border-radius: 3px;
  background: var(--background-package-back-barcode-btn);
  overflow: hidden;
}

/* WRITING THE LINES WITH REPEATING LINEAR GRADIENT */
.barcode-lines::before {
  content: "";
  position: absolute;
  inset: 0.15rem 0.25rem;

  background: var(--background-package-back-barcode-lines);
}

.back-btn-text {
  font-family: var(--font-body);
  font-size: 0.55rem;
  font-weight: 800;
  letter-spacing: 0.08em;
}

/*========================
  SHARED BACK ACTION BUTTONS FOR PROJECT, EXPERIENCE, REFERENCES
=========================*/

.section-actions {
  width: 100%;
  max-width: 24rem;
  margin: clamp(2rem, 8vw, 4rem) auto 0;

  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.75rem;
}

.section-back-btn {
  width: 100%;
  max-width: 16rem;

  padding: 0.75rem 1rem;
  border-radius: 999px;

  font-family: var(--font-body);
  font-size: 0.9rem;
  font-weight: 800;

  cursor: pointer;
  transition:
    color 0.25s ease,
    border-color 0.25s ease,
    background-color 0.25s ease,
    transform 0.25s ease;
}

.section-back-btn:hover {
  transform: translateY(-1px);
}

.section-back-primary {
  background: var(--surface-medium);
  border: 1px solid var(--border-section-card);
  color: var(--heading-color);
}

.section-back-secondary {
  background: transparent;
  border: 1px solid rgba(255, 255, 255, 0.18);
  color: var(--text-section-back-btn);
}

.section-back-primary:hover,
.section-back-secondary:hover {
  color: var(--heading-color);
  border-color: var(--heading-color);
}

/*========================
  CONTACT-FORM
=========================*/

/* CONTACT CONTAINER SECTION */
.contact-section {
  min-height: auto;
  padding: 3rem 1.5rem 1.5rem;
  flex-direction: column;
  justify-content: center;
  color: var(--text-color);
}

/* CONTACT HEADER */
.contact-section h2 {
  margin-top: 0.3rem;
  font-family: var(--font-heading);
  color: var(--heading-color);
  font-size: clamp(1.7rem, 7vw, 3.2rem);
  text-align: center;
  margin-bottom: 1.25rem;
}

/* CONTACT FORM */
.contact-form {
  width: 100%;
  max-width: 24rem;
  margin: 0 auto;

  display: flex;
  flex-direction: column;
  gap: 0.5rem;

  padding: 1.25rem;
  border-radius: 1rem;

  background: var(--background-section-card);
  border: 1px solid var(--border-section-card);
  box-shadow: var(--box-shadow-section-card);

  backdrop-filter: blur(10px);
}

/* CONTACT FORM INPUT AND TEXTAREA */
.contact-form input,
.contact-form textarea {
  width: 100%;
  padding: 0.75rem 0.9rem;

  border-radius: 0.65rem;
  border: 1px solid var(--border-form-field);
  background: var(--background-form-field);

  color: var(--text-color);
  font-family: var(--font-body);
  font-size: 0.95rem;
  resize: none;

  outline: none;
}

/* SCREEN READ, HIDE LABEL */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip-path: inset(50%);
  white-space: nowrap;
  border: 0;
}

/* CONTACT TEXTAREA SIZE */
.contact-form textarea {
  min-height: 7rem;
  resize: vertical;
}

/* CONTACT PLACEHOLDER TEXTCOLOR */
.contact-form input::placeholder,
.contact-form textarea::placeholder {
  color: var(--text-form-placeholder);
}

/* CONTACT INPUT AND TEXTAREA FOCUS EFFECT */
.contact-form input:focus,
.contact-form textarea:focus {
  border-color: var(--border-form-field-focus);
  box-shadow: var(--box-shadow-form-field-focus);
}

/* CONTACT SUBMIT BUTTON */
.contact-form button {
  margin-top: 0.5rem;
  padding: 0.75rem 1.1rem;

  border: none;
  border-radius: 999px;

  background: var(--background-cta-primary);
  color: var(--text-color-cta-primary);

  font-family: var(--font-body);
  font-weight: 800;
  cursor: pointer;
}

/* CONTACT BACK BUTTON */
.contact-actions {
  margin-top: clamp(1rem, 5vw, 2rem);
}

/* CONTACT SECTION IS HIDDEN BY DEFAULT */
.contact-section {
  display: none;
}

/* CONTACT MODE - MOBILE FIRST */
body.contact-mode .portfolio-app,
body.contact-mode .brand-mark,
body.contact-mode .language-toggle {
  display: none;
}

body.contact-mode .contact-section {
  display: flex;
}

/*========================
  FOOTER
=========================*/

/* DEFAULT FOOTER */
.footer {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.55rem;
  padding: 0.9rem 1.25rem 1rem;
  background: var(--background-footer);
  color: var(--text-color);
  border-top: 1px solid var(--border-glow-soft);

  font-size: 0.9rem;
}

.footer-top-wrap {
  width: 100%;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.footer-brand {
  color: var(--brand-mark-color);
  text-decoration: none;
  font-family: var(--font-brand);
  font-weight: 700;
  padding-top: 0;

  transform: rotate(-10deg);
}

.footer-links {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 1rem;
}

.footer-icon {
  width: 1.55rem;
  height: 1.55rem;
  display: block;
}

.weather-widget {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;

  padding: 0.3rem 0.55rem;
  border-radius: 999px;

  background: var(--surface-soft);
  border: 1px solid var(--border-glow-soft);

  font-size: 0.82rem;
  font-weight: 700;
}

.weather-icon {
  width: 1.45rem;
  height: 1.45rem;
  object-fit: contain;
}

#weatherCity {
  white-space: nowrap;
}

#weatherTemp {
  font-weight: 800;
  color: var(--heading-color);
}