/* ============================================
   Digital PB School 2.0 - Page Components
   ============================================ */

/* ── Hero Section ── */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg-hero);
  overflow: hidden;
}

.hero__particles {
  position: absolute;
  inset: 0;
  z-index: 1;
  pointer-events: none;
}

.hero__overlay {
  position: absolute;
  inset: 0;
  z-index: 2;
  background: radial-gradient(
    ellipse at 30% 50%,
    rgba(184, 148, 95, 0.06) 0%,
    transparent 60%
  );
}

.hero__content {
  position: relative;
  z-index: 3;
  text-align: center;
  max-width: 780px;
  padding: 0 var(--content-padding);
}

.hero__label {
  font-family: var(--font-en-display);
  font-size: var(--fs-caption);
  font-weight: var(--fw-regular);
  letter-spacing: var(--ls-widest);
  text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: var(--space-xl);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-md);
}

.hero__label::before,
.hero__label::after {
  content: '';
  width: 40px;
  height: 1px;
  background-color: var(--color-accent);
  opacity: 0.5;
}

.hero__title {
  font-family: var(--font-display);
  font-size: var(--fs-hero);
  font-weight: var(--fw-bold);
  color: var(--color-white);
  line-height: 1.25;
  letter-spacing: var(--ls-tight);
  margin-bottom: var(--space-lg);
}

.hero__title em {
  font-style: normal;
  color: var(--color-accent);
}

.hero__subtitle {
  font-size: var(--fs-body-lg);
  color: rgba(255, 255, 255, 0.65);
  line-height: var(--lh-relaxed);
  margin-bottom: var(--space-2xl);
  max-width: 580px;
  margin-left: auto;
  margin-right: auto;
}

.hero__actions {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-md);
  flex-wrap: wrap;
}

.hero__scroll-indicator {
  position: absolute;
  bottom: 40px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 3;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-sm);
  color: rgba(255, 255, 255, 0.35);
  font-size: var(--fs-label);
  letter-spacing: var(--ls-wider);
  text-transform: uppercase;
}

.hero__scroll-line {
  width: 1px;
  height: 50px;
  background: linear-gradient(to bottom, var(--color-accent), transparent);
  animation: scrollLine 2s ease-in-out infinite;
}

@keyframes scrollLine {
  0%   { opacity: 0; transform: scaleY(0); transform-origin: top; }
  50%  { opacity: 1; transform: scaleY(1); transform-origin: top; }
  100% { opacity: 0; transform: scaleY(1); transform-origin: bottom; }
}

/* Sub-page Hero */
.hero--sub {
  min-height: 50vh;
  padding-top: var(--header-height);
}

.hero--sub .hero__title {
  font-size: var(--fs-h1);
}

/* ── Tabs Component ── */
.tabs {
  display: flex;
  gap: 0;
  border-bottom: 1px solid var(--color-gray-200);
  margin-bottom: var(--space-2xl);
}

.tab {
  padding: var(--space-md) var(--space-xl);
  font-size: var(--fs-body-sm);
  font-weight: var(--fw-medium);
  color: var(--color-gray-400);
  border-bottom: 2px solid transparent;
  cursor: pointer;
  transition: all var(--duration-fast) var(--ease-default);
  white-space: nowrap;
}

.tab:hover {
  color: var(--color-gray-700);
}

.tab--active {
  color: var(--color-primary);
  border-bottom-color: var(--color-accent);
}

.tab-panel {
  display: none;
  opacity: 0;
  transform: translateY(10px);
  transition: all var(--duration-normal) var(--ease-default);
}

.tab-panel--active {
  opacity: 1;
  transform: translateY(0);
}

/* ── Accordion Component ── */
.accordion {
  display: flex;
  flex-direction: column;
  gap: 0;
}

.accordion__item {
  border-bottom: 1px solid var(--color-gray-200);
}

.accordion__trigger {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  padding: var(--space-xl) 0;
  font-size: var(--fs-body-lg);
  font-weight: var(--fw-semibold);
  color: var(--color-black);
  cursor: pointer;
  transition: color var(--duration-fast) var(--ease-default);
}

.accordion__trigger:hover {
  color: var(--color-accent);
}

.accordion__icon {
  width: 20px;
  height: 20px;
  position: relative;
  flex-shrink: 0;
}

.accordion__icon::before,
.accordion__icon::after {
  content: '';
  position: absolute;
  background-color: var(--color-gray-400);
  transition: transform var(--duration-normal) var(--ease-default);
}

.accordion__icon::before {
  width: 100%;
  height: 1.5px;
  top: 50%;
  left: 0;
  transform: translateY(-50%);
}

.accordion__icon::after {
  width: 1.5px;
  height: 100%;
  left: 50%;
  top: 0;
  transform: translateX(-50%);
}

.accordion__item--open .accordion__icon::after {
  transform: translateX(-50%) rotate(90deg);
}

.accordion__content {
  max-height: 0;
  overflow: hidden;
  transition: max-height var(--duration-normal) var(--ease-default);
}

.accordion__body {
  padding: 0 0 var(--space-xl);
  font-size: var(--fs-body);
  color: var(--color-gray-500);
  line-height: var(--lh-relaxed);
}

/* ── Contact Form ── */
.contact-form {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-xl);
}

.contact-form__full {
  grid-column: 1 / -1;
}

.form-field {
  position: relative;
}

.form-field__label {
  display: block;
  font-size: var(--fs-body-sm);
  font-weight: var(--fw-medium);
  color: var(--color-gray-600);
  margin-bottom: var(--space-xs);
  transition: color var(--duration-fast) var(--ease-default);
}

.form-field__label .required {
  color: var(--color-accent);
  margin-left: 2px;
}

.form-field__input,
.form-field__textarea {
  width: 100%;
  padding: 14px 16px;
  font-size: var(--fs-body);
  color: var(--color-black);
  background-color: var(--color-off-white);
  border: 1px solid var(--color-gray-200);
  border-radius: var(--radius-sm);
  transition: all var(--duration-fast) var(--ease-default);
}

.form-field__input:focus,
.form-field__textarea:focus {
  border-color: var(--color-accent);
  background-color: var(--color-white);
  box-shadow: 0 0 0 3px rgba(184, 148, 95, 0.1);
}

.form-field__textarea {
  min-height: 160px;
  resize: vertical;
}

.form-field--error .form-field__input,
.form-field--error .form-field__textarea {
  border-color: var(--color-error);
}

.form-field--error .form-field__label {
  color: var(--color-error);
}

.form-field__error-msg {
  font-size: var(--fs-caption);
  color: var(--color-error);
  margin-top: var(--space-xs);
  display: none;
}

.form-field--error .form-field__error-msg {
  display: block;
}

.contact-form__submit {
  grid-column: 1 / -1;
  justify-self: start;
}

/* Form Success */
.form-success {
  padding: var(--space-xl);
  background-color: rgba(58, 125, 92, 0.08);
  border: 1px solid rgba(58, 125, 92, 0.2);
  border-radius: var(--radius-md);
  text-align: center;
  opacity: 0;
  transform: translateY(10px);
  transition: all var(--duration-normal) var(--ease-default);
  margin-top: var(--space-lg);
}

.form-success--visible {
  opacity: 1;
  transform: translateY(0);
}

.form-success__icon {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background-color: var(--color-success);
  color: white;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  margin: 0 auto var(--space-md);
}

.form-success__text {
  font-size: var(--fs-body-sm);
  color: var(--color-success);
  line-height: var(--lh-relaxed);
}

/* ── Timeline (솔루션 생애주기) ── */
.timeline {
  position: relative;
  padding-left: var(--space-3xl);
}

.timeline::before {
  content: '';
  position: absolute;
  left: 12px;
  top: 0;
  bottom: 0;
  width: 2px;
  background: linear-gradient(
    to bottom,
    var(--color-accent),
    var(--color-gray-200)
  );
}

.timeline__item {
  position: relative;
  padding: var(--space-xl) 0;
  opacity: 0;
  transform: translateX(20px);
  transition: all var(--duration-slow) var(--ease-out);
}

.timeline__item--visible {
  opacity: 1;
  transform: translateX(0);
}

.timeline__dot {
  position: absolute;
  left: calc(-1 * var(--space-3xl) + 4px);
  top: var(--space-xl);
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background-color: var(--color-white);
  border: 2px solid var(--color-accent);
  z-index: 2;
}

.timeline__item--visible .timeline__dot {
  background-color: var(--color-accent);
}

.timeline__stage {
  font-size: var(--fs-body-sm);
  font-weight: var(--fw-bold);
  color: var(--color-accent);
  letter-spacing: var(--ls-wide);
  margin-bottom: var(--space-xs);
}

.timeline__period {
  font-size: var(--fs-caption);
  color: var(--color-gray-400);
  margin-bottom: var(--space-sm);
}

.timeline__items-list {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-xs) var(--space-lg);
}

.timeline__tag {
  font-size: var(--fs-body-sm);
  color: var(--color-gray-600);
  padding: 6px 14px;
  background-color: var(--color-off-white);
  border-radius: var(--radius-full);
  border: 1px solid var(--color-gray-200);
}

/* ── Contact Info Cards ── */
.contact-info {
  display: flex;
  flex-direction: column;
  gap: var(--space-xl);
}

.contact-info__item {
  display: flex;
  gap: var(--space-lg);
  align-items: flex-start;
}

.contact-info__icon {
  width: 44px;
  height: 44px;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: rgba(184, 148, 95, 0.1);
  border-radius: var(--radius-md);
  color: var(--color-accent);
}

.contact-info__icon svg {
  width: 20px;
  height: 20px;
}

.contact-info__label {
  font-size: var(--fs-body-sm);
  font-weight: var(--fw-semibold);
  color: var(--color-black);
  margin-bottom: 2px;
}

.contact-info__value {
  font-size: var(--fs-body-sm);
  color: var(--color-gray-500);
  line-height: var(--lh-relaxed);
}

/* ── Responsive Adjustments for Components ── */
@media screen and (max-width: 768px) {
  .hero {
    min-height: 85vh;
  }

  .hero--sub {
    min-height: 40vh;
  }

  .hero__label::before,
  .hero__label::after {
    width: 24px;
  }

  .hero__actions {
    flex-direction: column;
    width: 100%;
    padding: 0 var(--space-xl);
  }

  .hero__actions .btn {
    width: 100%;
  }

  .hero__scroll-indicator {
    display: none;
  }

  .contact-form {
    grid-template-columns: 1fr;
  }

  .tabs {
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
  }

  .tab {
    padding: var(--space-md) var(--space-lg);
    font-size: var(--fs-caption);
  }

  .timeline {
    padding-left: var(--space-2xl);
  }
}