/* ===== PhD PROGRAM PAGE STYLES ===== */

/* NAVBAR active link */
.active-nav { color: var(--accent) !important; font-weight: 700 !important; }

/* ===== HERO ===== */
.phd-hero {
  background: linear-gradient(135deg, #0d2b5e 0%, #1a3c6e 55%, #2e7d32 100%);
  color: #fff;
  padding: 52px 0 44px;
}
.phd-hero-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}
.phd-hero-text h1 { font-size: 1.8rem; color: #fff; margin-bottom: 12px; }
.phd-hero-text p  { font-size: 0.9rem; opacity: 0.88; margin-bottom: 18px; max-width: 460px; }

.phd-price-tag {
  display: inline-flex;
  flex-direction: column;
  background: rgba(255,255,255,0.12);
  border: 2px solid rgba(255,255,255,0.3);
  border-radius: 14px;
  padding: 13px 20px;
  backdrop-filter: blur(8px);
}
.phd-price-label  { font-size: 0.8rem; opacity: 0.75; text-transform: uppercase; letter-spacing: 1px; }
.phd-price-amount { font-size: 2rem; font-weight: 700; font-family: 'Merriweather', serif; color: #81c784; line-height: 1.1; }
.phd-price-note   { font-size: 0.82rem; opacity: 0.7; margin-top: 4px; }

.phd-hero-cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
}
.phd-hero-card {
  border-radius: 14px;
  padding: 16px 10px;
  text-align: center;
  backdrop-filter: blur(10px);
  border: 1px solid rgba(255,255,255,0.25);
  box-shadow: 0 8px 24px rgba(0,0,0,0.15), inset 0 1px 0 rgba(255,255,255,0.3);
  transition: transform 0.25s, box-shadow 0.25s;
}
.phd-hero-card:nth-child(1) { background: linear-gradient(135deg, rgba(99,179,237,0.3), rgba(49,130,206,0.15)); }
.phd-hero-card:nth-child(2) { background: linear-gradient(135deg, rgba(154,230,180,0.3), rgba(72,187,120,0.15)); }
.phd-hero-card:nth-child(3) { background: linear-gradient(135deg, rgba(251,211,141,0.3), rgba(237,137,54,0.15)); }
.phd-hero-card:nth-child(4) { background: linear-gradient(135deg, rgba(214,188,250,0.3), rgba(159,122,234,0.15)); }
.phd-hero-card:nth-child(5) { background: linear-gradient(135deg, rgba(254,178,178,0.3), rgba(245,101,101,0.15)); }
.phd-hero-card:nth-child(6) { background: linear-gradient(135deg, rgba(144,205,244,0.3), rgba(0,188,212,0.15)); }
.phd-hero-card:hover { transform: translateY(-6px); box-shadow: 0 14px 32px rgba(0,0,0,0.22); }
.phd-hero-card i { font-size: 1.4rem; color: #fff; display: block; margin-bottom: 6px; text-shadow: 0 2px 8px rgba(0,0,0,0.2); }
.phd-hero-card p { font-size: 0.76rem; font-weight: 700; color: #fff; text-shadow: 0 1px 4px rgba(0,0,0,0.2); }

/* ===== TABS SECTION ===== */
.phd-tabs-section { padding: 46px 0; background: var(--light-bg); }

.phd-tab-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  justify-content: center;
  margin-bottom: 26px;
}
.phd-tab-btn {
  background: var(--white);
  border: 2px solid var(--border);
  border-radius: 30px;
  padding: 8px 15px;
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--primary);
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 7px;
  transition: all 0.2s;
  font-family: 'Inter', sans-serif;
}
.phd-tab-btn i { color: var(--accent); font-size: 0.85rem; }
.phd-tab-btn:hover { background: var(--primary); color: #fff; border-color: var(--primary); }
.phd-tab-btn:hover i { color: #81c784; }
.phd-tab-btn.active { background: var(--primary); color: #fff; border-color: var(--primary); }
.phd-tab-btn.active i { color: #81c784; }

/* TAB CONTENT */
.phd-tab-content { display: none; }
.phd-tab-content.active { display: block; }

.tab-header {
  display: flex;
  align-items: center;
  gap: 20px;
  margin-bottom: 32px;
  background: var(--white);
  border-radius: 14px;
  padding: 16px 20px;
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
}
.tab-icon-big {
  width: 50px; height: 50px;
  background: linear-gradient(135deg, var(--primary), #2a5298);
  border-radius: 14px;
  display: flex; align-items: center; justify-content: center;
  flex-shrink: 0;
}
.tab-icon-big i { font-size: 1.4rem; color: #fff; }
.tab-header h2 { font-size: 1.25rem; color: var(--primary); margin-bottom: 4px; }
.tab-header p  { color: var(--text-light); font-size: 0.93rem; }

.tab-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
}

/* Glassy colorful tab cards */
.tab-card {
  border-radius: 16px;
  padding: 20px 16px;
  position: relative;
  overflow: hidden;
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid rgba(255,255,255,0.45);
  box-shadow: 0 8px 32px rgba(0,0,0,0.10), inset 0 1px 0 rgba(255,255,255,0.6);
  transition: transform 0.25s, box-shadow 0.25s;
}
.tab-card::before {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: 16px;
  opacity: 0.13;
  z-index: 0;
}
.tab-card > * { position: relative; z-index: 1; }
.tab-card:hover { transform: translateY(-6px); box-shadow: 0 16px 40px rgba(0,0,0,0.16), inset 0 1px 0 rgba(255,255,255,0.7); }

/* 6 rotating color themes */
.tab-card:nth-child(6n+1) { background: linear-gradient(135deg, rgba(99,179,237,0.22), rgba(49,130,206,0.12)); border-color: rgba(99,179,237,0.4); }
.tab-card:nth-child(6n+1)::before { background: #3182ce; }
.tab-card:nth-child(6n+1) i { color: #2b6cb0; }

.tab-card:nth-child(6n+2) { background: linear-gradient(135deg, rgba(154,230,180,0.25), rgba(72,187,120,0.12)); border-color: rgba(72,187,120,0.4); }
.tab-card:nth-child(6n+2)::before { background: #38a169; }
.tab-card:nth-child(6n+2) i { color: #276749; }

.tab-card:nth-child(6n+3) { background: linear-gradient(135deg, rgba(251,211,141,0.28), rgba(237,137,54,0.13)); border-color: rgba(237,137,54,0.35); }
.tab-card:nth-child(6n+3)::before { background: #dd6b20; }
.tab-card:nth-child(6n+3) i { color: #c05621; }

.tab-card:nth-child(6n+4) { background: linear-gradient(135deg, rgba(214,188,250,0.28), rgba(159,122,234,0.13)); border-color: rgba(159,122,234,0.4); }
.tab-card:nth-child(6n+4)::before { background: #805ad5; }
.tab-card:nth-child(6n+4) i { color: #6b46c1; }

.tab-card:nth-child(6n+5) { background: linear-gradient(135deg, rgba(254,178,178,0.25), rgba(245,101,101,0.12)); border-color: rgba(245,101,101,0.35); }
.tab-card:nth-child(6n+5)::before { background: #e53e3e; }
.tab-card:nth-child(6n+5) i { color: #c53030; }

.tab-card:nth-child(6n+6) { background: linear-gradient(135deg, rgba(144,205,244,0.25), rgba(0,188,212,0.12)); border-color: rgba(0,188,212,0.35); }
.tab-card:nth-child(6n+6)::before { background: #00bcd4; }
.tab-card:nth-child(6n+6) i { color: #00838f; }

.tab-card i { font-size: 1.25rem; margin-bottom: 10px; display: block; }
.tab-card h4 { font-size: 0.9rem; color: var(--primary); margin-bottom: 6px; font-family: 'Merriweather', serif; }
.tab-card p  { font-size: 0.8rem; color: var(--text-light); line-height: 1.6; }

/* ===== INCLUDES ===== */
.phd-includes { padding: 52px 0; background: var(--white); }
.includes-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  max-width: 960px;
  margin: 0 auto;
}
.include-item {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  border-radius: 12px;
  padding: 12px 14px;
  backdrop-filter: blur(8px);
  border: 1px solid rgba(255,255,255,0.5);
  box-shadow: 0 4px 16px rgba(0,0,0,0.07), inset 0 1px 0 rgba(255,255,255,0.6);
  transition: transform 0.2s;
}
.include-item:hover { transform: translateY(-3px); }
.include-item:nth-child(4n+1) { background: linear-gradient(135deg, rgba(99,179,237,0.18), rgba(49,130,206,0.08)); }
.include-item:nth-child(4n+2) { background: linear-gradient(135deg, rgba(154,230,180,0.2), rgba(72,187,120,0.08)); }
.include-item:nth-child(4n+3) { background: linear-gradient(135deg, rgba(214,188,250,0.2), rgba(159,122,234,0.08)); }
.include-item:nth-child(4n+4) { background: linear-gradient(135deg, rgba(251,211,141,0.22), rgba(237,137,54,0.08)); }
.include-item i { color: var(--accent); font-size: 1.1rem; margin-top: 2px; flex-shrink: 0; }
.include-item span { font-size: 0.82rem; color: var(--text); font-weight: 500; }

/* ===== ENROLL ===== */
.phd-enroll {
  padding: 52px 0;
  background: linear-gradient(135deg, #e8f0fe 0%, #fce4ec 30%, #e8f5e9 60%, #ede7f6 100%);
  position: relative;
  overflow: hidden;
}
.phd-enroll::before {
  content: '';
  position: absolute;
  top: -100px; left: -100px;
  width: 380px; height: 380px;
  background: radial-gradient(circle, rgba(99,179,237,0.18), transparent 70%);
  border-radius: 50%;
  pointer-events: none;
}
.phd-enroll::after {
  content: '';
  position: absolute;
  bottom: -80px; right: -80px;
  width: 340px; height: 340px;
  background: radial-gradient(circle, rgba(159,122,234,0.15), transparent 70%);
  border-radius: 50%;
  pointer-events: none;
}
.enroll-box {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  align-items: start;
  position: relative;
  z-index: 1;
}
.enroll-left { color: var(--primary); }
.enroll-left h2 { font-size: 1.6rem; color: var(--primary); margin-bottom: 10px; }
.enroll-left p  { color: var(--text-light); margin-bottom: 24px; font-size: 1rem; }
.enroll-price {
  display: flex;
  flex-direction: column;
  margin-bottom: 24px;
  background: rgba(255,255,255,0.55);
  backdrop-filter: blur(12px);
  border: 1.5px solid rgba(255,255,255,0.75);
  border-radius: 16px;
  padding: 14px 18px;
  box-shadow: 0 4px 20px rgba(99,130,210,0.1), inset 0 1px 0 rgba(255,255,255,0.9);
}
.enroll-amount { font-size: 2.1rem; font-weight: 700; color: var(--accent); font-family: 'Merriweather', serif; }
.enroll-desc   { font-size: 0.85rem; color: var(--text-light); margin-top: 4px; }
.enroll-perks  { display: flex; flex-direction: column; gap: 10px; }
.enroll-perks li {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.92rem;
  color: var(--text);
  background: rgba(255,255,255,0.5);
  backdrop-filter: blur(8px);
  border: 1px solid rgba(200,215,245,0.5);
  border-radius: 10px;
  padding: 8px 14px;
}
.enroll-perks li i { color: var(--accent); }

/* ===== GLASSY ENROLL FORM CARD ===== */
.enroll-right {
  background: rgba(255,255,255,0.55);
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);
  border-radius: 24px;
  padding: 0;
  border: 1.5px solid rgba(255,255,255,0.75);
  box-shadow:
    0 8px 40px rgba(99,130,210,0.13),
    0 2px 8px rgba(0,0,0,0.04),
    inset 0 1px 0 rgba(255,255,255,0.9);
  overflow: hidden;
}

/* Rainbow shimmer top bar */
.enroll-right::before {
  content: '';
  display: block;
  height: 4px;
  background: linear-gradient(90deg,
    #63b3ed 0%,
    #9f7aea 25%,
    #f687b3 50%,
    #68d391 75%,
    #f6ad55 100%);
}

/* Form header inside card */
.enroll-form-header {
  padding: 14px 22px 0;
  display: flex;
  align-items: center;
  gap: 10px;
}
.enroll-form-header i {
  font-size: 1.1rem;
  color: var(--accent);
}
.enroll-form-header span {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--primary);
}

.enroll-form-body {
  padding: 14px 22px 22px;
}

.enroll-form .form-group { margin-bottom: 14px; }
.enroll-form label {
  display: flex;
  align-items: center;
  gap: 5px;
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--primary);
  margin-bottom: 5px;
  letter-spacing: 0.01em;
}

/* Enroll input wrapper for icons */
.enroll-input-wrap {
  position: relative;
  display: flex;
  align-items: center;
}
.enroll-input-wrap i {
  position: absolute;
  left: 13px;
  color: #a0aec0;
  font-size: 0.82rem;
  pointer-events: none;
  transition: color 0.2s;
  z-index: 1;
}
.enroll-input-wrap:focus-within i { color: var(--primary); }
.enroll-input-wrap input,
.enroll-input-wrap select { padding-left: 36px !important; }

/* Glassy tinted inputs cycling 5 colors */
.enroll-form input,
.enroll-form select {
  width: 100%;
  padding: 10px 13px;
  border: 1.5px solid rgba(200,215,245,0.7);
  border-radius: 11px;
  font-size: 0.91rem;
  font-family: 'Inter', sans-serif;
  color: var(--text);
  background: rgba(255,255,255,0.55);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  transition: border-color 0.2s, box-shadow 0.2s, background 0.2s;
  box-shadow: inset 0 1px 3px rgba(0,0,0,0.04);
  outline: none;
}
.enroll-form input:focus,
.enroll-form select:focus {
  border-color: rgba(99,179,237,0.8);
  background: rgba(255,255,255,0.82);
  box-shadow: 0 0 0 3px rgba(99,179,237,0.15), inset 0 1px 3px rgba(0,0,0,0.03);
}
.enroll-form input::placeholder { color: #b8c4d8; font-size: 0.87rem; }

/* Per-field color tints */
.enroll-form .form-group:nth-child(1) input  { background: rgba(235,248,255,0.6); border-color: rgba(99,179,237,0.35); }
.enroll-form .form-group:nth-child(2) input  { background: rgba(250,245,255,0.6); border-color: rgba(159,122,234,0.35); }
.enroll-form .form-group:nth-child(3) input  { background: rgba(255,245,250,0.6); border-color: rgba(246,135,179,0.35); }
.enroll-form .form-group:nth-child(4) select { background: rgba(240,255,244,0.6); border-color: rgba(104,211,145,0.35); }
.enroll-form .form-group:nth-child(5) select { background: rgba(255,250,235,0.6); border-color: rgba(246,173,85,0.35); }

.enroll-submit-btn {
  width: 100%;
  text-align: center;
  margin-top: 8px;
  padding: 11px;
  border-radius: 10px;
  font-size: 0.92rem;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  background: linear-gradient(135deg, var(--accent), var(--accent-light));
  box-shadow: 0 4px 18px rgba(46,125,50,0.25);
  transition: transform 0.2s, box-shadow 0.2s;
  border: none;
  cursor: pointer;
  color: #fff;
  font-weight: 600;
  font-family: 'Inter', sans-serif;
}
.enroll-submit-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 28px rgba(46,125,50,0.35);
}

/* ===== RESPONSIVE ===== */

/* Tablet landscape */
@media (max-width: 1024px) {
  .phd-hero-inner  { gap: 36px; }
  .tab-grid        { grid-template-columns: repeat(2, 1fr); }
  .includes-grid   { grid-template-columns: repeat(2, 1fr); }
  .phd-tabs-section { padding: 56px 0; }
  .phd-includes    { padding: 60px 0; }
}

/* Tablet portrait */
@media (max-width: 900px) {
  .phd-hero-inner   { grid-template-columns: 1fr; gap: 32px; }
  .phd-hero-text h1 { font-size: 1.9rem; }
  .phd-hero-cards   { grid-template-columns: repeat(3, 1fr); }
  .enroll-box       { grid-template-columns: 1fr; gap: 32px; }
  .enroll-left h2   { font-size: 1.6rem; }
  .tab-header       { flex-direction: column; align-items: flex-start; gap: 14px; }
  .tab-header h2    { font-size: 1.3rem; }
  .tab-header       { padding: 18px 20px; }
}

/* Mobile */
@media (max-width: 768px) {
  .phd-hero         { padding: 52px 0 44px; }
  .phd-hero-text h1 { font-size: 1.45rem; }
  .phd-hero-text p  { font-size: 0.85rem; }
  .phd-hero-cards   { grid-template-columns: repeat(2, 1fr); gap: 10px; }
  .phd-hero-card    { padding: 14px 8px; }
  .phd-hero-card i  { font-size: 1.3rem; }
  .phd-price-tag    { padding: 12px 16px; }
  .phd-price-amount { font-size: 1.7rem; }

  .phd-tabs-section { padding: 36px 0; }
  .phd-tab-bar      { gap: 6px; }
  .phd-tab-btn      { padding: 7px 11px; font-size: 0.76rem; }
  .tab-grid         { grid-template-columns: 1fr; gap: 10px; }
  .tab-card         { padding: 16px 13px; }
  .tab-icon-big     { width: 44px; height: 44px; }
  .tab-icon-big i   { font-size: 1.3rem; }

  .phd-includes     { padding: 36px 0; }
  .includes-grid    { grid-template-columns: 1fr; gap: 8px; }

  .phd-enroll       { padding: 36px 0; }
  .enroll-right     { border-radius: 14px; }
  .enroll-form-body { padding: 13px 14px 18px; }
  .enroll-form-header { padding: 13px 14px 0; }
  .enroll-amount    { font-size: 1.8rem; }
  .enroll-price     { padding: 12px 14px; }
}

/* Small mobile */
@media (max-width: 480px) {
  .phd-hero         { padding: 36px 0 32px; }
  .phd-hero-text h1 { font-size: 1.4rem; line-height: 1.2; }
  .phd-hero-text p  { font-size: 0.88rem; }
  .phd-hero-cards   { grid-template-columns: repeat(2, 1fr); gap: 8px; }
  .phd-price-tag    { padding: 12px 16px; }
  .phd-price-amount { font-size: 1.8rem; }
  .phd-tab-btn      { padding: 7px 10px; font-size: 0.75rem; }
  .tab-icon-big     { width: 44px; height: 44px; }
  .tab-icon-big i   { font-size: 1.3rem; }
  .tab-card         { padding: 18px 14px; }
  .enroll-right     { border-radius: 14px; }
  .enroll-form-body { padding: 14px 14px 20px; }
  .enroll-form-header { padding: 14px 14px 0; }
  .enroll-amount    { font-size: 1.8rem; }
  .enroll-submit-btn { font-size: 0.92rem; padding: 12px; }
  .enroll-left h2   { font-size: 1.4rem; }
}

/* ===== 430px — iPhone 14 / Pro / Plus ===== */
@media (max-width: 430px) {
  /* Hero */
  .phd-hero           { padding: 22px 0 18px; }
  .phd-hero-text h1   { font-size: 1.2rem; line-height: 1.2; }
  .phd-hero-text p    { font-size: 0.8rem; margin-bottom: 12px; }
  .phd-price-tag      { padding: 10px 14px; border-radius: 10px; }
  .phd-price-label    { font-size: 0.7rem; }
  .phd-price-amount   { font-size: 1.6rem; }
  .phd-price-note     { font-size: 0.72rem; }
  .phd-hero-cards     { grid-template-columns: repeat(3, 1fr); gap: 6px; }
  .phd-hero-card      { padding: 10px 6px; border-radius: 10px; }
  .phd-hero-card i    { font-size: 1.1rem; margin-bottom: 4px; }
  .phd-hero-card p    { font-size: 0.62rem; }

  /* Tabs */
  .phd-tabs-section   { padding: 22px 0; }
  .phd-tab-bar        { gap: 5px; margin-bottom: 16px; }
  .phd-tab-btn        { padding: 6px 9px; font-size: 0.7rem; gap: 5px; border-radius: 20px; }
  .tab-header         { padding: 12px 13px; gap: 10px; margin-bottom: 14px; border-radius: 10px; }
  .tab-icon-big       { width: 38px; height: 38px; border-radius: 10px; }
  .tab-icon-big i     { font-size: 1.1rem; }
  .tab-header h2      { font-size: 1rem; }
  .tab-header p       { font-size: 0.78rem; }
  .tab-grid           { gap: 8px; }
  .tab-card           { padding: 14px 11px; border-radius: 10px; }
  .tab-card i         { font-size: 1rem; margin-bottom: 7px; }
  .tab-card h4        { font-size: 0.82rem; margin-bottom: 4px; }
  .tab-card p         { font-size: 0.72rem; }

  /* Includes */
  .phd-includes       { padding: 22px 0; }
  .includes-grid      { gap: 7px; }
  .include-item       { padding: 9px 11px; border-radius: 9px; gap: 9px; }
  .include-item i     { font-size: 0.9rem; }
  .include-item span  { font-size: 0.74rem; }

  /* Enroll */
  .phd-enroll         { padding: 22px 0; }
  .enroll-left h2     { font-size: 1.15rem; }
  .enroll-left p      { font-size: 0.8rem; margin-bottom: 14px; }
  .enroll-price       { padding: 11px 13px; border-radius: 11px; margin-bottom: 14px; }
  .enroll-amount      { font-size: 1.6rem; }
  .enroll-desc        { font-size: 0.72rem; }
  .enroll-perks li    { font-size: 0.78rem; padding: 6px 10px; border-radius: 8px; }
  .enroll-right       { border-radius: 11px; }
  .enroll-form-header { padding: 11px 13px 0; }
  .enroll-form-header span { font-size: 0.84rem; }
  .enroll-form-body   { padding: 11px 13px 16px; }
  .enroll-form input,
  .enroll-form select { font-size: 0.82rem; padding: 8px 10px; border-radius: 8px; }
  .enroll-input-wrap input,
  .enroll-input-wrap select { padding-left: 30px !important; }
  .enroll-input-wrap i { left: 9px; font-size: 0.74rem; }
  .enroll-submit-btn  { font-size: 0.84rem; padding: 10px; border-radius: 8px; }
}