/* =====================================================
   Atlas Toolkit v1.0
   Apple-inspired Design System
   File: style.css

   Author: Atlas Toolkit
   Purpose:
   Global styling shared across every page.

===================================================== */

/* =====================================================
   GOOGLE FONT FALLBACK
===================================================== */

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

/* =====================================================
   LIGHT THEME
===================================================== */

:root {

  --bg: #ffffff;
  --surface: #f8fafc;
  --surface-2: #ffffff;

  --text: #0f172a;
  --muted: #64748b;

  --accent: #2563eb;
  --accent-hover: #1d4ed8;

  --border: #e2e8f0;

  --success: #16a34a;
  --warning: #ea580c;
  --danger: #dc2626;

  --shadow:
      0 10px 30px rgba(15,23,42,.06);

}

/* =====================================================
   DARK MODE
===================================================== */

@media (prefers-color-scheme: dark){

:root{

  --bg:#0b1220;
  --surface:#111827;
  --surface-2:#172032;

  --text:#f8fafc;
  --muted:#94a3b8;

  --border:#273449;

  --shadow:
      0 10px 35px rgba(0,0,0,.45);

}

}

/* =====================================================
   BASE
===================================================== */

html{

  scroll-behavior:smooth;

}

body{

  margin:0;

  font-family:
  "Inter",
  -apple-system,
  BlinkMacSystemFont,
  "Segoe UI",
  sans-serif;

  background:var(--bg);

  color:var(--text);

  transition:
  background .3s,
  color .3s;

}

/* =====================================================
   LAYOUT
===================================================== */

.app{

  max-width:760px;

  margin:auto;

  padding:

  48px
  24px
  60px;

}

/* =====================================================
   HEADER
===================================================== */

.topbar{

  margin-bottom:48px;

}

.brand{

  font-size:34px;

  font-weight:700;

  letter-spacing:-1px;

}

.subtitle{

  margin-top:8px;

  color:var(--muted);

  font-size:15px;

}

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

.hero{

  margin-bottom:36px;

}

.hero h1{

  font-size:40px;

  line-height:1.1;

  letter-spacing:-1.2px;

  margin-bottom:10px;

}

.hero p{

  color:var(--muted);

  font-size:17px;

  line-height:1.6;

}

/* =====================================================
   TOOL GRID
===================================================== */

.grid{

  display:grid;

  gap:18px;

}

.tool-card{

  background:var(--surface);

  border:1px solid var(--border);

  border-radius:22px;

  padding:22px;

  cursor:pointer;

  transition:

  transform .22s,

  border-color .22s,

  box-shadow .22s;

}

.tool-card:hover{

  transform:translateY(-3px);

  border-color:var(--accent);

  box-shadow:var(--shadow);

}

.tool-card.disabled{

  opacity:.45;

  cursor:not-allowed;

}

.tool-card.disabled:hover{

  transform:none;

  border-color:var(--border);

  box-shadow:none;

}

.icon{

  font-size:26px;

  margin-bottom:10px;

}

.tool-title{

  font-size:18px;

  font-weight:600;

}

.tool-desc{

  color:var(--muted);

  margin-top:6px;

  line-height:1.5;

}

label{

  display:block;

  margin-bottom:8px;

  color:var(--muted);

  font-size:14px;

  font-weight:500;

}

input{

  width:100%;

  padding:15px;

  font-size:16px;

  color:var(--text);

  background:var(--surface-2);

  border:1px solid var(--border);

  border-radius:16px;

  outline:none;

  transition:

  border-color .2s,

  box-shadow .2s,

  transform .15s;

}

input::placeholder{

  color:#94a3b8;

}

input:focus{

  border-color:var(--accent);

  box-shadow:

  0 0 0 4px rgba(37,99,235,.12);

}

/* =====================================================
   BUTTON
===================================================== */

button{

  width:100%;

  border:none;

  border-radius:16px;

  padding:16px;

  margin-top:8px;

  background:var(--accent);

  color:white;

  font-size:16px;

  font-weight:600;

  cursor:pointer;

  transition:

  background .2s,

  transform .15s,

  box-shadow .2s;

}

button:hover {
    transform: translateY(-2px);
    box-shadow: 0 14px 28px rgba(37,99,235,.22);
}

button:active {
    transform: translateY(0px) scale(0.98);
}

/* =====================================================
   RESULT CARD
===================================================== */

.result-card{

  margin-top:26px;

  padding:24px;

  background:var(--surface-2);

  border:1px solid var(--border);

  border-radius:22px;

  text-align:center;

  opacity:0;

  transform:translateY(8px) scale(0.98);

  transition:

  opacity .25s,

  transform .25s;

}

.result-card.show{

  opacity:1;

  transform:translateY(0) scale(1);

}

.result{

  font-size:48px;

  font-weight:700;

  letter-spacing:-2px;

}

.hint{

  margin-top:8px;

  color:var(--muted);

  line-height:1.5;

}

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

.footer{

  margin-top:42px;

  text-align:center;

  color:var(--muted);

  font-size:13px;

}

/* =====================================================
   MOBILE
===================================================== */

@media (max-width:640px){

.app{

padding:28px 18px 40px;

}

.hero h1{

font-size:32px;

}

.brand{

font-size:28px;

}

.card{

padding:22px;

}

.result{

font-size:40px;

}

}

/* =====================================================
   INPUT GROUPS
===================================================== */

.input-group {

    position: relative;

}

.input-group input {

    padding-right: 42px;

}

.input-group span {

    position: absolute;

    right: 16px;

    top: 50%;

    transform: translateY(-50%);

    color: var(--muted);

    font-weight: 600;

    pointer-events: none;

}

/* =====================================================
   CALCULATOR CARD
===================================================== */

.card{

  background:var(--surface);

  border:1px solid var(--border);

  border-radius:28px;

  padding:30px;

  box-shadow:var(--shadow);

}

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

.field{

  margin-bottom:20px;

}

/* =====================================================
   GPA CALCULATOR STYLES
===================================================== */

/* ---------- Dropdown Inputs ---------- */

select {

    width: 100%;

    padding: 14px 16px;

    border-radius: 14px;

    border: 1px solid var(--border);

    background: var(--surface);

    color: var(--text);

    font-size: 15px;

    font-family: inherit;

    outline: none;

    transition:
        border-color .2s ease,
        box-shadow .2s ease,
        transform .15s ease;

    appearance: none;

    cursor: pointer;

}

select:hover {

    border-color: var(--accent);

}

select:focus {

    border-color: var(--accent);

    box-shadow: 0 0 0 4px rgba(37,99,235,.12);

}

/* ---------- Course List ---------- */

.course-list{

    display:flex;

    flex-direction:column;

    gap:18px;

    margin-top:30px;

}

/* ---------- Individual Course Card ---------- */

.course-card{

    background:var(--surface);

    border:1px solid var(--border);

    border-radius:20px;

    padding:20px;

    transition:
        transform .2s ease,
        box-shadow .2s ease,
        border-color .2s ease;

    animation:fadeUp .25s ease;

}

.course-card:hover{

    transform:translateY(-3px);

    box-shadow:0 14px 28px rgba(0,0,0,.08);

    border-color:var(--accent);

}

/* ---------- Card Header ---------- */

.course-header{

    display:flex;

    justify-content:space-between;

    align-items:center;

    margin-bottom:18px;

}

.course-title{

    font-size:19px;

    font-weight:600;

    color:var(--text);

    letter-spacing:-0.4px;

}

/* ---------- Delete Button ---------- */

.delete-btn{

    width:36px;

    height:36px;

    border:none;

    border-radius:10px;

    background:transparent;

    color:#ef4444;

    font-size:18px;

    cursor:pointer;

    transition:.2s ease;

}

.delete-btn:hover{

    background:rgba(239,68,68,.10);

    transform:scale(1.08);

}

/* ---------- Grade + Credits ---------- */

.course-details{

    display:grid;

    grid-template-columns:1fr 1fr;

    gap:16px;

}

.detail-box{

    background:var(--bg);

    border:1px solid var(--border);

    border-radius:14px;

    padding:14px;

}

.detail-label{

    font-size:12px;

    color:var(--muted);

    margin-bottom:6px;

    text-transform:uppercase;

    letter-spacing:.8px;

}

.detail-value{

    font-size:18px;

    font-weight:600;

    color:var(--text);

}

/* ---------- GPA Result Card ---------- */

.result-label{

    font-size:14px;

    color:var(--muted);

    margin-bottom:8px;

}

#gpaResult{

    font-size:56px;

    font-weight:700;

    letter-spacing:-2px;

    color:var(--accent);

    margin-bottom:8px;

}

#gpaHint{

    font-size:14px;

    color:var(--muted);

}

/* ---------- Empty State ---------- */

.empty-state{

    text-align:center;

    padding:50px 20px;

    border:2px dashed var(--border);

    border-radius:20px;

    color:var(--muted);

    font-size:15px;

}

@keyframes fadeUp{

    from{

        opacity:0;

        transform:translateY(12px);

    }

    to{

        opacity:1;

        transform:translateY(0);

    }

}

/* ---------- Mobile ---------- */

@media (max-width:700px){

    .course-details{

        grid-template-columns:1fr;

    }

    #gpaResult{

        font-size:46px;

    }

}

/* =====================================================
   COLLEGE COST CALCULATOR STYLES
===================================================== */

/* ---------- Searchable Dropdown ---------- */

.searchable-dropdown {

    position: relative;

}

.searchable-dropdown input {

    width: 100%;

}

.dropdown-list {

    display: none;

    position: absolute;

    top: 100%;

    left: 0;

    right: 0;

    margin-top: 8px;

    background: var(--surface-2);

    border: 1px solid var(--border);

    border-radius: 14px;

    box-shadow: var(--shadow);

    max-height: 300px;

    overflow-y: auto;

    z-index: 1000;

}

.dropdown-list.active {

    display: block;

}

.dropdown-item {

    padding: 12px 16px;

    cursor: pointer;

    border-bottom: 1px solid var(--border);

    transition: background .15s;

}

.dropdown-item:last-child {

    border-bottom: none;

}

.dropdown-item:hover:not(.disabled) {

    background: var(--surface);

}

.dropdown-item.disabled {

    cursor: not-allowed;

    color: var(--muted);

}

.college-name {

    font-weight: 600;

    color: var(--text);

    font-size: 15px;

}

.college-location {

    font-size: 13px;

    color: var(--muted);

    margin-top: 4px;

}

.highlight {

    color: var(--accent);

    font-weight: 600;

}

/* ---------- College Info Display ---------- */

.college-info {

    background: var(--surface);

    border: 1px solid var(--border);

    border-radius: 16px;

    padding: 16px;

    margin-bottom: 20px;

}

.college-info.hidden {

    display: none;

}

.info-item {

    display: flex;

    justify-content: space-between;

    align-items: center;

}

.info-item .label {

    color: var(--muted);

    font-size: 14px;

}

.info-item .value {

    font-weight: 600;

    color: var(--text);

}

/* ---------- Button Groups (Toggle Buttons) ---------- */

.button-group {

    display: grid;

    grid-template-columns: repeat(auto-fit, minmax(100px, 1fr));

    gap: 10px;

    margin-top: 10px;

}

.toggle-btn {

    background: var(--surface);

    color: var(--text);

    border: 2px solid var(--border);

    border-radius: 12px;

    padding: 12px;

    font-size: 14px;

    font-weight: 600;

    cursor: pointer;

    transition: all .2s;

    margin-top: 0;

    width: 100%;

}

.toggle-btn:hover {

    border-color: var(--accent);

    box-shadow: none;

    transform: none;

}

.toggle-btn.active {

    background: var(--accent);

    color: white;

    border-color: var(--accent);

}

.toggle-btn.active:hover {

    box-shadow: 0 8px 20px rgba(37,99,235,.2);

    transform: translateY(-2px);

}

/* ---------- Cost Breakdown ---------- */

.cost-breakdown {

    margin-top: 24px;

    padding-top: 20px;

    border-top: 1px solid var(--border);

}

.breakdown-item {

    display: flex;

    justify-content: space-between;

    align-items: center;

    padding: 10px 0;

    font-size: 15px;

}

.breakdown-item.hidden {

    display: none;

}

.breakdown-label {

    color: var(--muted);

    font-weight: 500;

}

.breakdown-value {

    font-weight: 600;

    color: var(--text);

}

/* ---------- Hidden Utility ---------- */

.hidden {

    display: none !important;

}

/* ---------- Mobile Dropdown ---------- */

@media (max-width: 640px) {

    .dropdown-list {

        max-height: 250px;

    }

    .button-group {

        grid-template-columns: 1fr 1fr;

    }

}