/* ============================================
   GPA Calculator — gpa-calculator.css
   ============================================ */

.gpa-app { max-width: 100%; }

.gpa-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-xl);
    padding: 2rem;
    margin-bottom: 1.5rem;
}

.gpa-card-title {
    font-size: 1.3rem; font-weight: 700; color: var(--text-primary);
    margin-bottom: 1.5rem; padding-bottom: 0.75rem;
    border-bottom: 2px solid var(--border-color);
    display: flex; align-items: center;
}

/* ---- Grading System Selector ---- */
.gpa-system-btns {
    display: grid; grid-template-columns: repeat(4, 1fr); gap: 10px;
}

.gpa-system-btn {
    display: flex; flex-direction: column; align-items: center; text-align: center;
    padding: 16px 12px; background: var(--bg-secondary);
    border: 2px solid var(--border-color); border-radius: var(--radius-lg);
    cursor: pointer; transition: all .2s; gap: 6px;
}
.gpa-system-btn:hover { border-color: var(--brand-primary); }
.gpa-system-active {
    border-color: var(--brand-primary) !important;
    background: rgba(6,182,212,.06) !important;
    box-shadow: 0 0 0 3px rgba(6,182,212,.1);
}

.gpa-system-flag { font-size: 1.8rem; }
.gpa-system-name { font-size: .9rem; font-weight: 700; color: var(--text-primary); }
.gpa-system-desc { font-size: .7rem; color: var(--text-muted); line-height: 1.3; }

/* ---- Semester Tabs ---- */
.gpa-semester-header {
    display: flex; justify-content: space-between; align-items: center;
    margin-bottom: 1.5rem; flex-wrap: wrap; gap: 12px;
}

.gpa-semester-tabs { display: flex; gap: 6px; flex-wrap: wrap; }

.gpa-sem-tab {
    padding: 8px 18px; font-size: .85rem; font-weight: 700;
    color: var(--text-secondary); background: var(--bg-secondary);
    border: 2px solid var(--border-color); border-radius: var(--radius-md);
    cursor: pointer; transition: all .15s;
}
.gpa-sem-tab:hover { border-color: var(--brand-primary); color: var(--brand-primary); }
.gpa-sem-active {
    background: var(--brand-primary) !important;
    border-color: var(--brand-primary) !important;
    color: #fff !important;
}

.gpa-sem-add {
    width: 38px; padding: 8px; display: flex; align-items: center; justify-content: center;
    font-size: .9rem;
}

/* ---- Course Table ---- */
.gpa-courses-wrap { margin-bottom: 1rem; }

.gpa-courses-header {
    display: grid; grid-template-columns: 1fr 140px 80px 40px; gap: 10px;
    padding: 10px 14px; background: var(--bg-secondary);
    border: 1px solid var(--border-color); border-radius: var(--radius-md) var(--radius-md) 0 0;
    font-size: .75rem; font-weight: 700; color: var(--text-muted);
    text-transform: uppercase; letter-spacing: .04em;
}

.gpa-courses-body {
    border: 1px solid var(--border-color); border-top: none;
    border-radius: 0 0 var(--radius-md) var(--radius-md);
    max-height: 400px; overflow-y: auto;
}

.gpa-course-row {
    display: grid; grid-template-columns: 1fr 140px 80px 40px; gap: 10px;
    padding: 10px 14px; border-bottom: 1px solid var(--border-color);
    align-items: center; transition: background .1s;
}
.gpa-course-row:hover { background: rgba(6,182,212,.02); }
.gpa-course-row:last-child { border-bottom: none; }

.gpa-course-name {
    padding: 8px 10px; font-size: .9rem; font-weight: 600;
    color: var(--text-primary); background: var(--bg-input);
    border: 1px solid var(--border-color); border-radius: var(--radius-sm);
    outline: none; width: 100%; box-sizing: border-box;
}
.gpa-course-name:focus { border-color: var(--brand-primary); }

.gpa-course-grade {
    padding: 8px 6px; font-size: .85rem; font-weight: 600;
    color: var(--text-primary); background: var(--bg-input);
    border: 1px solid var(--border-color); border-radius: var(--radius-sm);
    outline: none; width: 100%; box-sizing: border-box;
    cursor: pointer;
}
.gpa-course-grade:focus { border-color: var(--brand-primary); }

.gpa-course-credits {
    padding: 8px 6px; font-size: .9rem; font-weight: 700;
    color: var(--text-primary); background: var(--bg-input);
    border: 1px solid var(--border-color); border-radius: var(--radius-sm);
    outline: none; width: 100%; box-sizing: border-box; text-align: center;
    font-family: 'JetBrains Mono', monospace;
}
.gpa-course-credits:focus { border-color: var(--brand-primary); }

.gpa-course-remove {
    width: 32px; height: 32px; border-radius: 50%; border: none;
    background: transparent; color: var(--text-muted); font-size: .85rem;
    cursor: pointer; transition: all .15s;
    display: flex; align-items: center; justify-content: center;
}
.gpa-course-remove:hover { background: rgba(239,68,68,.08); color: #ef4444; }

/* Add Course Button */
.gpa-add-course-btn {
    width: 100%; padding: 12px; font-size: .9rem; font-weight: 700;
    color: var(--brand-primary); background: transparent;
    border: 2px dashed var(--border-color); border-radius: var(--radius-md);
    cursor: pointer; transition: all .15s; margin-top: 8px;
    display: flex; align-items: center; justify-content: center;
}
.gpa-add-course-btn:hover { border-color: var(--brand-primary); background: rgba(6,182,212,.03); }

/* Quick Actions */
.gpa-quick-actions { display: flex; gap: 8px; margin-bottom: 1rem; }

.gpa-quick-btn {
    padding: 8px 16px; font-size: .8rem; font-weight: 600;
    color: var(--text-muted); background: var(--bg-secondary);
    border: 1px solid var(--border-color); border-radius: var(--radius-md);
    cursor: pointer; transition: all .15s;
}
.gpa-quick-btn:hover { border-color: var(--brand-primary); color: var(--brand-primary); }

/* Calculate Button */
.gpa-calculate-btn {
    width: 100%; padding: 16px; font-size: 1.15rem; font-weight: 700;
    color: #fff; border: none; border-radius: var(--radius-lg); cursor: pointer;
    background: linear-gradient(135deg, var(--brand-primary), #8b5cf6);
    box-shadow: 0 4px 15px rgba(6,182,212,.25);
    transition: all .2s; display: flex; align-items: center; justify-content: center;
}
.gpa-calculate-btn:hover { transform: translateY(-2px); box-shadow: 0 6px 25px rgba(6,182,212,.4); }

/* ---- Results Card ---- */
.gpa-results-card {
    border: 2px solid rgba(6,182,212,.15);
    background: linear-gradient(135deg, var(--bg-card), rgba(6,182,212,.02));
}

/* Hero GPA */
.gpa-hero { text-align: center; margin-bottom: 2rem; }

.gpa-hero-ring-wrap {
    position: relative; width: 200px; height: 200px; margin: 0 auto 1rem;
}

.gpa-hero-ring { width: 100%; height: 100%; transform: rotate(-90deg); }

.gpa-ring-bg { fill: none; stroke: var(--bg-tertiary); stroke-width: 12; }

.gpa-ring-fill {
    fill: none; stroke: url(#gpaGrad); stroke-width: 12;
    stroke-linecap: round;
    stroke-dasharray: 534; stroke-dashoffset: 534;
    transition: stroke-dashoffset 2s cubic-bezier(.4,0,.2,1);
}

.gpa-hero-center {
    position: absolute; top: 50%; left: 50%; transform: translate(-50%, -50%);
    display: flex; flex-direction: column; align-items: center;
}
.gpa-hero-value {
    font-size: 3rem; font-weight: 900; line-height: 1;
    background: linear-gradient(135deg, var(--brand-primary), #8b5cf6);
    -webkit-background-clip: text; -webkit-text-fill-color: transparent;
    background-clip: text; font-family: 'JetBrains Mono', monospace;
}
.gpa-hero-label {
    font-size: .8rem; font-weight: 700; color: var(--text-muted);
    text-transform: uppercase; letter-spacing: .06em;
}

.gpa-hero-class { font-size: 1.4rem; font-weight: 800; color: var(--text-primary); }
.gpa-hero-subtitle { font-size: .9rem; color: var(--text-muted); margin-top: 4px; }

/* Stats Grid */
.gpa-stats-grid {
    display: grid; grid-template-columns: repeat(4, 1fr); gap: 12px;
    margin-bottom: 2rem;
}

.gpa-stat-box {
    display: flex; align-items: center; gap: 12px; padding: 14px;
    background: var(--bg-card); border: 1px solid var(--border-color);
    border-radius: var(--radius-lg); transition: transform .2s;
}
.gpa-stat-box:hover { transform: translateY(-2px); }

.gpa-stat-icon {
    width: 42px; height: 42px; border-radius: 10px;
    display: flex; align-items: center; justify-content: center;
    font-size: 1rem; flex-shrink: 0;
}
.gpa-stat-cyan .gpa-stat-icon { background: rgba(6,182,212,.12); color: #06b6d4; }
.gpa-stat-blue .gpa-stat-icon { background: rgba(59,130,246,.12); color: #3b82f6; }
.gpa-stat-green .gpa-stat-icon { background: rgba(16,185,129,.12); color: #10b981; }
.gpa-stat-amber .gpa-stat-icon { background: rgba(245,158,11,.12); color: #f59e0b; }

.gpa-stat-data { display: flex; flex-direction: column; }
.gpa-stat-num { font-size: 1.1rem; font-weight: 800; color: var(--text-primary); line-height: 1.1; }
.gpa-stat-label { font-size: .7rem; font-weight: 600; color: var(--text-muted); text-transform: uppercase; letter-spacing: .04em; margin-top: 2px; }

/* Honours Badge */
.gpa-honours { text-align: center; margin-bottom: 2rem; }

.gpa-honours-badge {
    display: inline-flex; align-items: center; gap: 10px;
    padding: 12px 28px; font-size: 1.1rem; font-weight: 800;
    color: #f59e0b; background: rgba(245,158,11,.08);
    border: 2px solid rgba(245,158,11,.2); border-radius: 50px;
    animation: gpaGlow 2s ease-in-out infinite;
}
.gpa-honours-badge i { font-size: 1.3rem; }

@keyframes gpaGlow {
    0%, 100% { box-shadow: 0 0 10px rgba(245,158,11,.1); }
    50% { box-shadow: 0 0 25px rgba(245,158,11,.25); }
}

/* ---- Charts ---- */
.gpa-chart-section { margin-bottom: 2rem; }
.gpa-section-title { font-size: 1rem; font-weight: 700; color: var(--text-primary); margin-bottom: 1rem; }

.gpa-pie-container {
    display: flex; align-items: center; gap: 2rem; justify-content: center;
    flex-wrap: wrap;
}
#gpaPieChart { max-width: 260px; }

.gpa-pie-legend { display: flex; flex-direction: column; gap: 8px; }

.gpa-legend-item {
    display: flex; align-items: center; gap: 10px;
    padding: 8px 14px; background: var(--bg-secondary);
    border: 1px solid var(--border-color); border-radius: var(--radius-md);
    font-size: .85rem;
}
.gpa-legend-dot { width: 12px; height: 12px; border-radius: 50%; flex-shrink: 0; }
.gpa-legend-text { font-weight: 600; color: var(--text-secondary); min-width: 40px; }
.gpa-legend-count { font-weight: 800; color: var(--text-primary); font-family: 'JetBrains Mono', monospace; }
.gpa-legend-pct { font-size: .75rem; color: var(--text-muted); font-weight: 600; }

.gpa-chart-container {
    background: var(--bg-secondary); border: 1px solid var(--border-color);
    border-radius: var(--radius-lg); padding: 16px; height: 240px;
}

/* ---- Table ---- */
.gpa-table-wrap {
    overflow-x: auto; border: 1px solid var(--border-color);
    border-radius: var(--radius-md); max-height: 350px; overflow-y: auto;
}

.gpa-table { width: 100%; border-collapse: collapse; font-size: .85rem; }

.gpa-table th {
    padding: 12px 14px; background: var(--bg-secondary);
    font-weight: 700; color: var(--text-secondary); text-align: left;
    border-bottom: 2px solid var(--border-color);
    font-size: .75rem; text-transform: uppercase; letter-spacing: .04em;
    position: sticky; top: 0; z-index: 1;
}
.gpa-table td {
    padding: 10px 14px; border-bottom: 1px solid var(--border-color);
    color: var(--text-primary); font-size: .85rem;
}
.gpa-table td:nth-child(n+3) { font-family: 'JetBrains Mono', monospace; text-align: center; }
.gpa-table tbody tr:hover { background: rgba(6,182,212,.03); }
.gpa-table tbody tr:last-child td { border-bottom: none; }

.gpa-table-grade {
    display: inline-block; padding: 2px 10px; border-radius: 12px;
    font-weight: 700; font-size: .8rem;
}
.gpa-grade-a { background: rgba(16,185,129,.1); color: #10b981; }
.gpa-grade-b { background: rgba(59,130,246,.1); color: #3b82f6; }
.gpa-grade-c { background: rgba(245,158,11,.1); color: #f59e0b; }
.gpa-grade-d { background: rgba(249,115,22,.1); color: #f97316; }
.gpa-grade-f { background: rgba(239,68,68,.1); color: #ef4444; }

/* ---- Target GPA ---- */
.gpa-target-section { }
.gpa-target-hint { font-size: .85rem; color: var(--text-muted); margin-bottom: 1rem; }

.gpa-target-row { display: flex; gap: 12px; align-items: flex-end; flex-wrap: wrap; }

.gpa-target-field { display: flex; flex-direction: column; gap: 4px; }
.gpa-target-field label { font-size: .8rem; font-weight: 600; color: var(--text-secondary); }

.gpa-target-input {
    padding: 10px 14px; font-size: 1rem; font-weight: 700;
    color: var(--text-primary); background: var(--bg-input);
    border: 2px solid var(--border-color); border-radius: var(--radius-md);
    outline: none; width: 120px; box-sizing: border-box;
    font-family: 'JetBrains Mono', monospace;
}
.gpa-target-input:focus { border-color: var(--brand-primary); }

.gpa-target-btn {
    padding: 10px 20px; font-size: .9rem; font-weight: 700;
    color: #fff; background: var(--brand-primary);
    border: none; border-radius: var(--radius-md); cursor: pointer;
    transition: all .15s;
}
.gpa-target-btn:hover { background: var(--brand-secondary); }

.gpa-target-result {
    margin-top: 1rem; padding: 16px; background: var(--bg-secondary);
    border: 2px solid var(--border-color); border-radius: var(--radius-lg);
    font-size: .95rem; color: var(--text-secondary); line-height: 1.6;
}
.gpa-target-result strong { color: var(--text-primary); }

/* ---- Actions ---- */
.gpa-actions { display: flex; justify-content: center; gap: 12px; margin-top: 1.5rem; flex-wrap: wrap; }

.gpa-action-btn {
    padding: 12px 28px; font-size: 1rem; font-weight: 700;
    border: none; border-radius: var(--radius-lg); cursor: pointer;
    transition: all .2s; display: flex; align-items: center;
}
.gpa-action-primary {
    color: #fff; background: linear-gradient(135deg, #ef4444, #dc2626);
    box-shadow: 0 4px 15px rgba(239,68,68,.25);
}
.gpa-action-primary:hover { transform: translateY(-2px); }
.gpa-action-save {
    color: #fff; background: linear-gradient(135deg, #10b981, #059669);
    box-shadow: 0 4px 15px rgba(16,185,129,.25);
}
.gpa-action-save:hover { transform: translateY(-2px); }
.gpa-action-secondary {
    color: var(--text-secondary); background: var(--bg-secondary);
    border: 2px solid var(--border-color);
}
.gpa-action-secondary:hover { border-color: var(--brand-primary); color: var(--brand-primary); }

/* ---- Cumulative ---- */
.gpa-cumulative-hero { text-align: center; margin-bottom: 1.5rem; }
.gpa-cumulative-label { display: block; font-size: .8rem; font-weight: 600; color: var(--text-muted); text-transform: uppercase; letter-spacing: .05em; margin-bottom: 4px; }
.gpa-cumulative-value {
    display: block; font-size: 3rem; font-weight: 900;
    background: linear-gradient(135deg, var(--brand-primary), #8b5cf6);
    -webkit-background-clip: text; -webkit-text-fill-color: transparent;
    background-clip: text; font-family: 'JetBrains Mono', monospace;
}
.gpa-cumulative-class { display: block; font-size: 1.1rem; font-weight: 700; color: var(--text-primary); margin-top: 4px; }

.gpa-cumulative-grid {
    display: grid; grid-template-columns: repeat(auto-fill, minmax(180px, 1fr)); gap: 10px;
}

.gpa-cumulative-item {
    text-align: center; padding: 14px;
    background: var(--bg-secondary); border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
}
.gpa-cumulative-sem { font-size: .75rem; font-weight: 700; color: var(--text-muted); text-transform: uppercase; letter-spacing: .04em; margin-bottom: 4px; }
.gpa-cumulative-gpa { font-size: 1.5rem; font-weight: 900; color: var(--text-primary); font-family: 'JetBrains Mono', monospace; }
.gpa-cumulative-credits { font-size: .75rem; color: var(--text-muted); margin-top: 2px; }

/* ---- Share ---- */
.gpa-share-section { text-align: center; }
.gpa-share-note { font-size: .85rem; color: var(--text-muted); margin-bottom: 12px; }
.gpa-share-row { display: flex; justify-content: center; gap: 10px; }
.gpa-share-btn {
    width: 44px; height: 44px; border-radius: 50%; border: none;
    color: #fff; font-size: 1.1rem; cursor: pointer;
    display: flex; align-items: center; justify-content: center;
    transition: all .2s;
}
.gpa-share-btn:hover { transform: translateY(-3px); box-shadow: 0 4px 12px rgba(0,0,0,.2); }

/* ---- Steps ---- */
.gpa-steps-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 12px; }

.gpa-step-item {
    display: flex; align-items: flex-start; gap: 14px; padding: 16px;
    background: var(--bg-secondary); border: 1px solid var(--border-color);
    border-radius: var(--radius-md); transition: all .15s;
}
.gpa-step-item:hover { border-color: rgba(6,182,212,.3); }

.gpa-step-num {
    width: 36px; height: 36px; border-radius: 50%; flex-shrink: 0;
    display: flex; align-items: center; justify-content: center;
    font-size: .95rem; font-weight: 800; color: #fff;
    background: linear-gradient(135deg, var(--brand-primary), #8b5cf6);
}

.gpa-step-content { display: flex; flex-direction: column; }
.gpa-step-content strong { font-size: .9rem; color: var(--text-primary); margin-bottom: 3px; }
.gpa-step-content span { font-size: .8rem; color: var(--text-muted); line-height: 1.5; }

/* ---- Scale Reference ---- */
.gpa-scale-grid {
    display: grid; grid-template-columns: repeat(auto-fill, minmax(120px, 1fr)); gap: 8px;
}

.gpa-scale-item {
    text-align: center; padding: 12px 8px;
    background: var(--bg-secondary); border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
}
.gpa-scale-grade { font-size: 1.1rem; font-weight: 800; margin-bottom: 2px; }
.gpa-scale-points { font-size: .8rem; font-weight: 700; color: var(--text-muted); font-family: 'JetBrains Mono', monospace; }

/* ---- Info & FAQ ---- */
.gpa-info-block {
    padding: 1.25rem; background: var(--bg-secondary); border-radius: var(--radius-md);
    margin-bottom: 1rem; border-left: 4px solid var(--brand-primary);
}
.gpa-info-block:last-child { margin-bottom: 0; }
.gpa-info-block h3 { font-size: 1.05rem; font-weight: 700; color: var(--text-primary); margin-bottom: .5rem; }
.gpa-info-block p { font-size: .95rem; color: var(--text-secondary); margin-bottom: 0; line-height: 1.6; }

.gpa-faq-item { padding: 1.25rem; background: var(--bg-secondary); border-radius: var(--radius-md); margin-bottom: 1rem; }
.gpa-faq-item:last-child { margin-bottom: 0; }
.gpa-faq-item h3 { font-size: 1rem; font-weight: 700; color: var(--text-primary); margin-bottom: .5rem; }
.gpa-faq-item p { font-size: .95rem; color: var(--text-secondary); margin-bottom: 0; line-height: 1.6; }

/* ---- Responsive ---- */
@media (max-width: 991.98px) {
    .gpa-system-btns { grid-template-columns: repeat(2, 1fr); }
    .gpa-stats-grid { grid-template-columns: repeat(2, 1fr); }
    .gpa-steps-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 767.98px) {
    .gpa-card { padding: 1.25rem; }
    .gpa-system-btns { grid-template-columns: 1fr 1fr; }
    .gpa-stats-grid { grid-template-columns: 1fr 1fr; }
    .gpa-steps-grid { grid-template-columns: 1fr; }
    .gpa-hero-value { font-size: 2.5rem; }
    .gpa-pie-container { flex-direction: column; }
    .gpa-courses-header { grid-template-columns: 1fr 100px 60px 36px; gap: 6px; font-size: .65rem; }
    .gpa-course-row { grid-template-columns: 1fr 100px 60px 36px; gap: 6px; }
    .gpa-course-name { font-size: .8rem; padding: 6px 8px; }
    .gpa-course-grade { font-size: .8rem; padding: 6px 4px; }
    .gpa-course-credits { font-size: .8rem; padding: 6px 4px; }
    .gpa-actions { flex-direction: column; }
    .gpa-action-btn { width: 100%; justify-content: center; }
    .gpa-target-row { flex-direction: column; }
    .gpa-target-input { width: 100%; }
    .gpa-target-btn { width: 100%; }
    .gpa-semester-header { flex-direction: column; align-items: flex-start; }
    .gpa-cumulative-value { font-size: 2.5rem; }
}