/* ═══════════════════════════════════════════════════════════════════
   DESIGN.md — kiranvk.me v2.9.6
   Dark-first, light override. Fraunces + Nunito + Fira Code.
   Gold accent (#d4a853), snappy ease-out motion.
   ═══════════════════════════════════════════════════════════════════ */
:root{--bg-base:#0a0a0b;--bg-elevated:#111113;--bg-surface:#18181b;--bg-subtle:#1f1f23;--bg-muted:#27272a;--text-primary:#fafafa;--text-secondary:#a1a1aa;--text-muted:#71717a;--accent:#d4a853;--accent-muted:#b8943f;--accent-subtle:rgba(212,168,83,.15);--accent-secondary:#818cf8;--success:#4ade80;--success-subtle:rgba(74,222,128,.12);--error:#f87171;--error-subtle:rgba(248,113,113,.12);--warning:#fbbf24;--info:#60a5fa;--info-subtle:rgba(96,165,250,.12);--border-subtle:#27272a;--border-default:#3f3f46;--font-display:'Fraunces','Georgia',serif;--font-body:'Nunito',-apple-system,BlinkMacSystemFont,sans-serif;--font-mono:'Fira Code','Consolas',monospace;--radius-sm:4px;--radius-md:8px;--radius-lg:12px;--radius-xl:16px;--shadow-sm:0 1px 2px rgba(0,0,0,.4);--shadow-md:0 4px 16px rgba(0,0,0,.3);--shadow-lg:0 8px 32px rgba(0,0,0,.4);--shadow-glow:0 0 40px rgba(212,168,83,.08);--transition:cubic-bezier(.16,1,.3,1)}
[data-theme="light"]{--bg-base:#fafaf9;--bg-elevated:#fff;--bg-surface:#f5f5f4;--bg-subtle:#e7e5e4;--bg-muted:#d6d3d1;--text-primary:#1c1917;--text-secondary:#57534e;--text-muted:#78716c;--accent:#92400e;--accent-muted:#78350f;--accent-subtle:rgba(146,64,14,.1);--accent-secondary:#4f46e5;--success:#16a34a;--success-subtle:rgba(22,163,74,.08);--error:#dc2626;--error-subtle:rgba(220,38,38,.08);--info:#2563eb;--info-subtle:rgba(37,99,235,.08);--border-subtle:#e7e5e4;--border-default:#d6d3d1;--shadow-sm:0 1px 2px rgba(0,0,0,.05);--shadow-md:0 4px 16px rgba(0,0,0,.08);--shadow-lg:0 8px 32px rgba(0,0,0,.1);--shadow-glow:0 0 40px rgba(146,64,14,.05)}
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}html{scroll-behavior:smooth}
body{font-family:var(--font-body);background:var(--bg-base);color:var(--text-primary);line-height:1.75;font-size:1rem;min-height:100vh;display:flex;flex-direction:column;transition:background-color .3s var(--transition),color .3s var(--transition)}

/* Animations */
@keyframes fadeUp{from{opacity:0;transform:translateY(12px)}to{opacity:1;transform:translateY(0)}}
@keyframes fadeIn{from{opacity:0}to{opacity:1}}
@keyframes slideDown{from{opacity:0;transform:translateY(-8px)}to{opacity:1;transform:translateY(0)}}
@keyframes modalIn{from{opacity:0;transform:translateY(20px) scale(.97)}to{opacity:1;transform:translateY(0) scale(1)}}
@keyframes toastIn{from{transform:translateX(100%);opacity:0}to{transform:translateX(0);opacity:1}}
@keyframes toastOut{from{transform:translateX(0);opacity:1}to{transform:translateX(100%);opacity:0}}
@keyframes skeleton{0%{background-position:200% 0}100%{background-position:-200% 0}}

/* Breadcrumb */
.breadcrumb{padding:.6rem 1.5rem;font-size:.8rem;color:var(--text-muted);border-bottom:1px solid var(--border-subtle);display:flex;align-items:center;gap:.4rem}
.breadcrumb a{color:var(--accent);text-decoration:none;transition:color .15s}.breadcrumb a:hover{color:var(--accent-muted)}.breadcrumb .sep{color:var(--border-default)}

/* Header */
.header{position:relative;padding:2rem 1.5rem 1.5rem;text-align:center;border-bottom:1px solid var(--border-subtle)}
.header::before{content:'';position:absolute;top:0;left:0;right:0;height:1px;background:linear-gradient(90deg,transparent,var(--accent),transparent)}
.header::after{content:'';position:absolute;bottom:-1px;left:50%;transform:translateX(-50%);width:60px;height:1px;background:var(--accent)}
.header h1{font-family:var(--font-display);font-size:clamp(2rem,5vw,3rem);font-weight:400;font-style:italic;letter-spacing:-.03em;color:var(--text-primary);margin-bottom:.25rem}
.header p{color:var(--text-secondary);font-size:.9rem}
.header-actions{position:absolute;top:1rem;right:1.5rem;display:flex;gap:.5rem}
.theme-toggle{background:var(--bg-surface);border:1px solid var(--border-subtle);border-radius:var(--radius-md);width:38px;height:38px;display:flex;align-items:center;justify-content:center;cursor:pointer;color:var(--text-secondary);font-size:1.1rem;transition:all .3s var(--transition)}
.theme-toggle:hover{border-color:var(--accent);color:var(--accent)}.theme-toggle:focus-visible{outline:2px solid var(--accent);outline-offset:2px}

/* Tabs */
.tabs-container{padding:1rem 1.5rem 0;max-width:1100px;margin:0 auto;width:100%}
.tabs{display:flex;gap:0;border-bottom:1px solid var(--border-subtle)}
.tab-btn{font-family:var(--font-body);font-size:.9rem;font-weight:600;padding:.75rem 1.5rem;background:none;border:none;color:var(--text-muted);cursor:pointer;position:relative;transition:color .3s var(--transition)}
.tab-btn:focus-visible{outline:2px solid var(--accent);outline-offset:-2px;border-radius:var(--radius-sm)}
.tab-btn.active{color:var(--accent)}.tab-btn.active::after{content:'';position:absolute;bottom:-1px;left:0;right:0;height:2px;background:var(--accent);border-radius:1px 1px 0 0}
.tab-btn:hover:not(.active){color:var(--text-secondary)}

/* Main */
.main{flex:1;padding:1.5rem;max-width:1100px;margin:0 auto;width:100%}
.tab-panel{display:none}.tab-panel.active{display:block;animation:fadeIn .3s var(--transition)}

/* Stats */
.stats-bar{display:grid;grid-template-columns:repeat(auto-fit,minmax(140px,1fr));gap:1rem;margin-bottom:1.5rem}
.stat-card{background:var(--bg-surface);border:1px solid var(--border-subtle);border-radius:var(--radius-lg);padding:1rem 1.25rem;text-align:center;box-shadow:var(--shadow-sm);transition:border-color .3s var(--transition),transform .3s var(--transition)}
.stat-card:hover{border-color:var(--border-default);transform:translateY(-1px)}
.stat-card .stat-value{font-family:var(--font-display);font-size:1.75rem;font-weight:500;color:var(--accent)}
.stat-card .stat-label{font-size:.8rem;color:var(--text-muted);text-transform:uppercase;letter-spacing:.05em}

/* Search */
.search-wrap{margin-bottom:1rem;position:relative}
.search-input{width:100%;padding:.7rem 1rem .7rem 2.5rem;background:var(--bg-surface);border:1px solid var(--border-subtle);border-radius:var(--radius-md);color:var(--text-primary);font-family:var(--font-body);font-size:.9rem;outline:none;transition:border-color .3s var(--transition),box-shadow .3s var(--transition)}
.search-input::placeholder{color:var(--text-muted)}.search-input:focus{border-color:var(--accent);box-shadow:0 0 0 3px var(--accent-subtle)}
.search-icon{position:absolute;left:.85rem;top:50%;transform:translateY(-50%);color:var(--text-muted);font-size:.9rem;pointer-events:none}

/* Table */
.table-wrap{overflow-x:auto;background:var(--bg-surface);border:1px solid var(--border-subtle);border-radius:var(--radius-lg);box-shadow:var(--shadow-sm)}
.class-table{width:100%;border-collapse:collapse;font-size:.85rem}
.class-table th{padding:.75rem 1rem;text-align:left;font-weight:600;color:var(--text-secondary);background:var(--bg-subtle);border-bottom:1px solid var(--border-subtle);white-space:nowrap;font-size:.75rem;text-transform:uppercase;letter-spacing:.04em;position:sticky;top:0}
.class-table td{padding:.6rem 1rem;border-bottom:1px solid var(--border-subtle);vertical-align:middle}
.class-table tr:last-child td{border-bottom:none}.class-table tr{transition:background .15s}.class-table tr:hover td{background:var(--bg-subtle)}
.student-name{font-weight:600;color:var(--text-primary);white-space:nowrap}
.student-roll{color:var(--text-muted);font-family:var(--font-mono);font-size:.8rem}
.courses-cell{display:flex;flex-wrap:wrap;gap:.35rem}
.pill{display:inline-flex;align-items:center;gap:.25rem;padding:.2rem .6rem;border-radius:999px;font-size:.72rem;font-weight:600;white-space:nowrap;transition:transform .15s}.pill:hover{transform:scale(1.03)}
.pill-submitted{background:var(--accent-subtle);color:var(--accent);border:1px solid rgba(212,168,83,.3)}
.pill-pending{background:var(--bg-muted);color:var(--text-muted);border:1px solid var(--border-subtle)}
.pill-progress{background:var(--info-subtle);color:var(--info);border:1px solid rgba(96,165,250,.3)}

/* Login */
.login-panel{max-width:400px;margin:2rem auto;background:var(--bg-surface);border:1px solid var(--border-subtle);border-radius:var(--radius-lg);padding:2rem;box-shadow:var(--shadow-md);animation:fadeUp .5s var(--transition)}
.login-panel h2{font-family:var(--font-display);font-size:clamp(1.5rem,3vw,1.75rem);font-weight:500;margin-bottom:.25rem;text-align:center}
.login-hint{text-align:center;font-size:.8rem;color:var(--text-muted);margin-bottom:1.5rem}

/* Form */
.form-group{margin-bottom:1rem}
.form-group label{display:block;font-size:.8rem;font-weight:600;color:var(--text-secondary);margin-bottom:.3rem;text-transform:uppercase;letter-spacing:.03em}
.form-group select,.form-group input[type="password"],.form-group input[type="text"],.form-group input[type="number"],.form-group textarea{width:100%;padding:.65rem .85rem;background:var(--bg-base);border:1px solid var(--border-subtle);border-radius:var(--radius-md);color:var(--text-primary);font-family:var(--font-body);font-size:.9rem;outline:none;transition:border-color .3s var(--transition),box-shadow .3s var(--transition)}
.form-group select:focus,.form-group input:focus,.form-group textarea:focus{border-color:var(--accent);box-shadow:0 0 0 3px var(--accent-subtle)}
.form-group select{cursor:pointer;appearance:none;background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%23a1a1aa' stroke-width='2'%3E%3Cpath d='M6 9l6 6 6-6'/%3E%3C/svg%3E");background-repeat:no-repeat;background-position:right .75rem center;padding-right:2rem}
.form-group textarea{resize:vertical;min-height:70px}
.form-row{display:grid;grid-template-columns:1fr 1fr;gap:.75rem}

/* Buttons */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:.4rem;padding:.65rem 1.25rem;border:none;border-radius:var(--radius-md);font-family:var(--font-body);font-size:.85rem;font-weight:600;cursor:pointer;transition:all .3s var(--transition)}
.btn:focus-visible{outline:2px solid var(--accent);outline-offset:2px}.btn:active{transform:scale(.97)}
.btn-primary{background:var(--accent);color:#0a0a0b}.btn-primary:hover{background:var(--accent-muted);transform:translateY(-1px);box-shadow:var(--shadow-md)}
.btn-secondary{background:var(--bg-muted);color:var(--text-primary);border:1px solid var(--border-default)}.btn-secondary:hover{border-color:var(--accent);color:var(--accent)}
.btn-sm{padding:.45rem .85rem;font-size:.78rem}.btn-full{width:100%}.btn:disabled{opacity:.5;cursor:not-allowed;transform:none!important}

/* Alerts & Toast */
.alert{padding:.75rem 1rem;border-radius:var(--radius-md);font-size:.85rem;display:none;align-items:center;gap:.5rem;margin-bottom:1rem;animation:slideDown .3s var(--transition)}
.alert.visible{display:flex}
.alert-error{background:var(--error-subtle);color:var(--error);border:1px solid rgba(248,113,113,.2)}
.alert-success{background:var(--success-subtle);color:var(--success);border:1px solid rgba(74,222,128,.2)}
.toast-container{position:fixed;top:1rem;right:1rem;z-index:9999;display:flex;flex-direction:column;gap:.5rem;pointer-events:none}
.toast{pointer-events:auto;background:var(--bg-elevated);border:1px solid var(--border-subtle);border-radius:var(--radius-md);padding:.75rem 1.25rem;font-size:.85rem;box-shadow:var(--shadow-lg);display:flex;align-items:center;gap:.5rem;animation:toastIn .3s var(--transition);max-width:360px}
.toast.leaving{animation:toastOut .3s var(--transition) forwards}
.toast-success{border-left:3px solid var(--success)}.toast-error{border-left:3px solid var(--error)}.toast-info{border-left:3px solid var(--info)}

/* Dashboard */
.dashboard-header{display:flex;align-items:center;justify-content:space-between;margin-bottom:1.5rem;flex-wrap:wrap;gap:.75rem}
.dashboard-header h2{font-family:var(--font-display);font-size:clamp(1.5rem,3vw,2rem);font-weight:500}
.course-cards{display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:1rem}
.course-card{background:var(--bg-surface);border:1px solid var(--border-subtle);border-radius:var(--radius-lg);padding:1.25rem;box-shadow:var(--shadow-sm);transition:border-color .3s var(--transition),box-shadow .3s var(--transition),transform .3s var(--transition);animation:fadeUp .5s var(--transition) both}
.course-card:hover{border-color:var(--border-default);box-shadow:var(--shadow-md);transform:translateY(-2px)}
.course-card:nth-child(2){animation-delay:50ms}.course-card:nth-child(3){animation-delay:100ms}.course-card:nth-child(4){animation-delay:150ms}
.course-card-title{font-weight:700;font-size:.95rem;margin-bottom:.3rem;color:var(--text-primary)}
.course-card-meta{font-size:.8rem;color:var(--text-muted);margin-bottom:.75rem}
.course-card-status{display:inline-flex;align-items:center;gap:.3rem;font-size:.75rem;font-weight:600;padding:.2rem .5rem;border-radius:999px;margin-bottom:.75rem}
.status-submitted{background:var(--accent-subtle);color:var(--accent)}.status-pending{background:var(--bg-muted);color:var(--text-muted)}.status-progress{background:var(--info-subtle);color:var(--info)}
.cert-link{font-size:.8rem;color:var(--accent);text-decoration:none;display:inline-flex;align-items:center;gap:.2rem;transition:color .3s var(--transition)}.cert-link:hover{color:var(--accent-muted);text-decoration:underline}
.course-card-actions{margin-top:.75rem;display:flex;gap:.5rem}

/* Modal */
.modal-overlay{display:none;position:fixed;inset:0;background:rgba(0,0,0,.6);backdrop-filter:blur(4px);z-index:1000;align-items:center;justify-content:center;padding:1rem}
.modal-overlay.open{display:flex}
.modal{background:var(--bg-elevated);border:1px solid var(--border-subtle);border-radius:var(--radius-xl);padding:2rem;width:100%;max-width:520px;max-height:85vh;overflow-y:auto;box-shadow:var(--shadow-lg);position:relative;animation:modalIn .3s var(--transition)}
.modal-title{font-family:var(--font-display);font-size:1.5rem;font-weight:500;margin-bottom:1.25rem}
.modal-close{position:absolute;top:1rem;right:1.25rem;background:none;border:none;color:var(--text-muted);font-size:1.5rem;cursor:pointer;transition:color .2s;line-height:1}.modal-close:hover{color:var(--text-primary)}
.prev-data{background:var(--bg-subtle);border:1px solid var(--border-subtle);border-radius:var(--radius-md);padding:.75rem 1rem;margin-bottom:1rem;font-size:.8rem;color:var(--text-secondary)}
.prev-data-title{font-weight:700;margin-bottom:.3rem;color:var(--text-muted);font-size:.7rem;text-transform:uppercase;letter-spacing:.04em}
.file-upload{border:2px dashed var(--border-default);border-radius:var(--radius-md);padding:1.25rem;text-align:center;cursor:pointer;transition:border-color .3s var(--transition),background .3s var(--transition)}
.file-upload:hover{border-color:var(--accent);background:var(--accent-subtle)}.file-upload input{display:none}
.file-upload-text{font-size:.8rem;color:var(--text-muted)}.file-upload-text strong{color:var(--accent)}

/* Footer */
.footer{text-align:center;padding:2rem 1.5rem;border-top:1px solid var(--border-subtle);color:var(--text-muted);font-size:.8rem;margin-top:auto}
.footer a{color:var(--accent);text-decoration:none}.footer a:hover{text-decoration:underline}

/* Utility */
.empty-state{text-align:center;padding:3rem 1rem;color:var(--text-muted)}.empty-state-icon{font-size:2.5rem;margin-bottom:.75rem;opacity:.5}
.skeleton{background:linear-gradient(90deg,var(--bg-subtle) 25%,var(--bg-muted) 50%,var(--bg-subtle) 75%);background-size:200% 100%;animation:skeleton 1.5s infinite;border-radius:var(--radius-sm);height:1rem;margin:.25rem 0}

/* Responsive */
@media(max-width:768px){.header{padding:1.5rem 1rem 1rem}.header h1{font-size:1.75rem}.main{padding:1rem}.stats-bar{grid-template-columns:repeat(2,1fr)}.course-cards{grid-template-columns:1fr}.form-row{grid-template-columns:1fr}.tab-btn{padding:.6rem 1rem;font-size:.82rem}.class-table{font-size:.78rem}.class-table th,.class-table td{padding:.5rem .6rem}.header-actions{top:.75rem;right:.75rem}.breadcrumb{padding:.5rem 1rem}}
@media(max-width:480px){.stats-bar{grid-template-columns:1fr 1fr;gap:.5rem}.stat-card{padding:.75rem}.stat-card .stat-value{font-size:1.4rem}.dashboard-header{flex-direction:column;align-items:flex-start}.modal{padding:1.5rem}}
::-webkit-scrollbar{width:6px;height:6px}::-webkit-scrollbar-track{background:var(--bg-base)}::-webkit-scrollbar-thumb{background:var(--border-default);border-radius:3px}::-webkit-scrollbar-thumb:hover{background:var(--text-muted)}