:root{color-scheme:dark;--bg:#0b1120;--panel:#131d32;--panel2:#17233b;--line:#263551;--text:#f2f5ff;--muted:#99a7bf;--cyan:#53e2dc;--violet:#a794ff;--green:#77e7ac;--red:#ff8e9c;font-family:Inter,ui-sans-serif,system-ui,-apple-system,"Segoe UI",sans-serif}*{box-sizing:border-box}body{margin:0;min-height:100vh;background:radial-gradient(ellipse at 80% -10%,#202550 0,transparent 42%),var(--bg);color:var(--text)}button,a{-webkit-tap-highlight-color:transparent}.shell{max-width:1020px;margin:auto;padding:28px 28px 22px}.topbar{display:flex;align-items:center;gap:18px;border-bottom:1px solid rgba(153,167,191,.13);padding-bottom:18px}.brand{display:flex;align-items:center;gap:10px;color:var(--text);text-decoration:none;font-size:.85rem;font-weight:800;letter-spacing:.18em}.brand-mark{width:32px;height:32px;display:grid;place-items:center;border-radius:10px;background:linear-gradient(140deg,var(--cyan),#8fa0ff);color:#0b1120;font-size:1.05rem;letter-spacing:0}.today{margin-left:auto;color:var(--muted);font-size:.82rem}.home-button{width:40px;height:40px;border:1px solid var(--line);border-radius:12px;background:var(--panel);color:var(--text);font-size:1.35rem;cursor:pointer;transition:.18s}.home-button:hover,.home-button:focus-visible{border-color:var(--cyan);color:var(--cyan)}.intro{display:flex;align-items:center;justify-content:space-between;gap:24px;padding:38px 0 27px}.eyebrow{margin:0;color:#9daecc;font-size:.69rem;font-weight:750;letter-spacing:.16em}.intro h1{margin:9px 0 7px;font-size:clamp(2rem,5vw,3.05rem);line-height:1.1;letter-spacing:-.045em}.accent{color:var(--cyan)}.subtitle{margin:0;color:var(--muted);font-size:.97rem}.streak{display:flex;align-items:center;gap:12px;padding:13px 17px;background:rgba(23,35,59,.76);border:1px solid var(--line);border-radius:16px}.streak>span{color:#ffcb73;font-size:1.5rem}.streak strong,.streak small{display:block}.streak strong{font-size:1.25rem}.streak small{margin-top:2px;color:var(--muted);font-size:.72rem}.dashboard{display:grid;grid-template-columns:.8fr 1.2fr;gap:15px}.card{background:linear-gradient(145deg,rgba(23,35,59,.98),rgba(17,27,46,.98));border:1px solid var(--line);border-radius:19px}.points-card,.progress-card{min-height:164px;padding:20px 22px}.card-heading{display:flex;align-items:center;gap:10px}.icon-badge{width:31px;height:31px;display:grid;place-items:center;border-radius:10px;font-size:1rem}.violet{color:var(--violet);background:#a794ff1c}.cyan{color:var(--cyan);background:#53e2dc1c}.metric{margin:13px 0 3px;font-size:2.5rem;line-height:1;font-weight:750;letter-spacing:-.05em}.metric-unit{margin-left:7px;color:var(--muted);font-size:.94rem;font-weight:500;letter-spacing:0}.muted{margin:0;color:var(--muted);font-size:.8rem}.progress-copy{display:flex;justify-content:space-between;margin:20px 0 9px;font-size:.85rem}.progress-copy span{color:var(--cyan);font-weight:700}.progress-track{height:9px;overflow:hidden;border-radius:99px;background:#26334d}.progress-track span{display:block;width:0;height:100%;border-radius:inherit;background:linear-gradient(90deg,#6d87ff,var(--cyan));transition:width .35s ease}.progress-card .muted{margin-top:11px}.quiz-section{margin-top:33px}.section-heading{display:flex;align-items:end;justify-content:space-between;margin-bottom:13px}.section-heading h2{margin:5px 0 0;font-size:1.35rem;letter-spacing:-.025em}.question-count{padding:6px 10px;border:1px solid var(--line);border-radius:99px;color:var(--muted);font-size:.73rem}.quiz-card{padding:23px 24px 21px}.quiz-top{display:flex;align-items:center;justify-content:space-between}.question-tag,.points-tag{font-size:.68rem;font-weight:750;letter-spacing:.12em}.question-tag{color:var(--cyan)}.points-tag{color:var(--violet);letter-spacing:.03em}.quiz-card h3{max-width:690px;margin:17px 0 18px;font-size:clamp(1.18rem,3vw,1.45rem);line-height:1.42;font-weight:650}.answers{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:10px}.answer-button{min-height:53px;padding:12px 15px;text-align:left;border:1px solid #31415e;border-radius:12px;background:#111a2c;color:var(--text);font:inherit;font-size:.88rem;cursor:pointer;transition:border-color .18s,background .18s,transform .18s}.answer-button:hover:not(:disabled){transform:translateY(-1px);border-color:#61769d;background:#1a2842}.answer-button:focus-visible,.next-button:focus-visible,.restart-button:focus-visible,.home-button:focus-visible{outline:3px solid #53e2dc88;outline-offset:2px}.answer-button:disabled{cursor:default}.answer-button.correct{border-color:#55d99a;background:#18372f}.answer-button.incorrect{border-color:#ff8290;background:#3a2532}.feedback{min-height:21px;margin:14px 0 0;font-size:.83rem;font-weight:600}.feedback.success{color:var(--green)}.feedback.error{color:var(--red)}.next-button,.restart-button{border:0;border-radius:11px;background:var(--cyan);color:#081721;font:inherit;font-weight:750;cursor:pointer;transition:filter .18s}.next-button{padding:12px 16px}.next-button:hover,.restart-button:hover{filter:brightness(1.08)}.next-button span{margin-left:8px}.empty-state{padding:38px 22px;text-align:center;background:linear-gradient(145deg,#17263b,#131d32);border:1px solid var(--line);border-radius:19px}.empty-icon{display:grid;place-items:center;width:54px;height:54px;margin:auto auto 14px;border-radius:17px;background:#77e7ac20;color:var(--green);font-size:1.6rem}.empty-state h3{margin:0 0 7px;font-size:1.3rem}.empty-state p{margin:0 0 19px;color:var(--muted);font-size:.88rem}.restart-button{padding:12px 20px}footer{display:flex;align-items:center;gap:8px;margin-top:21px;color:#8190aa;font-size:.73rem}.footer-dot{width:7px;height:7px;border-radius:99px;background:var(--green);box-shadow:0 0 10px #77e7ac80}button[hidden],[hidden]{display:none!important}@media(max-width:640px){.shell{padding:17px 16px 20px}.today{font-size:.73rem}.intro{align-items:flex-start;padding:30px 0 22px}.intro h1{font-size:2.15rem}.subtitle{max-width:270px;font-size:.86rem;line-height:1.5}.streak{gap:8px;padding:10px 11px}.dashboard{grid-template-columns:1fr 1.15fr;gap:10px}.points-card,.progress-card{min-height:150px;padding:16px 14px}.metric{font-size:2.15rem}.progress-copy{margin-top:21px;font-size:.77rem}.quiz-section{margin-top:27px}.quiz-card{padding:19px 16px}.answers{grid-template-columns:1fr;gap:8px}.answer-button{min-height:50px}.question-count{font-size:.67rem}}@media(max-width:380px){.streak{padding:8px}.streak small{font-size:.64rem}.dashboard{grid-template-columns:1fr}.points-card,.progress-card{min-height:auto}.points-card{padding-bottom:18px}.metric{margin-top:10px}}
/* Temporizador, recordatorios y racha */
.streak{display:flex;align-items:center;gap:12px;padding:12px 16px;background:rgba(23,35,59,.76);border:1px solid var(--line);border-radius:16px}.streak>span{color:#ffcb73;font-size:1.45rem}.streak strong,.streak small{display:block}.streak strong{font-size:1.2rem}.streak small{margin-top:2px;color:var(--muted);font-size:.7rem}.timer-section,.tasks-section{margin-top:30px}.timer-card{display:flex;flex-direction:column;align-items:center;padding:24px}.timer-ring{--timer-progress:0deg;width:190px;height:190px;display:grid;place-items:center;border-radius:50%;background:conic-gradient(from -90deg,var(--cyan) var(--timer-progress),#293650 var(--timer-progress));transition:background .2s}.timer-face{width:166px;height:166px;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:5px;border:1px solid #2c3c58;border-radius:50%;background:#111a2c}.timer-face strong{font-size:2.7rem;letter-spacing:-.06em;font-variant-numeric:tabular-nums}.timer-face span{color:var(--muted);font-size:.71rem}.timer-message{min-height:21px;margin:17px 0 13px;color:#b7c5dc;text-align:center;font-size:.84rem}.timer-controls{display:flex;gap:10px}.primary-button,.secondary-button{min-height:44px;padding:10px 20px;border-radius:11px;font:inherit;font-size:.86rem;font-weight:750;cursor:pointer}.primary-button{border:0;background:var(--cyan);color:#081721}.secondary-button{border:1px solid #354562;background:transparent;color:var(--text)}.primary-button:hover{filter:brightness(1.08)}.secondary-button:hover{border-color:var(--cyan)}.timer-modes{display:flex;gap:8px;margin-top:18px}.mode-button{padding:8px 12px;border:1px solid transparent;border-radius:10px;background:transparent;color:var(--muted);font:inherit;font-size:.77rem;cursor:pointer}.mode-button.selected{border-color:#53e2dc55;background:#53e2dc12;color:var(--cyan)}.tasks-card{padding:19px 20px}.task-form{display:grid;grid-template-columns:1fr minmax(150px,.45fr) auto;gap:9px}.task-form input{min-width:0;min-height:44px;padding:10px 12px;border:1px solid #31415e;border-radius:10px;background:#111a2c;color:var(--text);font:inherit;font-size:.86rem}.task-form input:focus{outline:2px solid #53e2dc88;border-color:var(--cyan)}.task-form input::placeholder{color:#8292ae}.task-note{margin:10px 0 0;color:#8292ae;font-size:.73rem}.task-list{display:grid;gap:8px;margin:15px 0 0;padding:0;list-style:none}.task-item{display:flex;align-items:center;gap:10px;padding:11px 12px;border:1px solid #293852;border-radius:11px;background:#111a2c}.task-details{display:grid;flex:1;gap:3px;min-width:0}.task-details strong{overflow:hidden;text-overflow:ellipsis;white-space:nowrap;font-size:.87rem}.task-due{color:var(--muted);font-size:.72rem}.task-due.due-today{color:#ffc96b}.task-due.overdue{color:var(--red)}.task-done,.task-remove{min-height:35px;border:1px solid #354562;border-radius:9px;background:transparent;color:var(--text);font:inherit;font-size:.75rem;cursor:pointer}.task-done{padding:0 10px}.task-done:hover{border-color:var(--green);color:var(--green)}.task-remove{width:35px;font-size:1.15rem;color:var(--muted)}.task-remove:hover{border-color:var(--red);color:var(--red)}.task-empty{display:flex;align-items:center;gap:9px;margin-top:15px;padding:14px;border:1px dashed #354562;border-radius:11px;color:var(--muted)}.task-empty span{color:var(--cyan)}.task-empty p{margin:0;font-size:.81rem}.task-empty[hidden]{display:none}.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}.home-button:focus-visible,.task-form button:focus-visible,.task-done:focus-visible,.task-remove:focus-visible,.mode-button:focus-visible,.primary-button:focus-visible,.secondary-button:focus-visible{outline:3px solid #53e2dc88;outline-offset:2px}
@media(max-width:640px){.intro{align-items:flex-start}.streak{gap:8px;padding:9px 11px}.timer-section,.tasks-section{margin-top:25px}.timer-card{padding:20px 14px}.timer-ring{width:170px;height:170px}.timer-face{width:148px;height:148px}.timer-face strong{font-size:2.4rem}.timer-modes{gap:2px}.mode-button{padding:8px}.tasks-card{padding:15px 13px}.task-form{grid-template-columns:1fr auto}.task-form input[type=date]{grid-column:1}.task-form .add-task{grid-column:2;grid-row:1 / span 2}.task-item{gap:7px;padding:9px}.task-details strong{font-size:.8rem}}
@media(max-width:380px){.streak{padding:8px}.streak small{font-size:.64rem}.task-form{grid-template-columns:1fr}.task-form input[type=date],.task-form .add-task{grid-column:1;grid-row:auto}.task-form .add-task{width:100%}}

.preset-picker{display:flex;align-items:center;gap:9px;margin-top:13px;color:var(--muted);font-size:.75rem}.timer-presets{display:flex;gap:5px}.preset-button{min-width:38px;min-height:36px;padding:6px 9px;border:1px solid #354562;border-radius:9px;background:#111a2c;color:var(--text);font:inherit;font-weight:700;cursor:pointer}.preset-button:hover{border-color:var(--cyan)}.preset-button.selected{border-color:var(--cyan);background:#53e2dc1c;color:var(--cyan)}.preset-button:focus-visible{outline:3px solid #53e2dc88;outline-offset:2px}@media(max-width:380px){.preset-picker{gap:6px}.timer-presets{gap:3px}.preset-button{min-width:34px;padding:5px}}
.install-button{min-height:40px;padding:0 14px;border:1px solid #53e2dc70;border-radius:11px;background:#53e2dc17;color:var(--cyan);font:inherit;font-size:.8rem;font-weight:750;cursor:pointer;white-space:nowrap}.install-button:hover{background:#53e2dc2b}.install-button:disabled{color:var(--green);border-color:#77e7ac66;cursor:default}.install-dialog{width:min(420px,calc(100% - 32px));padding:0;border:1px solid var(--line);border-radius:20px;background:var(--panel);color:var(--text);box-shadow:0 20px 70px #0009}.install-dialog::backdrop{background:#050914bb;backdrop-filter:blur(4px)}.install-dialog-content{position:relative;padding:28px}.install-dialog-content h2{margin:8px 0;font-size:1.5rem}.install-dialog-content p:not(.eyebrow){color:var(--muted);font-size:.9rem;line-height:1.6}.install-dialog-content .primary-button{margin-top:10px}.dialog-close{position:absolute;top:14px;right:14px;width:36px;height:36px;border:1px solid var(--line);border-radius:10px;background:transparent;color:var(--text);font-size:1.25rem;cursor:pointer}.install-button:focus-visible,.dialog-close:focus-visible{outline:3px solid #53e2dc88;outline-offset:2px}
@media(max-width:640px){.topbar{gap:9px}.install-button{min-height:38px;padding:0 10px;font-size:.74rem}.today{max-width:130px;text-align:right;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}}

.subject-form{display:flex;gap:9px;margin-bottom:14px}.subject-form input,.task-form select,.task-status,.progress-filter select{min-width:0;min-height:42px;padding:9px 11px;border:1px solid #31415e;border-radius:10px;background:#111a2c;color:var(--text);font:inherit;font-size:.82rem}.subject-form input{flex:1}.subject-form input::placeholder{color:#8292ae}.task-form{grid-template-columns:minmax(160px,1fr) minmax(140px,.65fr) minmax(145px,.5fr) auto;align-items:center}.reminder-option{display:flex;align-items:center;gap:6px;color:var(--muted);font-size:.75rem;white-space:nowrap}.reminder-option input{min-height:auto;accent-color:var(--cyan)}.task-status{padding:6px 8px;font-size:.72rem}.progress-section{margin-top:32px}.progress-filter{display:flex;align-items:center;gap:8px;color:var(--muted);font-size:.75rem}.progress-filter select{min-height:36px;padding:6px 9px}.analytics-card{padding:20px}.progress-summary{display:grid;grid-template-columns:repeat(3,1fr);gap:10px}.summary-item{display:grid;gap:4px;padding:15px;border:1px solid var(--line);border-radius:13px;background:#111a2c}.summary-item strong{font-size:1.55rem}.summary-item span{color:var(--muted);font-size:.75rem}.summary-item.completed strong{color:var(--green)}.summary-item.pending strong{color:var(--cyan)}.summary-item.overdue strong{color:var(--red)}.chart-list{display:grid;gap:13px;margin-top:21px}.chart-row{display:grid;grid-template-columns:105px 1fr 24px;align-items:center;gap:10px;font-size:.77rem;color:var(--muted)}.chart-row b{color:var(--text);text-align:right}.chart-track{height:10px;overflow:hidden;border-radius:99px;background:#293650}.chart-track span{display:block;height:100%;border-radius:inherit;transition:width .25s}.priority-grid{display:grid;grid-template-columns:1fr 1.4fr;gap:20px;margin-top:24px;padding-top:19px;border-top:1px solid var(--line)}.priority-grid h3{margin:0 0 10px;font-size:.9rem}.priority-grid ol{display:grid;gap:7px;margin:0;padding-left:19px;color:var(--muted);font-size:.78rem}.task-form input:focus,.subject-form input:focus,.task-form select:focus,.task-status:focus,.progress-filter select:focus{outline:2px solid #53e2dc88;border-color:var(--cyan)}
@media(max-width:720px){.task-form{grid-template-columns:1fr 1fr}.task-form #taskName{grid-column:1/-1}.task-form .add-task{grid-column:2;grid-row:3}.reminder-option{grid-column:1;grid-row:3}.priority-grid{grid-template-columns:1fr}.progress-filter{flex-direction:column;align-items:flex-end}.subject-form .secondary-button{padding:8px 12px;font-size:.74rem}}
@media(max-width:420px){.task-form{grid-template-columns:1fr}.task-form #taskName,.task-form input[type=date],.task-form select,.reminder-option,.task-form .add-task{grid-column:1;grid-row:auto}.subject-form{flex-direction:column}.progress-summary{gap:6px}.summary-item{padding:11px}.summary-item strong{font-size:1.3rem}.summary-item span{font-size:.67rem}.chart-row{grid-template-columns:85px 1fr 20px;gap:7px}}
.today-section,.week-section,.backup-section{margin-top:28px}.today-card,.week-card,.backup-card{padding:17px 20px}.today-tasks{display:grid;gap:8px}.today-tasks p{margin:0;padding:10px 12px;border-left:3px solid var(--cyan);border-radius:5px;background:#111a2c;color:var(--text);font-size:.84rem}.week-calendar{display:grid;grid-template-columns:repeat(7,minmax(0,1fr));gap:8px}.week-day{min-height:126px;padding:10px;border:1px solid var(--line);border-radius:12px;background:#111a2c}.week-day.is-today{border-color:var(--cyan)}.week-day strong,.week-day small{display:block}.week-day strong{text-transform:capitalize;font-size:.78rem}.week-day>small{margin-top:3px;color:var(--muted);font-size:.7rem}.week-day ul{display:grid;gap:4px;margin:9px 0 0;padding-left:14px;font-size:.7rem}.week-empty{display:block;margin-top:14px;color:#8292ae;font-size:.7rem}.timer-task-picker{display:flex;align-items:center;gap:8px;margin-bottom:15px;color:var(--muted);font-size:.78rem}.timer-task-picker select{max-width:min(380px,70vw);min-height:38px;padding:7px 10px;border:1px solid var(--line);border-radius:9px;background:#111a2c;color:var(--text);font:inherit}.task-filters{display:flex;flex-wrap:wrap;gap:10px;margin-top:14px}.task-filters label{display:flex;align-items:center;gap:6px;color:var(--muted);font-size:.74rem}.task-filters input,.task-filters select{min-height:37px;max-width:220px;padding:7px 9px;border:1px solid var(--line);border-radius:9px;background:#111a2c;color:var(--text);font:inherit;font-size:.76rem}.task-edit{min-height:35px;padding:0 10px;border:1px solid #354562;border-radius:9px;background:transparent;color:var(--text);font:inherit;font-size:.75rem;cursor:pointer}.priority-high{border-color:#ffcb7377}.backup-card>div{display:flex;gap:9px;margin-top:13px}.import-label{display:inline-flex;align-items:center;cursor:pointer}.task-form [hidden]{display:none!important}
@media(max-width:760px){.week-calendar{grid-template-columns:repeat(4,minmax(0,1fr))}.week-day{min-height:110px}.task-filters{align-items:stretch}.task-filters label{flex:1;flex-direction:column;align-items:stretch}.task-filters input,.task-filters select{max-width:none}.task-form{grid-template-columns:1fr 1fr}.task-form #taskName{grid-column:1/-1}.task-form .add-task,.task-form #cancelEditTask{grid-column:2}}
@media(max-width:480px){.week-calendar{grid-template-columns:repeat(2,minmax(0,1fr))}.week-day{min-height:95px}.task-form{grid-template-columns:1fr}.task-form #taskName,.task-form input[type=date],.task-form select,.task-form .reminder-option,.task-form .add-task,.task-form #cancelEditTask{grid-column:1;grid-row:auto}.task-item{flex-wrap:wrap}.task-details{flex-basis:100%}.today-card,.week-card,.backup-card{padding:14px}.timer-task-picker{align-items:flex-start;flex-direction:column}.backup-card>div{flex-wrap:wrap}}
.quick-nav{display:flex;gap:7px;order:4}.quick-nav a{padding:7px 9px;border:1px solid var(--line);border-radius:9px;color:var(--muted);font-size:.72rem;text-decoration:none;white-space:nowrap}.quick-nav a:hover,.quick-nav a:focus-visible{border-color:var(--cyan);color:var(--cyan)}.subject-manager{display:flex;flex-wrap:wrap;gap:7px;margin:0 0 14px;padding:0;list-style:none}.subject-manager li{display:flex;align-items:center;gap:7px;padding:6px 7px 6px 10px;border:1px solid var(--line);border-radius:10px;background:#111a2c;font-size:.76rem}.subject-manager .task-edit,.subject-manager .task-remove{min-height:30px}
@media(max-width:760px){.quick-nav{order:5;width:100%;overflow-x:auto;padding-top:2px}.topbar{flex-wrap:wrap}.today{margin-left:auto}}