/* 🎀 SANRIO INSPIRED COLOR PALETTE & VARIABLES 🎀 */
:root {
    --kitty-white: #ffffff;
    --kitty-black: #1a1a1a;
    --kitty-red: #ff0033;
    --kitty-pink: #ff52a3;
    --kitty-light-pink: #ff99cc;
    --kitty-pastel: #ffe6f2;
    --kitty-bg: #fff0f5;
    --kitty-yellow: #ffcc00;
    --kitty-blue: #99ccff;

    --border-thick: 4px solid var(--kitty-black);
    --font-main: 'Nunito', sans-serif;
    --shadow-cute: 6px 6px 0px var(--kitty-pink);
    --shadow-dark: 5px 5px 0px var(--kitty-black);
    --shadow-hover: 8px 8px 0px var(--kitty-black);

    --primary: #e91e63;
    --primary-light: #f8bbd0;
    --background: #ffffff;
    --text: #212121;
    --accent: #fce4ec;
    --space-xs: 4px;
    --space-sm: 8px;
    --space-md: 16px;
    --space-lg: 24px;
    --space-xl: 32px;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

body {
    background-color: var(--kitty-bg);
    background-image: radial-gradient(var(--kitty-pink) 10%, transparent 10%);
    background-size: 30px 30px;
    color: var(--kitty-black);
    font-family: var(--font-main);
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
    padding-bottom: 90px;
    padding-top: 20px;
}

.container {
    max-width: 900px;
    margin: 0 auto;
    padding: 0 1rem;
}

/* 🎀 NAVIGATION 🎀 */
nav {
    background: var(--kitty-white);
    border: var(--border-thick);
    border-radius: 20px;
    padding: 10px;
    box-shadow: var(--shadow-dark);
    margin-bottom: 2rem;
    display: flex;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 10px;
    position: sticky;
    top: 10px;
    z-index: 1000;
}

.nav-btn {
    flex: 1;
    min-width: 80px;
    background: var(--kitty-pastel);
    color: var(--kitty-black);
    border: 3px solid var(--kitty-black);
    border-radius: 12px;
    padding: 8px 5px;
    font-family: var(--font-main);
    font-weight: 900;
    font-size: 0.9rem;
    cursor: pointer;
    text-align: center;
    transition: all 0.2s;
    box-shadow: 2px 2px 0px var(--kitty-black);
}

.nav-btn:hover {
    transform: translateY(-2px);
    box-shadow: 4px 4px 0px var(--kitty-black);
}

.nav-btn.active {
    background: var(--kitty-pink);
    color: var(--kitty-white);
    box-shadow: inset 2px 2px 0px rgba(0,0,0,0.2);
    transform: translateY(2px);
}

/* 🎀 PAGES 🎀 */
.page { display: none; animation: fadeIn 0.4s ease-in-out; }
.page.active { display: block; }

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to   { opacity: 1; transform: translateY(0); }
}

/* 🎀 HEADERS 🎀 */
header {
    text-align: center;
    margin-bottom: 2rem;
    background: var(--kitty-white);
    padding: 2rem 1rem;
    border-radius: 30px;
    border: var(--border-thick);
    box-shadow: var(--shadow-cute);
}

h1 {
    font-size: 2.5rem;
    font-weight: 900;
    color: var(--kitty-pink);
    text-shadow: 2px 2px 0px var(--kitty-black);
    margin-bottom: 0.5rem;
    line-height: 1.2;
}

h2 {
    font-size: 2rem;
    font-weight: 900;
    color: var(--kitty-white);
    text-shadow:
        -2px -2px 0 var(--kitty-black),
         2px -2px 0 var(--kitty-black),
        -2px  2px 0 var(--kitty-black),
         2px  2px 0 var(--kitty-black),
         4px  4px 0 var(--kitty-pink);
    margin-bottom: 1.5rem;
    text-align: center;
    letter-spacing: 1px;
}

.subtitle {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--kitty-black);
}

/* 🎀 HERO 🎀 */
.hero-section {
    text-align: center;
    padding: var(--space-xl) 0;
    margin-bottom: var(--space-xl);
    background-color: var(--accent);
    border-radius: 1rem;
    box-shadow: 0 4px 8px rgba(0,0,0,0.05);
}

.hero-cta {
    display: inline-block;
    padding: var(--space-sm) var(--space-md);
    background-color: var(--primary);
    color: #fff;
    border-radius: 9999px;
    text-decoration: none;
    font-weight: 600;
    transition: background-color 0.2s ease;
}

.hero-cta:hover {
    background-color: var(--primary-light);
    color: var(--text);
}

/* 🎀 CALLOUTS 🎀 */
.callout {
    background: var(--kitty-white);
    border: var(--border-thick);
    border-radius: 20px;
    padding: 1.5rem;
    box-shadow: var(--shadow-cute);
    margin-bottom: 2rem;
}

.callout h3 {
    font-size: 1.4rem;
    font-weight: 900;
    color: var(--kitty-red);
    margin-bottom: 1rem;
}

.callout ul { list-style: none; }

.callout li {
    margin-bottom: 0.8rem;
    font-weight: 700;
    padding-left: 1.8rem;
    position: relative;
}

.callout li::before {
    content: '🍓';
    position: absolute;
    left: 0;
    top: 2px;
    font-size: 1.1rem;
}

/* 🎀 EXERCISE GRIDS & CARDS 🎀 */
.exercise-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1.5rem;
    margin-bottom: 3rem;
}

.card {
    background: var(--kitty-white);
    border: var(--border-thick);
    border-radius: 25px;
    padding: 15px;
    box-shadow: var(--shadow-cute);
    display: flex;
    flex-direction: column;
    transition: transform 0.2s, box-shadow 0.2s;
}

.card:hover {
    transform: translateY(-5px) rotate(-1deg);
    box-shadow: var(--shadow-hover);
}

.card.full-width { grid-column: 1 / -1; }

/* 🎀 IMAGE CONTAINER 🎀 */
.image-container {
    width: 100%;
    height: 180px;
    border-radius: 15px;
    border: 3px solid var(--kitty-black);
    overflow: hidden;
    position: relative;
    margin-bottom: 1rem;
    background-color: var(--kitty-white);
}

.image-container::after {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0; bottom: 0;
    background: rgba(255, 82, 163, 0.15);
    pointer-events: none;
}

.image-container img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
    filter: contrast(1.1) brightness(1.05);
}

.card-title {
    font-size: 1.3rem;
    font-weight: 900;
    color: var(--kitty-black);
    margin-bottom: 0.25rem;
    line-height: 1.2;
}

.card-meta {
    font-size: 0.95rem;
    font-weight: 800;
    color: var(--kitty-pink);
    margin-bottom: 0.8rem;
}

.badges {
    display: flex;
    flex-wrap: wrap;
    gap: 5px;
    margin-bottom: 1rem;
}

.badge {
    display: inline-block;
    background: var(--kitty-yellow);
    color: var(--kitty-black);
    border: 2px solid var(--kitty-black);
    font-weight: 900;
    font-size: 0.75rem;
    padding: 3px 8px;
    border-radius: 10px;
    text-transform: uppercase;
}

.badge.wrist { background: var(--kitty-blue); }

.cue {
    background: var(--kitty-bg);
    border: 2px dashed var(--kitty-light-pink);
    border-radius: 10px;
    padding: 10px;
    font-size: 0.9rem;
    font-weight: 700;
    font-style: italic;
    margin-top: auto;
    margin-bottom: 1rem;
}

/* 🎀 HEART CHECKBOXES 🎀 */
.sets-tracker {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    justify-content: center;
    border-top: 3px dashed var(--kitty-pastel);
    padding-top: 1rem;
}

.set-checkbox {
    position: relative;
    cursor: pointer;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.set-checkbox input {
    position: absolute;
    opacity: 0;
    height: 0;
    width: 0;
}

.heart-indicator {
    font-size: 2rem;
    line-height: 1;
    transition: transform 0.2s;
    text-shadow: 2px 2px 0px rgba(0,0,0,0.1);
}

.heart-indicator::after { content: '🤍'; }

.set-checkbox input:checked ~ .heart-indicator {
    animation: pop 0.3s ease-out forwards;
}

.set-checkbox input:checked ~ .heart-indicator::after { content: '💖'; }

.set-number {
    font-size: 0.8rem;
    font-weight: 900;
    color: var(--kitty-black);
    margin-top: -5px;
}

@keyframes pop {
    0%   { transform: scale(1); }
    50%  { transform: scale(1.3); }
    100% { transform: scale(1); }
}

/* 🎀 RESET BUTTON 🎀 */
.btn-reset {
    display: block;
    width: 100%;
    background: var(--kitty-black);
    color: var(--kitty-white);
    border: var(--border-thick);
    border-radius: 20px;
    font-family: var(--font-main);
    font-weight: 900;
    font-size: 1.2rem;
    padding: 15px;
    margin-top: 2rem;
    box-shadow: 4px 4px 0px var(--kitty-red);
    cursor: pointer;
    text-transform: uppercase;
    transition: all 0.1s;
}

.btn-reset:active {
    transform: translate(4px, 4px);
    box-shadow: 0px 0px 0px var(--kitty-red);
}

/* 🎀 PROFILE CARD 🎀 */
.profile-card {
    background: var(--kitty-white);
    border: var(--border-thick);
    border-radius: 25px;
    padding: 1.5rem;
    box-shadow: 6px 6px 0px var(--kitty-blue);
    margin-top: 2rem;
}

.profile-card h3 {
    font-size: 1.5rem;
    font-weight: 900;
    color: var(--kitty-pink);
    text-align: center;
    margin-bottom: 1.2rem;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 6px;
    margin-bottom: 1rem;
}

.form-group label {
    font-weight: 900;
    font-size: 0.95rem;
    color: var(--kitty-black);
}

.form-group input {
    padding: 10px 14px;
    border: 3px solid var(--kitty-black);
    border-radius: 12px;
    font-family: var(--font-main);
    font-size: 1rem;
    font-weight: 700;
    background: var(--kitty-bg);
    color: var(--kitty-black);
    outline: none;
    transition: border-color 0.2s, box-shadow 0.2s;
}

.form-group input:focus {
    border-color: var(--kitty-pink);
    box-shadow: 3px 3px 0px var(--kitty-pink);
}

.btn-save {
    display: block;
    width: 100%;
    background: var(--kitty-pink);
    color: var(--kitty-white);
    border: var(--border-thick);
    border-radius: 16px;
    font-family: var(--font-main);
    font-weight: 900;
    font-size: 1.1rem;
    padding: 12px;
    margin-top: 0.5rem;
    box-shadow: 4px 4px 0px var(--kitty-black);
    cursor: pointer;
    text-transform: uppercase;
    transition: all 0.1s;
}

.btn-save:active {
    transform: translate(4px, 4px);
    box-shadow: 0px 0px 0px var(--kitty-black);
}

.profile-display {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.profile-greeting {
    text-align: center;
    font-size: 1.3rem;
    font-weight: 900;
    color: var(--kitty-pink);
    background: var(--kitty-bg);
    border: 3px dashed var(--kitty-light-pink);
    border-radius: 16px;
    padding: 14px;
}

.btn-edit-profile {
    align-self: flex-end;
    background: var(--kitty-yellow);
    color: var(--kitty-black);
    border: 3px solid var(--kitty-black);
    border-radius: 12px;
    font-family: var(--font-main);
    font-weight: 900;
    font-size: 0.9rem;
    padding: 6px 14px;
    cursor: pointer;
    box-shadow: 2px 2px 0px var(--kitty-black);
    transition: all 0.1s;
}

.btn-edit-profile:active {
    transform: translate(2px, 2px);
    box-shadow: none;
}

/* 🎀 4-WEEK SCHEDULE 🎀 */
.week-schedule {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.week-row {
    display: flex;
    align-items: center;
    gap: 12px;
    background: var(--kitty-bg);
    border: 3px solid var(--kitty-black);
    border-radius: 14px;
    padding: 10px 14px;
    transition: transform 0.15s;
}

.week-row:hover { transform: translateX(4px); }

.week-row.current-week {
    background: var(--kitty-pastel);
    border-color: var(--kitty-pink);
    box-shadow: 3px 3px 0px var(--kitty-pink);
}

.week-row.deload-week {
    background: #fff8e1;
    border-color: var(--kitty-yellow);
    box-shadow: 3px 3px 0px var(--kitty-yellow);
}

.week-badge {
    background: var(--kitty-pink);
    color: var(--kitty-white);
    border: 2px solid var(--kitty-black);
    border-radius: 10px;
    font-weight: 900;
    font-size: 0.8rem;
    padding: 4px 10px;
    white-space: nowrap;
    text-transform: uppercase;
    flex-shrink: 0;
}

.week-row.deload-week .week-badge {
    background: var(--kitty-yellow);
    color: var(--kitty-black);
}

.week-dates {
    font-size: 0.9rem;
    font-weight: 800;
    color: var(--kitty-black);
    flex: 1;
}

.week-label {
    font-size: 0.8rem;
    font-weight: 700;
    color: var(--kitty-pink);
}

.week-row.deload-week .week-label { color: #b8860b; }

/* 🎀 REST TIMER 🎀 */
.rest-btn {
    display: inline-block;
    margin-left: 0.25rem;
    padding: 0.2rem 0.5rem;
    font-size: 0.75rem;
    line-height: 1;
    border: 1px solid var(--kitty-pink);
    border-radius: 1rem;
    background-color: var(--kitty-light-pink);
    color: var(--kitty-pink);
    cursor: pointer;
    transition: background-color 0.2s, color 0.2s;
}

.rest-btn:hover:not(:disabled) {
    background-color: var(--kitty-pink);
    color: #fff;
}

.rest-btn:disabled { opacity: 0.6; cursor: default; }

.rest-btn.active-timer {
    background-color: var(--kitty-red);
    color: #fff;
}

/* 🎀 SLIDER 🎀 */
.slider-container {
    position: relative;
    width: 100%;
    height: 100%;
    overflow: hidden;
}

.slider-container .slide {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: none;
}

.slider-container .slide.active { display: block; }

.slider-container .prev,
.slider-container .next {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    z-index: 10;
    padding: 0.25rem 0.5rem;
    background-color: rgba(255,255,255,0.8);
    border: none;
    border-radius: 0.5rem;
    font-size: 1.25rem;
    line-height: 1;
    color: var(--text);
    cursor: pointer;
}

.slider-container .prev { left: 4px; }
.slider-container .next { right: 4px; }

/* 🎀 CALENDAR 🎀 */
.calendar-section {
    background: var(--kitty-white);
    border: var(--border-thick);
    border-radius: 25px;
    padding: 1.5rem;
    box-shadow: 6px 6px 0px var(--kitty-light-pink);
    margin-top: 2rem;
}

.calendar-section h3 {
    font-size: 1.5rem;
    font-weight: 900;
    color: var(--kitty-pink);
    text-align: center;
    margin-bottom: 1rem;
}

.calendar-streak {
    text-align: center;
    font-size: 1rem;
    font-weight: 900;
    color: var(--kitty-red);
    background: #fff8e1;
    border: 2px dashed var(--kitty-yellow);
    border-radius: 12px;
    padding: 8px 12px;
    margin-bottom: 0.75rem;
}

.calendar-grid {
    display: grid;
    grid-template-columns: repeat(7, 1fr);
    gap: 6px;
}

.calendar-day {
    min-height: 50px;
    background: var(--kitty-bg);
    border-radius: 10px;
    border: 2px solid var(--kitty-pastel);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 6px 4px;
    cursor: pointer;
    transition: all 0.2s;
}

.calendar-day:hover {
    transform: scale(1.05);
    border-color: var(--kitty-pink);
    box-shadow: 0 2px 8px rgba(255, 105, 180, 0.3);
}

.calendar-day.has-workouts {
    background: #ffe8f3;
    border-color: var(--kitty-light-pink);
}

.day-number {
    font-size: 0.9rem;
    font-weight: 900;
    color: var(--kitty-black);
    margin-bottom: 2px;
}

.workout-dots {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 2px;
    font-size: 0.65rem;
}

/* 🎀 CALENDAR MODAL 🎀 */
.calendar-modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    z-index: 9999;
    align-items: center;
    justify-content: center;
    padding: 1rem;
}

.calendar-modal.visible {
    display: flex;
}

.calendar-modal-content {
    background: var(--kitty-white);
    border: var(--border-thick);
    border-radius: 20px;
    width: 100%;
    max-width: 500px;
    max-height: 80vh;
    overflow-y: auto;
    padding: 1.5rem;
    box-shadow: var(--shadow-dark);
}

.calendar-modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
    padding-bottom: 1rem;
    border-bottom: 3px dashed var(--kitty-pastel);
}

.calendar-modal-title {
    font-size: 1.3rem;
    font-weight: 900;
    color: var(--kitty-pink);
}

.calendar-modal-close {
    background: var(--kitty-pastel);
    border: 2px solid var(--kitty-black);
    border-radius: 50%;
    width: 32px;
    height: 32px;
    font-size: 1.2rem;
    font-weight: 900;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s;
}

.calendar-modal-close:hover {
    background: var(--kitty-pink);
    color: var(--kitty-white);
}

.calendar-modal-body {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.workout-entry {
    padding: 0.75rem;
    background: var(--kitty-bg);
    border: 2px solid var(--kitty-pastel);
    border-radius: 12px;
    font-weight: 700;
}

.workout-entry-type {
    font-size: 1rem;
    color: var(--kitty-pink);
    margin-bottom: 0.25rem;
}

.workout-entry-time {
    font-size: 0.8rem;
    color: var(--kitty-black);
    opacity: 0.7;
}

.calendar-modal-empty {
    text-align: center;
    color: var(--kitty-pink);
    font-weight: 700;
    padding: 2rem;
}

/* 🎀 TOAST NOTIFICATIONS 🎀 */
.toast {
    position: fixed;
    bottom: 100px;
    left: 50%;
    transform: translateX(-50%) translateY(20px);
    background: var(--kitty-pink);
    color: var(--kitty-white);
    font-weight: 900;
    font-size: 0.95rem;
    padding: 12px 20px;
    border: 3px solid var(--kitty-black);
    border-radius: 16px;
    box-shadow: 4px 4px 0px var(--kitty-black);
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.3s, transform 0.3s;
    z-index: 9999;
    max-width: 85%;
    text-align: center;
}

.toast.visible {
    opacity: 1;
    transform: translateX(-50%) translateY(0);
}

/* ═══════════════════════════════════════════════════════════════
   CUSTOM WORKOUTS — Sprint 3B
   ═══════════════════════════════════════════════════════════════ */

/* Customize button */
.btn-customize {
  display: block;
  width: 100%;
  max-width: 300px;
  margin: 0 auto 2rem;
  padding: 1rem 1.5rem;
  background: linear-gradient(135deg, #ff69b4 0%, #ff1493 100%);
  color: white;
  border: none;
  border-radius: 12px;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  transition: transform 0.2s, box-shadow 0.2s;
  box-shadow: 0 4px 12px rgba(255, 105, 180, 0.3);
}

.btn-customize:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 16px rgba(255, 105, 180, 0.4);
}

.btn-customize:active {
  transform: translateY(0);
}

/* Custom workouts section */
.custom-workouts-section {
  margin: 3rem 0;
  padding-top: 2rem;
  border-top: 2px dashed #ffb6d9;
}

.custom-section-title {
  text-align: center;
  color: #ff69b4;
  margin-bottom: 1.5rem;
  font-size: 1.5rem;
}

/* Remove button on custom cards */
.btn-remove-custom {
  width: 100%;
  padding: 0.5rem;
  margin-top: 0.5rem;
  background: #ffe4f0;
  color: #ff1493;
  border: 1px solid #ffb6d9;
  border-radius: 8px;
  font-size: 0.875rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s;
}

.btn-remove-custom:hover {
  background: #ffd4e8;
  border-color: #ff69b4;
}

/* Library modal */
.library-modal {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.5);
  z-index: 9999;
  align-items: center;
  justify-content: center;
  padding: 1rem;
}

.library-modal.visible {
  display: flex;
}

.library-modal-content {
  background: white;
  border-radius: 16px;
  width: 100%;
  max-width: 800px;
  max-height: 90vh;
  display: flex;
  flex-direction: column;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
}

.library-modal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1.5rem;
  border-bottom: 2px solid #ffe4f0;
}

.library-modal-header h3 {
  margin: 0;
  color: #ff1493;
  font-size: 1.5rem;
}

.library-modal-close {
  background: none;
  border: none;
  font-size: 1.5rem;
  color: #999;
  cursor: pointer;
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  transition: all 0.2s;
}

.library-modal-close:hover {
  background: #ffe4f0;
  color: #ff1493;
}

.library-modal-body {
  padding: 1.5rem;
  overflow-y: auto;
  flex: 1;
}

/* Library cards */
.library-card {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 1rem;
  margin-bottom: 1rem;
  background: #fff;
  border: 2px solid #ffe4f0;
  border-radius: 12px;
  transition: all 0.2s;
}

.library-card:hover {
  border-color: #ffb6d9;
  box-shadow: 0 4px 12px rgba(255, 105, 180, 0.1);
}

.library-card img {
  width: 80px;
  height: 80px;
  object-fit: cover;
  border-radius: 8px;
  flex-shrink: 0;
}

.library-card-info {
  flex: 1;
}

.library-card-title {
  font-weight: 600;
  color: #333;
  margin-bottom: 0.25rem;
}

.library-card-meta {
  font-size: 0.875rem;
  color: #999;
}

.library-card-add {
  padding: 0.5rem 1.5rem;
  background: #ff69b4;
  color: white;
  border: none;
  border-radius: 8px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s;
  flex-shrink: 0;
}

.library-card-add:hover {
  background: #ff1493;
  transform: scale(1.05);
}

.library-card-add:active {
  transform: scale(0.95);
}

/* Mobile responsive */
@media (max-width: 768px) {
  .library-card {
    flex-direction: column;
    text-align: center;
  }
  
  .library-card img {
    width: 100%;
    height: auto;
    max-width: 200px;
  }
  
  .library-card-add {
    width: 100%;
  }
}

/* 🎀 MOBILE 🎀 */
@media (max-width: 600px) {
    nav {
        position: fixed;
        bottom: 0;
        top: auto;
        left: 0;
        right: 0;
        border-radius: 20px 20px 0 0;
        margin-bottom: 0;
        padding: 15px 10px;
    }

    .nav-btn { font-size: 0.8rem; padding: 10px 2px; }
    h1 { font-size: 2rem; }
    h2 { font-size: 1.8rem; }
    
    .calendar-grid {
        gap: 4px;
    }
    
    .calendar-day {
        min-height: 45px;
        padding: 4px 2px;
    }
    
    .day-number {
        font-size: 0.8rem;
    }
    
    .workout-dots {
        font-size: 0.55rem;
    }
}
/* ═══════════════════════════════════════════════════════════════
   MODERN THEME — 2026 Fitness App Style
   ═══════════════════════════════════════════════════════════════ */

body.modern-theme {
    background: linear-gradient(135deg, #fef5f8 0%, #fff0f5 50%, #ffe4f0 100%);
    background-image: none;
    font-family: -apple-system, BlinkMacSystemFont, 'SF Pro Display', 'Segoe UI', 'Roboto', sans-serif;
}

/* Modern Navigation */
body.modern-theme nav {
    background: rgba(255, 255, 255, 0.7);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid rgba(255, 182, 217, 0.3);
    border-radius: 16px;
    box-shadow: 0 8px 32px rgba(233, 30, 99, 0.1);
}

body.modern-theme .nav-btn {
    background: transparent;
    border: none;
    border-radius: 12px;
    font-weight: 600;
    font-size: 0.875rem;
    box-shadow: none;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

body.modern-theme .nav-btn:hover {
    background: rgba(255, 105, 180, 0.1);
    transform: translateY(-1px);
    box-shadow: none;
}

body.modern-theme .nav-btn.active {
    background: linear-gradient(135deg, #ff69b4 0%, #e91e63 100%);
    color: white;
    box-shadow: 0 4px 12px rgba(233, 30, 99, 0.3);
    transform: translateY(0);
}

/* Modern Headers */
body.modern-theme header {
    background: rgba(255, 255, 255, 0.8);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 182, 217, 0.2);
    border-radius: 24px;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.05);
}

body.modern-theme h1 {
    background: linear-gradient(135deg, #ff69b4 0%, #e91e63 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    text-shadow: none;
}

body.modern-theme h2 {
    color: #1a1a1a;
    text-shadow: none;
    font-weight: 700;
}

/* Modern Cards */
body.modern-theme .card {
    background: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 182, 217, 0.2);
    border-radius: 20px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

body.modern-theme .card:hover {
    transform: translateY(-8px);
    box-shadow: 0 12px 40px rgba(233, 30, 99, 0.15);
}

body.modern-theme .image-container {
    border: none;
    border-radius: 16px;
    overflow: hidden;
}

body.modern-theme .image-container::after {
    display: none;
}

body.modern-theme .card-title {
    font-size: 1.25rem;
    font-weight: 600;
    background: linear-gradient(135deg, #1a1a1a 0%, #333 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

body.modern-theme .card-meta {
    color: #666;
    font-weight: 500;
}

body.modern-theme .badge {
    background: linear-gradient(135deg, #ffe4f0 0%, #ffd4e8 100%);
    color: #e91e63;
    border: 1px solid rgba(233, 30, 99, 0.2);
    border-radius: 8px;
    font-weight: 600;
    text-transform: none;
}

body.modern-theme .badge.wrist {
    background: linear-gradient(135deg, #e3f2fd 0%, #bbdefb 100%);
    color: #1976d2;
    border-color: rgba(25, 118, 210, 0.2);
}

/* Modern Callouts */
body.modern-theme .callout {
    background: rgba(255, 255, 255, 0.8);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 182, 217, 0.2);
    border-radius: 20px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.05);
}

body.modern-theme .callout h3 {
    background: linear-gradient(135deg, #ff69b4 0%, #e91e63 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

/* Modern Profile Card */
body.modern-theme .profile-card {
    background: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 182, 217, 0.2);
    border-radius: 24px;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.08);
}

body.modern-theme .form-group input {
    background: rgba(255, 255, 255, 0.9);
    border: 1px solid rgba(255, 182, 217, 0.3);
    border-radius: 12px;
    font-weight: 500;
}

body.modern-theme .form-group input:focus {
    border-color: #ff69b4;
    box-shadow: 0 0 0 3px rgba(255, 105, 180, 0.1);
}

body.modern-theme .btn-save {
    background: linear-gradient(135deg, #ff69b4 0%, #e91e63 100%);
    border: none;
    border-radius: 12px;
    box-shadow: 0 4px 12px rgba(233, 30, 99, 0.3);
}

body.modern-theme .btn-save:active {
    transform: scale(0.98);
    box-shadow: 0 2px 8px rgba(233, 30, 99, 0.3);
}

/* Modern Calendar */
body.modern-theme .calendar-section {
    background: rgba(255, 255, 255, 0.8);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 182, 217, 0.2);
    border-radius: 24px;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.05);
}

body.modern-theme .calendar-day {
    background: rgba(255, 255, 255, 0.6);
    border: 1px solid rgba(255, 182, 217, 0.2);
    border-radius: 12px;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

body.modern-theme .calendar-day:hover {
    background: rgba(255, 255, 255, 0.9);
    border-color: #ff69b4;
    transform: scale(1.05);
    box-shadow: 0 4px 12px rgba(233, 30, 99, 0.2);
}

body.modern-theme .calendar-day.has-workouts {
    background: linear-gradient(135deg, #ffe4f0 0%, #ffd4e8 100%);
    border-color: rgba(233, 30, 99, 0.3);
}

/* Modern Buttons */
body.modern-theme .btn-reset {
    background: linear-gradient(135deg, #1a1a1a 0%, #333 100%);
    border: none;
    border-radius: 16px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
}

body.modern-theme .btn-customize {
    background: linear-gradient(135deg, #ff69b4 0%, #e91e63 100%);
    border: none;
    box-shadow: 0 4px 12px rgba(233, 30, 99, 0.3);
}

/* Theme Toggle Button */
.theme-toggle {
    background: linear-gradient(135deg, #ffd700 0%, #ffed4e 100%);
    border: 3px solid var(--kitty-black);
    border-radius: 50%;
    width: 48px;
    height: 48px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    flex-shrink: 0;
    box-shadow: 2px 2px 0px var(--kitty-black);
}

.theme-toggle:hover {
    transform: rotate(180deg) scale(1.1);
    box-shadow: 4px 4px 0px var(--kitty-black);
}

.theme-toggle:active {
    transform: rotate(180deg) scale(0.95);
}

.theme-icon {
    font-size: 1.5rem;
    line-height: 1;
}

body.modern-theme .theme-toggle {
    background: linear-gradient(135deg, #ff69b4 0%, #e91e63 100%);
    border: none;
    box-shadow: 0 4px 12px rgba(233, 30, 99, 0.3);
}

body.modern-theme .theme-toggle:hover {
    box-shadow: 0 8px 20px rgba(233, 30, 99, 0.4);
}

/* Modern Toast */
body.modern-theme .toast {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    color: #e91e63;
    border: 1px solid rgba(233, 30, 99, 0.2);
    border-radius: 16px;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.15);
}

/* Modern Heart Checkboxes */
body.modern-theme .sets-tracker {
    border-top: 2px solid rgba(255, 182, 217, 0.3);
}

body.modern-theme .heart-indicator {
    filter: drop-shadow(0 2px 4px rgba(233, 30, 99, 0.2));
}

/* Modern Week Schedule */
body.modern-theme .week-row {
    background: rgba(255, 255, 255, 0.6);
    border: 1px solid rgba(255, 182, 217, 0.2);
    border-radius: 16px;
    transition: all 0.3s;
}

body.modern-theme .week-row:hover {
    background: rgba(255, 255, 255, 0.9);
    transform: translateX(8px);
}

body.modern-theme .week-row.current-week {
    background: linear-gradient(135deg, #ffe4f0 0%, #ffd4e8 100%);
    border-color: #ff69b4;
    box-shadow: 0 4px 12px rgba(233, 30, 99, 0.2);
}

body.modern-theme .week-badge {
    background: linear-gradient(135deg, #ff69b4 0%, #e91e63 100%);
    border: none;
    box-shadow: 0 2px 8px rgba(233, 30, 99, 0.3);
}

@media (max-width: 600px) {
    body.modern-theme nav {
        border-radius: 20px 20px 0 0;
    }
}