@import url('https://fonts.googleapis.com/css2?family=Cormorant+Garamond:ital,wght@0,400;0,500;0,600;1,400;1,500&family=Jost:wght@300;400;500;600&display=swap');

:root{
  --tan:#C4956A; --blush:#E8D9CC; --cream:#F5EDE0; --linen:#EFEFEA;
  --rose:#D4B8AE; --sage:#8E9B7A; --sage-lt:#B5BEA4; --sage-pale:#D6DDCF;
  --bg:#FAF7F2; --bg2:#F5EDE0; --bg3:#EFEFEA; --card:#FFFFFF;
  --border:#E8D9CC; --border2:#D4B8AE;
  --text:#3C2F24; --text2:#7A6558; --text3:#A8958A;
  --red:#B85C4A; --red-lt:#F5E6E3; --green:#5C7A52; --green-lt:#E3EDE0;
  --gold:#B08040; --gold-lt:#F0E8D5;
  --r:14px; --r-sm:8px; --r-lg:20px;
  --font:'Jost',sans-serif; --serif:'Cormorant Garamond',serif;
  --shadow:0 2px 12px rgba(60,47,36,.07); --shadow-lg:0 8px 32px rgba(60,47,36,.12);
}

*{box-sizing:border-box;margin:0;padding:0;-webkit-tap-highlight-color:transparent}
html,body{height:100%;background:var(--bg);color:var(--text);font-family:var(--font);font-size:15px;overflow:hidden}

/* ══ SHELL ══ */
.app{display:flex;flex-direction:column;height:100vh;width:100%}
.header{background:var(--bg2);border-bottom:1px solid var(--border);flex-shrink:0;padding:0 20px;padding-top:max(env(safe-area-inset-top),12px)}
.header-inner{display:flex;align-items:center;justify-content:space-between;padding:10px 0 12px;gap:12px;flex-wrap:nowrap}
.logo{font-family:var(--serif);font-size:26px;font-weight:500;letter-spacing:.2px;white-space:nowrap;flex-shrink:0;line-height:1}
.logo span{color:var(--tan);font-style:italic;font-weight:400}
.header-actions{display:flex;gap:8px;flex-shrink:0;align-items:center}
.app-body{display:flex;flex:1;min-height:0;overflow:hidden}
.main{flex:1;overflow-y:auto;-webkit-overflow-scrolling:touch;background:var(--bg);min-height:0}
.stats-row{display:grid;gap:10px;margin:14px 0}

/* ══ PHONE (< 600px): nav at top ══ */
@media(max-width:599px){
  .app-body{flex-direction:column}
  .bottom-nav{
    order:-1;background:var(--card);border-bottom:1px solid var(--border);
    display:flex;flex-direction:row;flex-shrink:0;
    overflow-x:auto;padding:0;gap:0;-webkit-overflow-scrolling:touch;scrollbar-width:none;
  }
  .bottom-nav::-webkit-scrollbar{display:none}
  .nav-item{
    flex:1;min-width:60px;display:flex;flex-direction:column;align-items:center;gap:3px;
    padding:8px 4px;border:none;background:none;color:var(--text3);font-family:var(--font);
    font-size:9px;font-weight:500;letter-spacing:.4px;text-transform:uppercase;
    transition:color .15s;cursor:pointer;white-space:nowrap;
  }
  .nav-item.active{color:var(--tan);border-bottom:2px solid var(--tan)}
  .nav-icon{font-size:18px;line-height:1.2}
  .main{padding:0 12px 16px}
  .stats-row{grid-template-columns:1fr 1fr}
}

/* ══ TABLET (600–1023px): bottom tab bar ══ */
@media(min-width:600px) and (max-width:1023px){
  .app-body{flex-direction:column}
  .bottom-nav{
    order:1;background:var(--card);border-top:1px solid var(--border);
    display:flex;flex-direction:row;flex-shrink:0;
    padding:8px 0 max(env(safe-area-inset-bottom),8px);
  }
  .nav-item{
    flex:1;display:flex;flex-direction:column;align-items:center;gap:3px;
    padding:4px 0;border:none;background:none;color:var(--text3);font-family:var(--font);
    font-size:10px;font-weight:500;letter-spacing:.5px;text-transform:uppercase;
    transition:color .15s;cursor:pointer;
  }
  .nav-item.active{color:var(--tan)}
  .nav-icon{font-size:20px;line-height:1}
  .main{padding:0 20px 20px}
  .stats-row{grid-template-columns:repeat(4,1fr)}
}

/* ══ DESKTOP (1024px+): left sidebar ══ */
@media(min-width:1024px){
  .app-body{flex-direction:row}
  .bottom-nav{
    width:220px;flex-shrink:0;background:var(--card);
    border-right:1px solid var(--border);border-top:none;
    display:flex;flex-direction:column;align-items:stretch;
    justify-content:flex-start;gap:2px;padding:20px 0;overflow-y:auto;
  }
  .nav-item{
    flex:none;display:flex;flex-direction:row;align-items:center;
    justify-content:flex-start;gap:12px;padding:11px 20px;margin:0 10px;
    border:none;border-radius:10px;background:none;color:var(--text3);
    font-family:var(--font);font-size:13px;font-weight:500;letter-spacing:.2px;
    text-transform:none;transition:all .15s;cursor:pointer;width:auto;
  }
  .nav-item.active{background:var(--cream);color:var(--tan)}
  .nav-item:hover:not(.active){background:var(--bg3);color:var(--text)}
  .nav-icon{font-size:17px;flex-shrink:0}
  .main{padding:28px 40px 40px;max-width:960px}
  .stats-row{grid-template-columns:repeat(4,1fr)}
  .video-grid{display:grid;grid-template-columns:1fr 1fr;gap:14px}
  .video-grid .video-card{margin-bottom:0}
  .groups-grid{display:grid;grid-template-columns:1fr 1fr;gap:14px}
  .groups-grid .group-card{margin-bottom:0}
}

/* ══ MODALS: centered on tablet/desktop ══ */
@media(min-width:600px){
  .modal-overlay{align-items:center !important}
  .modal{border-radius:20px !important;max-width:540px;width:90%;margin:0 auto;max-height:85vh}
  .modal-handle{display:none}
}

/* ══ COMPONENTS ══ */
.section-title{font-size:10px;font-weight:600;letter-spacing:1.5px;text-transform:uppercase;color:var(--text3);margin-bottom:10px}
.stat-card{background:var(--card);border:1px solid var(--border);border-radius:var(--r);padding:16px;box-shadow:var(--shadow)}
.stat-val{font-family:var(--serif);font-size:26px;font-weight:500;margin-bottom:2px}
.stat-label{font-size:11px;color:var(--text3);font-weight:500;letter-spacing:.5px;text-transform:uppercase}
.v-tan{color:var(--tan)} .v-green{color:var(--green)} .v-red{color:var(--red)} .v-sage{color:var(--sage)}
.card{background:var(--card);border:1px solid var(--border);border-radius:var(--r);box-shadow:var(--shadow);overflow:hidden}
.card+.card{margin-top:10px}
.student-row{display:flex;align-items:center;gap:12px;padding:14px 16px;border-bottom:1px solid var(--border);cursor:pointer;transition:background .15s}
.student-row:last-child{border-bottom:none}
.student-row:active{background:var(--bg3)}
.avatar{width:40px;height:40px;border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:13px;font-weight:600;flex-shrink:0;font-family:var(--font)}
.av-tan{background:#F0DDD0;color:#8B5E3C} .av-sage{background:#D6DDCF;color:#4A5E3C}
.av-rose{background:#EDD9D3;color:#7A4A40} .av-gold{background:#F0E0C0;color:#7A5A20}
.av-slate{background:#D8DBE8;color:#3A4A6A}
.s-info{flex:1;min-width:0}
.s-name{font-weight:500;font-size:15px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.s-meta{font-size:12px;color:var(--text3);margin-top:2px}
.s-fee{text-align:right;flex-shrink:0}
.fee-due{font-family:var(--serif);font-size:18px;font-weight:500;color:var(--red)}
.fee-ok{font-family:var(--serif);font-size:16px;color:var(--green);font-weight:500}
.fee-lbl{font-size:10px;color:var(--text3);letter-spacing:.3px}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:6px;padding:10px 18px;border:none;border-radius:var(--r-sm);cursor:pointer;font-family:var(--font);font-size:13px;font-weight:500;transition:all .15s;white-space:nowrap}
.btn-primary{background:var(--tan);color:#fff} .btn-primary:active{background:#B08050}
.btn-sage{background:var(--sage);color:#fff} .btn-sage:active{background:#6A7A5A}
.btn-ghost{background:transparent;color:var(--text2);border:1px solid var(--border2)}
.btn-ghost:active{background:var(--bg3)}
.btn-danger{background:var(--red-lt);color:var(--red);border:1px solid #E8C5BF}
.btn-sm{padding:7px 12px;font-size:12px}
.btn-icon{padding:7px;width:32px;height:32px;border-radius:50%}
.btn-full{width:100%}
.form-field{margin-bottom:14px}
.form-row{display:grid;grid-template-columns:1fr 1fr;gap:12px}
label{font-size:11px;font-weight:600;letter-spacing:.8px;text-transform:uppercase;color:var(--text3);display:block;margin-bottom:6px}
input,select,textarea{background:var(--bg3);border:1.5px solid var(--border);color:var(--text);border-radius:var(--r-sm);padding:11px 13px;font-family:var(--font);font-size:15px;width:100%;outline:none;transition:border .15s;-webkit-appearance:none;appearance:none}
input:focus,select:focus,textarea:focus{border-color:var(--tan);background:#fff}
input::placeholder,textarea::placeholder{color:var(--text3)}
select{background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath d='M1 1l5 5 5-5' stroke='%23A8958A' stroke-width='1.5' fill='none' stroke-linecap='round'/%3E%3C/svg%3E");background-repeat:no-repeat;background-position:right 12px center;padding-right:34px}
textarea{resize:none;min-height:72px}
.badge{display:inline-flex;align-items:center;padding:3px 10px;border-radius:20px;font-size:11px;font-weight:600;letter-spacing:.3px}
.badge-red{background:var(--red-lt);color:var(--red)} .badge-green{background:var(--green-lt);color:var(--green)}
.badge-sage{background:var(--sage-pale);color:#4A5E3C} .badge-tan{background:#F0DDD0;color:#7A5030}
.badge-blue{background:#E0EEFB;color:#2A6496}
.group-card{background:var(--card);border:1px solid var(--border);border-radius:var(--r);box-shadow:var(--shadow);overflow:hidden;margin-bottom:12px;cursor:pointer}
.group-header{padding:16px;display:flex;align-items:center;gap:14px}
.group-icon{width:46px;height:46px;border-radius:12px;display:flex;align-items:center;justify-content:center;font-size:20px;flex-shrink:0}
.gi-tan{background:#F0DDD0} .gi-sage{background:#D6DDCF} .gi-rose{background:#EDD9D3}
.gi-gold{background:#F0E0C0} .gi-slate{background:#D8DBE8}
.group-info{flex:1;min-width:0}
.group-name{font-weight:600;font-size:15px}
.group-meta{font-size:12px;color:var(--text3);margin-top:3px}
.group-stats{display:flex;border-top:1px solid var(--border)}
.gstat{flex:1;padding:10px 12px;text-align:center;border-right:1px solid var(--border)}
.gstat:last-child{border-right:none}
.gstat-val{font-family:var(--serif);font-size:17px;font-weight:500;margin-bottom:1px}
.gstat-lbl{font-size:10px;color:var(--text3);letter-spacing:.5px;text-transform:uppercase}
.cal-nav{display:flex;align-items:center;justify-content:space-between;padding:14px 16px;border-bottom:1px solid var(--border)}
.cal-month-title{font-family:var(--serif);font-size:18px;font-weight:500}
.cal-grid{display:grid;grid-template-columns:repeat(7,1fr);padding:10px 8px}
.cal-day-lbl{text-align:center;font-size:10px;font-weight:600;letter-spacing:.8px;text-transform:uppercase;color:var(--text3);padding:4px 0;margin-bottom:4px}
.cal-day{min-height:52px;border-radius:10px;padding:5px 4px;cursor:pointer;transition:background .15s;display:flex;flex-direction:column;align-items:center}
.cal-day:active{background:var(--blush)}
.cal-day.other{opacity:.3}
.cal-day.today{background:var(--cream)}
.cal-day.has-s{background:var(--bg2)}
.cal-day-n{font-size:12px;font-weight:500;color:var(--text2);margin-bottom:3px}
.cal-day.today .cal-day-n{color:var(--tan);font-weight:700}
.pip-row{display:flex;flex-wrap:wrap;gap:2px;justify-content:center}
.pip{width:6px;height:6px;border-radius:50%}
.cal-count{font-size:9px;font-weight:700;color:var(--tan)}
.sess-item{display:flex;align-items:center;justify-content:space-between;padding:12px 16px;border-bottom:1px solid var(--border)}
.sess-item:last-child{border-bottom:none}
.sess-date{font-weight:500;font-size:14px}
.sess-hrs{font-size:12px;color:var(--text3);margin-top:2px}
.sess-fee{font-family:var(--serif);font-size:16px;color:var(--tan);font-weight:500}
.pay-item{display:flex;align-items:center;justify-content:space-between;padding:12px 16px;border-bottom:1px solid var(--border)}
.pay-item:last-child{border-bottom:none}
.detail-hero{background:var(--bg2);padding:18px 16px 16px;border-bottom:1px solid var(--border);display:flex;align-items:center;gap:14px}
.detail-av{width:54px;height:54px;border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:20px;font-weight:600}
.detail-name{font-family:var(--serif);font-size:22px;font-weight:500}
.detail-sub{font-size:12px;color:var(--text3);margin-top:3px}
.balance-bar{display:flex;border-top:1px solid var(--border);border-bottom:1px solid var(--border)}
.bal-cell{flex:1;padding:14px 10px;text-align:center;border-right:1px solid var(--border)}
.bal-cell:last-child{border-right:none}
.bal-val{font-family:var(--serif);font-size:18px;font-weight:500;margin-bottom:2px}
.bal-lbl{font-size:10px;color:var(--text3);letter-spacing:.5px;text-transform:uppercase}
.action-strip{display:flex;gap:10px;padding:12px 16px;background:var(--bg2);flex-wrap:wrap}
.group-detail-hero{padding:18px 16px 0;background:var(--bg2);border-bottom:1px solid var(--border)}
.group-detail-top{display:flex;align-items:center;gap:14px;padding-bottom:16px}
.group-balance-bar{display:flex;border-top:1px solid var(--border);margin:0 -16px}
.grp-bal{flex:1;padding:12px 10px;text-align:center;border-right:1px solid var(--border)}
.grp-bal:last-child{border-right:none}
.grp-bal-val{font-family:var(--serif);font-size:18px;font-weight:500;margin-bottom:2px}
.grp-bal-lbl{font-size:10px;color:var(--text3);letter-spacing:.5px;text-transform:uppercase}
.video-card{background:var(--card);border:1px solid var(--border);border-radius:var(--r);box-shadow:var(--shadow);overflow:hidden;margin-bottom:10px}
.video-thumb{width:100%;aspect-ratio:16/9;background:var(--bg3);display:flex;align-items:center;justify-content:center;font-size:36px;cursor:pointer;position:relative}
.video-info{padding:12px 14px}
.video-title{font-weight:500;font-size:14px}
.video-meta{font-size:12px;color:var(--text3);margin-top:3px}
.upload-zone{border:2px dashed var(--border2);border-radius:var(--r);padding:28px;text-align:center;cursor:pointer;background:var(--bg3);transition:all .15s}
.upload-zone:hover{border-color:var(--tan);background:var(--cream)}
.portal-hero{background:var(--bg2);border-bottom:1px solid var(--border);padding:20px 16px}
.portal-name{font-family:var(--serif);font-size:24px;font-weight:500}
.portal-sub{font-size:13px;color:var(--text3);margin-top:3px}
.login-wrap{flex:1;display:flex;flex-direction:column;align-items:center;justify-content:center;padding:32px 24px;background:var(--bg)}
.login-logo{font-family:var(--serif);font-size:38px;font-weight:500;margin-bottom:6px}
.login-logo span{color:var(--tan);font-style:italic}
.login-card{background:var(--card);border:1px solid var(--border);border-radius:var(--r-lg);padding:28px 24px;width:100%;max-width:420px;box-shadow:var(--shadow-lg)}
.login-err{background:var(--red-lt);color:var(--red);border-radius:var(--r-sm);padding:10px 14px;font-size:13px;margin-bottom:14px}
.modal-overlay{position:fixed;inset:0;background:rgba(60,47,36,.45);display:flex;align-items:flex-end;justify-content:center;z-index:200;backdrop-filter:blur(3px)}
.modal{background:var(--card);border-radius:24px 24px 0 0;padding:0 0 max(env(safe-area-inset-bottom),12px);width:100%;max-height:90vh;overflow-y:auto;-webkit-overflow-scrolling:touch}
.modal-handle{width:36px;height:4px;background:var(--border2);border-radius:2px;margin:12px auto 0}
.modal-header{display:flex;align-items:center;justify-content:space-between;padding:16px 20px 14px;border-bottom:1px solid var(--border)}
.modal-title{font-family:var(--serif);font-size:20px;font-weight:500}
.modal-body{padding:20px}
.modal-footer{padding:0 20px 8px;display:flex;gap:10px}
.modal-footer .btn{flex:1}
.check-list{display:flex;flex-direction:column;gap:6px;max-height:240px;overflow-y:auto}
.check-item{display:flex;align-items:center;gap:12px;padding:11px 14px;border:1.5px solid var(--border);border-radius:10px;cursor:pointer;transition:all .15s;background:var(--bg3)}
.check-item.selected{border-color:var(--tan);background:#F0DDD0}
.check-item-name{font-weight:500;font-size:14px;flex:1}
.check-item-meta{font-size:12px;color:var(--text3)}
.checkmark{width:22px;height:22px;border-radius:50%;border:2px solid var(--border2);display:flex;align-items:center;justify-content:center;flex-shrink:0;transition:all .15s;font-size:13px}
.check-item.selected .checkmark{background:var(--tan);border-color:var(--tan);color:#fff}
.fee-preview{background:var(--cream);border:1px solid var(--border);border-radius:var(--r-sm);padding:12px;font-size:13px;color:var(--text2);margin-top:4px;text-align:center}
.fee-preview strong{color:var(--tan);font-family:var(--serif);font-size:18px}
.empty{text-align:center;padding:32px 20px;color:var(--text3);font-size:13px}
.empty-icon{font-size:32px;margin-bottom:8px;opacity:.5}
.loading{text-align:center;padding:40px 20px;color:var(--text3);font-size:13px}
.spinner{width:28px;height:28px;border:2px solid var(--border);border-top-color:var(--tan);border-radius:50%;animation:spin .7s linear infinite;margin:0 auto 12px}
@keyframes spin{to{transform:rotate(360deg)}}
::-webkit-scrollbar{width:0}
.toast{position:fixed;bottom:max(env(safe-area-inset-bottom),12px);left:50%;transform:translateX(-50%);background:var(--text);color:#fff;padding:10px 20px;border-radius:20px;font-size:13px;font-weight:500;z-index:999;pointer-events:none;opacity:0;transition:opacity .2s;white-space:nowrap}
.toast.show{opacity:1}