/* Mobile-first structural safety layer shared by every public/user page. */
:root{--content-gutter:12px;--shell-max:100%;--tap-size:44px}html{overflow-x:hidden;-webkit-text-size-adjust:100%}body{min-width:280px}img,video,canvas,svg{max-width:100%}iframe{max-width:100%;border:0}button,input,select,textarea{max-width:100%;font:inherit}button,a,input,select,textarea,summary{touch-action:manipulation}input:not([type=checkbox]):not([type=radio]):not([type=hidden]),select,textarea,button{min-height:var(--tap-size)}.slider-dots button{min-height:9px}.app-shell{width:100%;max-width:var(--shell-max);box-shadow:none}.page-content{min-width:0;padding-right:var(--content-gutter);padding-left:var(--content-gutter)}.page-content>*{min-width:0}.topbar{top:8px;width:calc(100% - 20px)}.bottom-nav{bottom:max(14px,env(safe-area-inset-bottom));width:min(calc(100% - 24px),406px)}.bottom-nav a{min-width:50px}.notification-panel{width:calc(100% - 20px)}table{max-width:100%}.admin-responsive-table,.table-responsive,.responsive-table,[class*=table-wrap]{overflow-x:auto;-webkit-overflow-scrolling:touch}dialog{max-width:calc(100% - 20px);max-height:calc(100dvh - 20px)}.jalali-datetime-fields{display:grid;grid-template-columns:minmax(0,1fr) minmax(105px,.45fr);gap:8px;width:100%}.persian-date-visible{direction:rtl;text-align:right}.jdp-container{max-width:calc(100vw - 16px)!important;z-index:7000!important}
@media(max-width:479px){.page-content{padding-top:8px}.topbar-inner{height:56px}.bottom-nav a{font-size:12px}.bottom-nav svg{width:24px;height:24px}.jalali-datetime-fields{grid-template-columns:1fr}.ai-brain-grid,.psych-scorecard>div,.daily-checkin-card form>div,.settings-tabs,.profile-grid,.form-grid,.modal-form,.goal-create-form{grid-template-columns:1fr!important}.tool-section-title,.exam-analysis-head,.student-case-hero,.teachers-directory-hero,.resource-directory-hero{align-items:flex-start!important;flex-direction:column!important}.student-case-page,.study-dashboard,.profile-page{min-width:0}.student-case-section,.student-exam-analysis,.ai-study-planner,.ai-coach-center,.ai-student-brain{padding-right:13px!important;padding-left:13px!important}.exam-result-pills,.student-case-actions{width:100%;overflow-x:auto}.toast-stack{top:8px}}
@media(min-width:480px){:root{--content-gutter:18px}.app-shell{max-width:720px}.topbar{width:min(calc(100% - 28px),692px)}}
@media(min-width:768px){:root{--content-gutter:26px;--shell-max:980px}.app-shell{padding-top:92px;padding-bottom:100px;border-radius:0 0 28px 28px;box-shadow:0 22px 70px rgba(15,23,42,.12)}.topbar{top:14px;width:min(calc(100% - 40px),940px)}.topbar-inner{height:62px;padding:0 16px}.bottom-nav{bottom:18px}.page-content{padding-top:24px;padding-bottom:30px}.notification-panel{top:84px;width:min(460px,calc(100% - 40px))}.jalali-datetime-fields{grid-template-columns:minmax(170px,1fr) 120px}}
/* A genuinely desktop composition: permanent rail, workspace header and fluid canvas. */
.desktop-nav-head,.desktop-page-heading{display:none}
@media(min-width:1100px){
  :root{--content-gutter:30px;--desktop-rail:248px;--shell-max:none}
  body.mobile-frame-page{background:linear-gradient(145deg,#f8fafc 0,#eef3f9 48%,#f1f5fb 100%)}
  .app-shell{width:100%;max-width:none;min-height:100vh;margin:0;padding:92px 0 42px var(--content-gutter);padding-right:calc(var(--desktop-rail) + var(--content-gutter));border:0;border-radius:0;background:transparent;box-shadow:none;overflow:visible}
  .app-shell.chat-app-shell{padding-right:var(--content-gutter);padding-bottom:0}
  .page-content{width:100%;max-width:1680px;min-height:calc(100vh - 118px);margin:0 auto;padding:24px 0 40px}
  .topbar{top:18px;right:calc(var(--desktop-rail) + var(--content-gutter));left:var(--content-gutter);width:auto;border-color:rgba(203,213,225,.78);border-radius:18px;background:rgba(255,255,255,.92);box-shadow:0 12px 34px rgba(15,23,42,.07);transform:none;backdrop-filter:blur(16px)}
  .chat-app-shell .topbar{right:var(--content-gutter)}
  .topbar-inner{display:grid;grid-template-columns:48px 48px minmax(0,1fr) auto;height:64px;padding:0 10px 0 18px}
  .topbar .notification-toggle{grid-column:1}.topbar .header-chat-link,.topbar .chat-back-button{grid-column:2}.topbar .desktop-page-heading{grid-column:3;grid-row:1}.topbar .brand{grid-column:4;grid-row:1}
  .desktop-page-heading{display:grid;align-content:center;justify-items:start;gap:1px;padding-right:14px;border-right:1px solid #e2e8f0}
  .desktop-page-heading small{color:#94a3b8;font-size:10px;font-weight:800}.desktop-page-heading strong{color:#172033;font-size:16px;font-weight:900}
  .brand{justify-self:end}.brand img,.brand-mark{width:42px;height:42px;border-radius:12px}
  .header-icon{border-color:transparent;background:#f1f5f9}.header-icon:hover{color:var(--brand);background:#eaf1ff}
  .bottom-nav{top:18px;right:18px;bottom:18px;display:flex;width:var(--desktop-rail);height:auto;min-height:0;flex-direction:column;gap:7px;border:1px solid rgba(203,213,225,.82);border-radius:24px;padding:16px;background:linear-gradient(180deg,#fff,#f8fafc);box-shadow:0 20px 55px rgba(15,23,42,.10);transform:none}
  .desktop-nav-head{display:grid;gap:16px;margin-bottom:8px;padding:4px 3px 16px;border-bottom:1px solid #e7edf4}
  .desktop-nav-brand{display:flex!important;min-height:52px!important;align-items:center!important;justify-content:flex-start!important;gap:11px!important;padding:0!important;background:transparent!important;box-shadow:none!important;overflow:visible!important}
  .desktop-nav-brand img,.desktop-nav-brand>i{display:grid;width:46px;height:46px;place-items:center;flex:0 0 46px;border-radius:14px;object-fit:contain;color:#fff;background:linear-gradient(145deg,var(--brand),#14b8a6);font-style:normal;font-weight:900}
  .desktop-nav-brand>span{display:grid!important;max-width:none!important;opacity:1!important;transform:none!important}.desktop-nav-brand strong{color:#172033;font-size:14px}.desktop-nav-brand small{color:#94a3b8;font-size:8px;font-weight:800}
  .desktop-user-card{display:flex;align-items:center;gap:9px;border:1px solid #e8edf3;border-radius:14px;padding:9px;background:#f8fafc}
  .desktop-user-card>b{display:grid;width:34px;height:34px;place-items:center;flex:0 0 34px;border-radius:11px;color:#fff;background:linear-gradient(135deg,#475569,#0f172a);font-size:13px}.desktop-user-card>span{display:grid;min-width:0;max-width:none;opacity:1;overflow:hidden;transform:none}.desktop-user-card strong{overflow:hidden;color:#334155;font-size:10px;text-overflow:ellipsis;white-space:nowrap}.desktop-user-card small{overflow:hidden;color:#94a3b8;font-size:8px;text-overflow:ellipsis;white-space:nowrap}
  .bottom-nav>a{width:100%;min-width:0;min-height:48px;flex:0 0 auto!important;justify-content:flex-start;gap:12px!important;border-radius:13px;padding:0 14px;color:#64748b;font-size:11px;overflow:visible}
  .bottom-nav>a span{display:inline-block;max-width:none!important;opacity:1!important;transform:none!important;overflow:visible}
  .bottom-nav>a svg{width:22px;height:22px;flex:0 0 auto}.bottom-nav>a.is-active{color:#fff;background:linear-gradient(135deg,var(--brand),#14b8a6);box-shadow:0 9px 20px color-mix(in srgb,var(--brand) 22%,transparent)}
  .notification-panel{top:92px;right:auto;left:30px;width:420px;transform:none}.occasion-floating-wrap{right:calc(var(--desktop-rail) + 30px);bottom:28px}
  .home-grid,.dashboard-grid,.student-comparison-grid{gap:20px}.teachers-home-grid{grid-template-columns:repeat(4,minmax(0,1fr))}.teachers-directory-grid,.resource-directory-grid{grid-template-columns:repeat(3,minmax(0,1fr))}.ai-brain-grid{grid-template-columns:repeat(3,minmax(0,1fr))}.ai-brain-grid>.daily-checkin-card{grid-column:span 2}.student-case-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .services-grid{grid-template-columns:repeat(6,minmax(0,1fr))}.blog-grid{grid-template-columns:repeat(4,minmax(0,1fr))}.achiever-grid{grid-template-columns:repeat(3,minmax(0,1fr))}
  .services-box,.teachers-home,.achievers-showcase,.blog-box,.study-dashboard>section,.profile-form,.subscription-page>section{border-radius:24px}
  .section-title span,.teachers-home-head h2,.achievers-heading h2{font-size:20px}
  .page-home .slider-track{height:clamp(330px,31vw,470px);min-height:0;aspect-ratio:auto;border-radius:26px}
  .page-home .home-slider{margin-bottom:22px}.page-home .slider-dots{right:26px;bottom:22px}
  .home-tools-layout{display:grid;grid-template-columns:minmax(0,1.45fr) minmax(340px,.75fr);align-items:stretch;gap:20px;margin:20px 0}
  .home-tools-layout .services-box{display:grid;align-content:start;margin:0;padding:22px}.home-tools-layout .exam-countdown{height:100%;min-height:184px;align-content:center;margin:0;padding:22px}
  .home-tools-layout .exam-countdown-copy{margin-bottom:8px}.home-tools-layout .exam-countdown-units strong{font-size:30px}.home-tools-layout .exam-date-label{top:22px;left:20px}
  .page-home .daily-quote{padding:22px 26px}.page-home .daily-quote p{font-size:20px}.page-home .resource-home-feature{min-height:132px;margin-top:0;padding:24px 28px}.page-home .resource-home-copy strong{font-size:23px}
  .page-home .teacher-card{min-height:230px;padding-top:21px}.page-home .teacher-photo{width:94px;height:94px}.page-home .blog-card{grid-template-columns:1fr}.page-home .blog-thumb{aspect-ratio:16/9}.page-home .blog-content{padding:16px}
}
@media(min-width:1440px){:root{--content-gutter:38px;--desktop-rail:264px}.bottom-nav{right:24px;width:var(--desktop-rail);padding:18px}.topbar{top:20px}.page-content{padding-top:30px}.services-box,.teachers-home,.achievers-showcase,.blog-box{padding:24px}}
@media(min-width:1800px){:root{--content-gutter:46px;--desktop-rail:280px}.page-content{max-width:none}.bottom-nav{right:28px}.topbar{left:46px}}
@media(hover:hover){button,a,summary{transition:transform .18s ease,box-shadow .18s ease,background-color .18s ease}button:not(:disabled):hover{transform:translateY(-1px)}}
@media(prefers-reduced-motion:reduce){*,*::before,*::after{scroll-behavior:auto!important;animation-duration:.01ms!important;animation-iteration-count:1!important;transition-duration:.01ms!important}}