.mark-lesson-container{background:linear-gradient(135deg,#f8f9fa 0%,#fff 100%);border:1px solid #e5e7eb;border-radius:12px;margin-top:3rem;margin-bottom:2rem;padding:2rem;transition:all .3s;box-shadow:0 4px 6px -1px #0000000d,0 2px 4px -1px #00000008}.mark-lesson-container:hover{border-color:#d1d5db;box-shadow:0 10px 15px -3px #0000001a,0 4px 6px -2px #0000000d}.mark-lesson-content{justify-content:space-between;align-items:center;gap:2rem;display:flex}.mark-lesson-text-section{flex:1}.mark-lesson-title{color:var(--color-text-primary,#1f2937);margin:0 0 .5rem;font-size:18px;font-weight:600;line-height:1.4}.mark-lesson-description{color:var(--color-text-secondary,#6b7280);margin:0;font-size:14px;line-height:1.5}.mark-lesson-btn{cursor:pointer;white-space:nowrap;border:2px solid;border-radius:8px;outline:none;flex-shrink:0;justify-content:center;align-items:center;gap:10px;padding:12px 28px;font-size:15px;font-weight:600;transition:all .3s cubic-bezier(.4,0,.2,1);display:inline-flex;position:relative;overflow:hidden}.mark-lesson-btn:before{content:"";pointer-events:none;background:#ffffff1a;width:100%;height:100%;transition:left .5s;position:absolute;top:0;left:-100%}.mark-lesson-btn:hover:not(:disabled):before{left:100%}.mark-lesson-btn:focus-visible{box-shadow:0 0 0 4px #63992226}.mark-lesson-pending{color:#374151;background:linear-gradient(135deg,#fff 0%,#f3f4f6 100%);border-color:#d1d5db}.mark-lesson-pending:hover:not(:disabled){color:#3b6d11;background:linear-gradient(135deg,#63992214 0%,#6399220a 100%);border-color:#639922;transform:translateY(-2px);box-shadow:0 8px 12px -2px #63992226}.mark-lesson-pending:active:not(:disabled){transform:translateY(0);box-shadow:0 4px 6px -2px #6399221a}.mark-lesson-done{color:#3b6d11;background:linear-gradient(135deg,#6399221f 0%,#6399220f 100%);border-color:#639922}.mark-lesson-done:hover:not(:disabled){color:#d32f2f;background:linear-gradient(135deg,#6399221f 0%,#6399220f 100%);border-color:#d32f2f}.mark-lesson-done:active:not(:disabled){transform:translateY(0);box-shadow:0 4px 6px -2px #d32f2f26}.mark-lesson-loading{opacity:.85;cursor:not-allowed}.mark-lesson-icon{flex-shrink:0;justify-content:center;align-items:center;width:20px;height:20px;display:flex}.mark-lesson-spinner{transform-origin:50%;color:currentColor;animation:.8s linear infinite mark-lesson-spin}@keyframes mark-lesson-spin{to{transform:rotate(360deg)}}.mark-lesson-label{font-weight:600;line-height:1}@media (max-width:640px){.mark-lesson-container{padding:1.5rem}.mark-lesson-content{flex-direction:column;gap:1.5rem}.mark-lesson-text-section{width:100%}.mark-lesson-btn{justify-content:center;width:100%;padding:14px 24px}.mark-lesson-title{font-size:16px}.mark-lesson-description{font-size:13px}}
.post-navigation{border-top:1px solid #e0e0e0;margin-top:50px;padding-top:30px}.nav-buttons{justify-content:space-between;gap:20px;display:flex}.nav-button{background-color:#f8f9fa;border:1px solid #e0e0e0;border-radius:8px;flex-direction:column;flex:1;max-width:45%;padding:20px;transition:all .2s;display:flex}.nav-button:hover{background-color:var(--color-red);color:var(--color-white);border-color:var(--color-red)}.nav-previous{text-align:left}.nav-next{text-align:right;margin-left:auto}.nav-direction{color:#666;margin-bottom:5px;font-size:.9rem}.nav-button:hover .nav-direction{color:#fffc}.nav-title{font-size:1rem;font-weight:500}
.toast{z-index:9999;word-wrap:break-word;border-radius:8px;align-items:center;gap:12px;max-width:320px;padding:14px 20px;font-size:14px;font-weight:500;animation:.3s ease-out slideInRight;display:flex;position:fixed;top:24px;right:24px;box-shadow:0 4px 12px #00000026}.toast-success{color:#fff;background:#2e7d32;border:1px solid #1b5e20}.toast-error{color:#fff;background:#d32f2f;border:1px solid #b71c1c}.toast-icon{flex-shrink:0;justify-content:center;align-items:center;font-size:16px;font-weight:700;display:flex}.toast-message{align-items:center;line-height:1.4;display:flex}@keyframes slideInRight{0%{opacity:0;transform:translate(24px)}to{opacity:1;transform:translate(0)}}@media (max-width:640px){.toast{max-width:none;top:16px;left:16px;right:16px}}