/* =========================================================
   Student Panel
   ========================================================= */

/* ====== Login ====== */
.stu-login-body {
    background: var(--c-bg);
    margin: 0;
}
.stu-login-wrap {
    min-height: 100vh;
    display: grid;
    grid-template-columns: 1fr 1fr;
    align-items: stretch;
}
.stu-login-card {
    display: flex;
    flex-direction: column;
    justify-content: center;
    max-width: 460px;
    margin: 0 auto;
    padding: var(--sp-8) var(--sp-6);
    width: 100%;
}
.stu-login-logo {
    width: 68px; height: 68px;
    border-radius: var(--radius-lg);
    background: linear-gradient(135deg, var(--c-primary-600), var(--c-primary-700));
    color: #fff;
    display: grid; place-items: center;
    font-size: 30px;
    margin-bottom: var(--sp-5);
    box-shadow: 0 8px 20px rgba(61,95,143,.28);
}
.stu-login-card h1 {
    font-size: 26px;
    font-weight: 800;
    margin: 0 0 8px;
    color: var(--c-text);
}
.stu-login-sub {
    color: var(--c-text-muted);
    font-size: var(--fs-md);
    margin: 0 0 var(--sp-6);
}

.stu-login-card .field {
    display: flex; flex-direction: column; gap: 6px;
    margin-bottom: var(--sp-4);
}
.stu-login-card label {
    font-size: var(--fs-sm);
    color: var(--c-text-soft);
    font-weight: 500;
}
.stu-login-card label .req { color: var(--c-danger); }
.input-wrap {
    position: relative;
}
.input-wrap > i {
    position: absolute;
    right: 14px; top: 50%;
    transform: translateY(-50%);
    color: var(--c-text-muted);
    font-size: 14px;
    pointer-events: none;
}
.input-wrap .form-input {
    height: 46px;
    padding-right: 40px;
    font-size: var(--fs-md);
}
.form-hint {
    color: var(--c-text-muted);
    font-size: var(--fs-xs);
}
.field-error {
    color: var(--c-danger);
    font-size: var(--fs-xs);
    min-height: 14px;
}
.field.has-error .form-input {
    border-color: var(--c-danger);
    box-shadow: 0 0 0 3px rgba(194,90,84,.10);
}

.btn-login {
    width: 100%;
    height: 50px;
    margin-top: var(--sp-3);
    border-radius: var(--radius-md);
    background: linear-gradient(135deg, var(--c-primary-600), var(--c-primary-700));
    color: #fff;
    font-size: var(--fs-lg);
    font-weight: 600;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    box-shadow: 0 6px 16px rgba(61,95,143,.28);
    transition: all var(--t-base);
    border: none;
    cursor: pointer;
    font-family: inherit;
}
.btn-login:hover { transform: translateY(-1px); box-shadow: 0 10px 22px rgba(61,95,143,.35); }
.btn-login:disabled { opacity: .6; cursor: not-allowed; transform: none; }

.stu-login-link {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: var(--fs-sm);
    color: var(--c-text-muted);
    transition: color var(--t-fast);
}
.stu-login-link:hover { color: var(--c-primary-600); }

/* Side panel */
.stu-login-side {
    background: linear-gradient(160deg, #2f4a72 0%, #1d2d46 100%);
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--sp-8);
    position: relative;
    overflow: hidden;
}
.stu-login-side::before {
    content: '';
    position: absolute;
    top: -200px; right: -200px;
    width: 500px; height: 500px;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(201,164,90,.10), transparent 70%);
}
.stu-login-side-content {
    max-width: 400px;
    position: relative;
    z-index: 1;
}
.stu-login-side h2 {
    font-size: 28px;
    font-weight: 800;
    margin: 0 0 var(--sp-3);
}
.stu-login-side p {
    color: rgba(255,255,255,.75);
    line-height: 1.9;
    font-size: var(--fs-md);
    margin: 0 0 var(--sp-6);
}
.stu-features {
    list-style: none;
    padding: 0;
    margin: 0;
    display: flex;
    flex-direction: column;
    gap: 12px;
}
.stu-features li {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 16px;
    background: rgba(255,255,255,.06);
    border: 1px solid rgba(255,255,255,.10);
    border-radius: var(--radius-md);
    font-size: var(--fs-md);
    color: rgba(255,255,255,.9);
}
.stu-features i { color: var(--c-accent); font-size: 16px; }

@media (max-width: 900px) {
    .stu-login-wrap { grid-template-columns: 1fr; }
    .stu-login-side { display: none; }
}

/* ====== Header ====== */
.stu-header {
    background: var(--c-surface);
    border-bottom: 1px solid var(--c-border);
    position: sticky;
    top: 0;
    z-index: 50;
    backdrop-filter: blur(8px);
}
.stu-header-inner {
    max-width: 1200px;
    margin: 0 auto;
    padding: 12px var(--sp-5);
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--sp-4);
    flex-wrap: wrap;
}
.stu-brand {
    display: flex;
    align-items: center;
    gap: 12px;
}
.stu-logo {
    width: 42px; height: 42px;
    border-radius: var(--radius-md);
    background: linear-gradient(135deg, var(--c-primary-600), var(--c-primary-700));
    color: #fff;
    display: grid; place-items: center;
    font-size: 18px;
}
.stu-brand-text strong { display: block; font-size: var(--fs-md); font-weight: 700; color: var(--c-text); }
.stu-brand-text small  { color: var(--c-text-muted); font-size: var(--fs-xs); }

.stu-user {
    display: flex;
    align-items: center;
    gap: 12px;
}
.stu-user-info { text-align: left; }
.stu-user-info strong { display: block; font-size: var(--fs-md); font-weight: 600; color: var(--c-text); }
.stu-user-info small  { color: var(--c-text-muted); font-size: var(--fs-xs); }

.stu-avatar {
    width: 40px; height: 40px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--c-primary-600), var(--c-primary-700));
    color: #fff;
    display: grid; place-items: center;
    font-weight: 700;
    font-size: 15px;
}
.stu-logout {
    width: 38px; height: 38px;
    border-radius: var(--radius-md);
    display: grid; place-items: center;
    background: var(--c-surface-2);
    color: var(--c-text-muted);
    border: 1px solid var(--c-border);
    transition: all var(--t-fast);
}
.stu-logout:hover {
    background: rgba(194,90,84,.10);
    color: var(--c-danger);
    border-color: transparent;
}

/* ====== Dashboard ====== */
.stu-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: var(--sp-6) var(--sp-5);
}

.stu-welcome {
    background: linear-gradient(135deg, var(--c-primary-50), var(--c-surface));
    border: 1px solid var(--c-border);
    border-radius: var(--radius-lg);
    padding: var(--sp-5) var(--sp-6);
    margin-bottom: var(--sp-5);
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--sp-4);
    flex-wrap: wrap;
}
.stu-welcome-text h2 {
    margin: 0 0 6px;
    font-size: 20px;
    font-weight: 700;
    color: var(--c-text);
}
.stu-welcome-text p {
    margin: 0;
    color: var(--c-text-muted);
    font-size: var(--fs-md);
}

.stu-total-box {
    background: var(--c-surface);
    border: 2px solid var(--c-border);
    border-radius: var(--radius-lg);
    padding: var(--sp-4) var(--sp-5);
    text-align: center;
    min-width: 220px;
}
.stu-total-box.has-debt { border-color: rgba(194,90,84,.30); background: rgba(194,90,84,.04); }
.stu-total-box.is-clear { border-color: rgba(63,138,106,.30); background: rgba(63,138,106,.04); }
.stu-total-box .tb-label {
    font-size: var(--fs-xs);
    color: var(--c-text-muted);
    margin-bottom: 4px;
}
.stu-total-box .tb-value {
    font-size: 22px;
    font-weight: 800;
    direction: ltr;
    color: var(--c-text);
    line-height: 1.2;
}
.stu-total-box.has-debt .tb-value { color: var(--c-danger); }
.stu-total-box.is-clear .tb-value { color: var(--c-success); }
.stu-total-box .tb-hint {
    font-size: var(--fs-xs);
    color: var(--c-text-muted);
    margin-top: 4px;
}

/* Tabs */
.stu-tabs {
    display: flex;
    gap: 4px;
    background: var(--c-surface-2);
    border: 1px solid var(--c-border);
    border-radius: var(--radius-md);
    padding: 4px;
    margin-bottom: var(--sp-4);
    overflow-x: auto;
}
.stu-tab {
    flex: 1;
    min-width: 140px;
    padding: 10px 16px;
    border-radius: var(--radius-sm);
    font-size: var(--fs-md);
    font-weight: 500;
    color: var(--c-text-soft);
    background: transparent;
    border: none;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    transition: all var(--t-fast);
    font-family: inherit;
    white-space: nowrap;
}
.stu-tab:hover { color: var(--c-primary-600); }
.stu-tab.active {
    background: var(--c-surface);
    color: var(--c-primary-700);
    box-shadow: var(--shadow-xs);
}

/* Cards */
.stu-card {
    background: var(--c-surface);
    border: 1px solid var(--c-border);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-xs);
    overflow: hidden;
    margin-bottom: var(--sp-4);
}
.stu-card-head {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--sp-4) var(--sp-5);
    border-bottom: 1px solid var(--c-border);
    background: var(--c-surface-2);
}
.stu-card-head h3 {
    margin: 0;
    font-size: var(--fs-lg);
    font-weight: 600;
    color: var(--c-text);
    display: inline-flex;
    align-items: center;
    gap: 8px;
}
.stu-card-head h3 i { color: var(--c-primary-600); font-size: 14px; }

/* Debt item */
.debt-list { padding: var(--sp-2); }
.debt-item {
    display: flex;
    align-items: center;
    gap: var(--sp-4);
    padding: var(--sp-4);
    border-radius: var(--radius-md);
    transition: background var(--t-fast);
    border-bottom: 1px solid var(--c-border-soft);
}
.debt-item:last-child { border-bottom: none; }
.debt-item:hover { background: var(--c-surface-2); }

.debt-item-icon {
    width: 46px; height: 46px;
    border-radius: var(--radius-md);
    background: rgba(194,90,84,.10);
    color: var(--c-danger);
    display: grid; place-items: center;
    font-size: 18px;
    flex-shrink: 0;
}
.debt-item.paid .debt-item-icon {
    background: rgba(63,138,106,.10);
    color: var(--c-success);
}
.debt-item-info { flex: 1; min-width: 0; }
.debt-item-info strong {
    display: block;
    font-size: var(--fs-md);
    font-weight: 600;
    color: var(--c-text);
    margin-bottom: 2px;
}
.debt-item-info small {
    color: var(--c-text-muted);
    font-size: var(--fs-xs);
}
.debt-item-amounts {
    text-align: left;
    direction: ltr;
    font-family: 'Courier New', monospace;
}
.debt-item-amounts .main {
    font-size: 15px;
    font-weight: 700;
    color: var(--c-danger);
}
.debt-item.paid .debt-item-amounts .main { color: var(--c-success); }
.debt-item-amounts .sub {
    font-size: 11px;
    color: var(--c-text-muted);
}

.btn-pay {
    padding: 8px 16px;
    border-radius: var(--radius-md);
    background: linear-gradient(135deg, var(--c-primary-600), var(--c-primary-700));
    color: #fff;
    font-family: inherit;
    font-size: var(--fs-sm);
    font-weight: 600;
    border: none;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    gap: 6px;
    transition: all var(--t-fast);
    box-shadow: 0 4px 10px rgba(61,95,143,.22);
    white-space: nowrap;
}
.btn-pay:hover { transform: translateY(-1px); box-shadow: 0 6px 14px rgba(61,95,143,.30); }
.btn-pay:disabled { opacity: .5; cursor: not-allowed; transform: none; }

/* History */
.history-list { padding: var(--sp-2); }
.history-item {
    display: flex;
    align-items: center;
    gap: var(--sp-3);
    padding: var(--sp-3) var(--sp-4);
    border-radius: var(--radius-md);
    border-bottom: 1px solid var(--c-border-soft);
}
.history-item:last-child { border-bottom: none; }
.history-icon {
    width: 38px; height: 38px;
    border-radius: 50%;
    background: rgba(63,138,106,.12);
    color: var(--c-success);
    display: grid; place-items: center;
    font-size: 14px;
    flex-shrink: 0;
}
.history-info { flex: 1; }
.history-info strong { display: block; font-size: var(--fs-md); font-weight: 600; }
.history-info small  { color: var(--c-text-muted); font-size: var(--fs-xs); }
.history-amount {
    font-weight: 700;
    color: var(--c-success);
    direction: ltr;
    font-family: 'Courier New', monospace;
}

/* Empty */
.stu-empty {
    text-align: center;
    padding: var(--sp-8) var(--sp-4);
    color: var(--c-text-muted);
}
.stu-empty i {
    font-size: 48px;
    color: var(--c-border);
    margin-bottom: var(--sp-3);
    display: block;
}
.stu-empty h4 {
    margin: 0 0 6px;
    font-size: var(--fs-lg);
    color: var(--c-text-soft);
}

/* Modal پرداخت */
.stu-modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(15,22,32,.55);
    backdrop-filter: blur(3px);
    display: none;
    align-items: center;
    justify-content: center;
    z-index: 300;
    padding: var(--sp-4);
}
.stu-modal-overlay.open { display: flex; }

.stu-modal {
    background: var(--c-surface);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    width: 100%;
    max-width: 460px;
    overflow: hidden;
    animation: stuModalIn .25s ease;
}
@keyframes stuModalIn {
    from { opacity: 0; transform: translateY(20px) scale(.97); }
    to   { opacity: 1; transform: translateY(0) scale(1); }
}
.stu-modal-head {
    padding: var(--sp-4) var(--sp-5);
    border-bottom: 1px solid var(--c-border);
    display: flex;
    align-items: center;
    justify-content: space-between;
}
.stu-modal-head h3 { margin: 0; font-size: var(--fs-lg); font-weight: 600; }
.stu-modal-head button {
    width: 34px; height: 34px;
    border-radius: var(--radius-sm);
    display: grid; place-items: center;
    background: none; border: none; cursor: pointer;
    color: var(--c-text-muted);
    transition: all var(--t-fast);
}
.stu-modal-head button:hover { background: var(--c-surface-2); color: var(--c-danger); }

.stu-modal-body { padding: var(--sp-5); }
.stu-modal-body .field {
    display: flex; flex-direction: column; gap: 6px;
    margin-bottom: var(--sp-4);
}
.stu-modal-body label { font-size: var(--fs-sm); color: var(--c-text-soft); font-weight: 500; }
.stu-modal-body .form-input { height: 44px; font-size: var(--fs-md); }

.pay-summary {
    background: var(--c-primary-50);
    border: 1px solid var(--c-primary-200);
    border-radius: var(--radius-md);
    padding: var(--sp-3) var(--sp-4);
    margin-bottom: var(--sp-4);
    display: flex;
    align-items: center;
    justify-content: space-between;
    font-size: var(--fs-sm);
    color: var(--c-primary-700);
}
.pay-summary strong { font-size: 18px; direction: ltr; font-family: monospace; }

.stu-modal-foot {
    padding: var(--sp-4) var(--sp-5);
    border-top: 1px solid var(--c-border);
    background: var(--c-surface-2);
    display: flex;
    gap: var(--sp-2);
}
.stu-modal-foot .btn { flex: 1; justify-content: center; }

/* Processing */
.stu-processing {
    text-align: center;
    padding: var(--sp-8) var(--sp-4);
}
.stu-processing i {
    font-size: 46px;
    color: var(--c-primary-500);
    margin-bottom: var(--sp-4);
    display: block;
}
.stu-processing h3 {
    margin: 0 0 8px;
    color: var(--c-text);
}
.stu-processing p {
    color: var(--c-text-muted);
    margin: 0;
}

/* Result page */
.stu-result-wrap {
    max-width: 520px;
    margin: var(--sp-8) auto;
    padding: 0 var(--sp-5);
}
.stu-result-card {
    background: var(--c-surface);
    border: 1px solid var(--c-border);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-md);
    padding: var(--sp-8) var(--sp-6);
    text-align: center;
}
.stu-result-icon {
    width: 84px; height: 84px;
    border-radius: 50%;
    display: grid; place-items: center;
    margin: 0 auto var(--sp-5);
    font-size: 40px;
}
.stu-result-card.success .stu-result-icon {
    background: rgba(63,138,106,.12);
    color: var(--c-success);
}
.stu-result-card.failed .stu-result-icon {
    background: rgba(194,90,84,.12);
    color: var(--c-danger);
}
.stu-result-card h2 {
    font-size: 22px;
    font-weight: 700;
    margin: 0 0 var(--sp-2);
    color: var(--c-text);
}
.stu-result-card p {
    color: var(--c-text-muted);
    margin: 0 0 var(--sp-5);
    line-height: 1.9;
}
.stu-result-info {
    background: var(--c-surface-2);
    border: 1px solid var(--c-border);
    border-radius: var(--radius-md);
    padding: var(--sp-4);
    margin-bottom: var(--sp-5);
    text-align: right;
}
.stu-result-info .row {
    display: flex;
    justify-content: space-between;
    padding: 6px 0;
    font-size: var(--fs-md);
    border-bottom: 1px dashed var(--c-border);
}
.stu-result-info .row:last-child { border-bottom: none; }
.stu-result-info .row span { color: var(--c-text-muted); }
.stu-result-info .row strong { color: var(--c-text); direction: ltr; font-family: monospace; }
.stu-result-actions {
    display: flex;
    gap: var(--sp-2);
}
.stu-result-actions .btn { flex: 1; justify-content: center; }

/* Responsive */
@media (max-width: 700px) {
    .stu-header-inner { padding: 10px 14px; }
    .stu-brand-text small { display: none; }
    .stu-container { padding: var(--sp-4) 14px; }
    .stu-welcome { padding: var(--sp-4); }
    .debt-item { flex-wrap: wrap; gap: 10px; }
    .debt-item-amounts { flex-basis: 100%; text-align: right; }
    .btn-pay { width: 100%; justify-content: center; }
    .stu-user-info { display: none; }
}