*,
*::before,
*::after {
    box-sizing: border-box;
}

html {
    -webkit-text-size-adjust: 100%;
}

button,
input,
select,
textarea {
    max-width: 100%;
}

.page,
main,
.container {
    min-width: 0;
}

.chart-shell {
    max-width: 100%;
    overflow-x: auto;
    overflow-y: hidden;
    -webkit-overflow-scrolling: touch;
}

.chart-shell .plotly-graph-div {
    min-width: 0;
}

.nav-toggle {
    display: none;
}

@media (max-width: 760px) {
    .site-nav-bar.has-nav-toggle .nav-toggle {
        display: block;
    }
    body {
        padding: 0 !important;
    }

    .page {
        width: 100%;
        padding: 16px 12px 30px;
    }

    .page > .container {
        width: 100%;
        margin: 0;
        padding: 16px;
    }

    body > .container {
        width: calc(100% - 24px);
        margin: 12px auto;
        padding: 18px 14px;
    }

    main {
        width: calc(100% - 24px);
        margin: 10vh auto;
        padding: 20px;
    }

    .topbar,
    .header,
    .top-bar {
        align-items: flex-start;
        flex-wrap: wrap;
        gap: 12px;
    }

    .topbar {
        flex-direction: column;
    }

    .site-nav-bar {
        gap: 14px;
        margin: 0 0 18px;
        padding: 14px;
        border: 1px solid rgba(164, 187, 214, 0.16);
        border-radius: 18px;
        background: linear-gradient(145deg, rgba(19, 43, 67, 0.96), rgba(11, 29, 45, 0.96));
        box-shadow: 0 12px 28px rgba(2, 8, 18, 0.22);
    }

    .site-nav-bar > .brand,
    .site-nav-bar > .portfolio-brand {
        width: auto;
        gap: 10px;
        font-size: 1.05rem;
    }

    .site-nav-bar .brand-mark,
    .site-nav-bar .portfolio-brand-mark {
        width: 36px;
        height: 36px;
        border-radius: 11px;
    }

    .topbar > div {
        width: 100%;
        min-width: 0;
    }

    .nav,
    .top-links,
    .header-actions {
        width: 100%;
        flex-wrap: wrap;
        gap: 8px;
    }

    .site-nav-bar .nav {
        display: grid;
        grid-template-columns: repeat(2, minmax(0, 1fr));
        gap: 8px;
        padding-top: 12px;
        border-top: 1px solid rgba(164, 187, 214, 0.14);
    }

    .site-nav-bar .nav form {
        display: contents;
    }

    .site-nav-bar .nav > a,
    .site-nav-bar .nav > span,
    .site-nav-bar .nav button {
        width: 100%;
        min-width: 0;
        min-height: 44px;
        justify-content: center;
        text-align: center;
        border: 1px solid rgba(164, 187, 214, 0.2);
        border-radius: 11px;
        background: rgba(255, 255, 255, 0.045);
        color: #ecf4ff;
        font-size: 0.9rem;
        font-weight: 700;
    }

    .site-nav-bar .nav > span {
        display: flex;
        align-items: center;
        overflow: hidden;
        padding: 8px 10px;
        color: #a2b6ce;
        text-overflow: ellipsis;
        white-space: nowrap;
    }

    .site-nav-bar .nav > span.account-name {
        grid-column: auto;
        align-items: flex-start;
        justify-content: center;
        gap: 2px;
        min-height: 48px;
        padding: 10px 12px;
        border-color: rgba(90, 169, 255, 0.18);
        background: rgba(7, 24, 39, 0.48);
        text-align: left;
        white-space: normal;
    }

    .account-label {
        color: #8ea8c3;
        font-size: 0.68rem;
        font-weight: 600;
        letter-spacing: 0.07em;
        line-height: 1.2;
        text-transform: uppercase;
    }

    .site-nav-bar .account-name strong,
    .topbar .account-name strong {
        display: block;
        max-width: 100%;
        overflow: hidden;
        color: #ecf4ff;
        font-size: 0.94rem;
        line-height: 1.35;
        text-overflow: ellipsis;
        white-space: nowrap;
    }

    .topbar .account-name {
        display: flex;
        flex: 1 1 calc(50% - 4px);
        flex-direction: column;
        align-items: flex-start;
        justify-content: center;
        gap: 2px;
        min-width: 0;
        min-height: 52px;
        padding: 9px 12px;
        border: 1px solid rgba(90, 169, 255, 0.18);
        border-radius: 11px;
        background: rgba(7, 24, 39, 0.48);
    }

    .site-nav-bar .nav button {
        padding: 8px 10px;
        cursor: pointer;
    }

    .site-nav-bar .nav > a:hover,
    .site-nav-bar .nav button:hover {
        border-color: rgba(90, 169, 255, 0.5);
        background: rgba(90, 169, 255, 0.12);
    }

    .site-nav-bar .nav > a.auth-login {
        border-color: rgba(90, 169, 255, 0.35);
        background: rgba(90, 169, 255, 0.1);
        color: #b9dcff;
    }

    .site-nav-bar .nav > a.auth-signup {
        border-color: #5aa9ff;
        background: #5aa9ff;
        color: #071827;
        box-shadow: 0 6px 16px rgba(90, 169, 255, 0.2);
    }

    .site-nav-bar .nav > a.auth-signup:hover {
        background: #80bdff;
    }

    .site-nav-bar .nav button.auth-logout,
    .topbar .auth-logout-form .auth-logout {
        border-color: rgba(255, 107, 107, 0.38);
        background: rgba(255, 107, 107, 0.09);
        color: #ffb4b4;
    }

    .site-nav-bar .nav button.auth-logout:hover,
    .topbar .auth-logout-form .auth-logout:hover {
        border-color: rgba(255, 107, 107, 0.62);
        background: rgba(255, 107, 107, 0.16);
    }

    .site-nav-bar .nav button.auth-logout {
        grid-column: auto;
        min-height: 48px;
        font-size: 0.94rem;
    }

    .site-nav-bar {
        position: relative;
        align-items: center;
    }

    .site-nav-bar .nav {
        align-self: center;
        width: 100%;
        max-width: 260px;
    }

    .site-nav-bar.has-nav-toggle .nav {
        grid-template-columns: 1fr;
    }

    .site-nav-bar .nav-toggle {
        margin-left: auto;
        min-height: 44px;
        padding: 8px 16px;
        border: 1px solid rgba(90, 169, 255, 0.35);
        border-radius: 11px;
        background: rgba(90, 169, 255, 0.1);
        color: #b9dcff;
        font-size: 0.9rem;
        font-weight: 700;
        cursor: pointer;
    }

    .site-nav-bar.has-nav-toggle:not(.nav-open) .nav {
        display: none;
    }

    .site-nav-bar.has-nav-toggle {
        flex-direction: row;
        flex-wrap: wrap;
        align-items: center;
    }

    .site-nav-bar.has-nav-toggle .nav {
        flex: 1 1 100%;
        max-width: none;
    }

    .site-nav-bar.has-nav-toggle:not(.nav-open) {
        gap: 0;
    }

    .topbar .auth-logout-form {
        flex: 1 1 calc(50% - 4px);
        min-width: 0;
    }

    .topbar .auth-logout-form .auth-logout {
        width: 100%;
        min-height: 52px;
        border: 1px solid rgba(255, 107, 107, 0.38);
        border-radius: 11px;
        font-weight: 700;
    }

    .header-actions > *,
    .top-links > * {
        flex: 1 1 135px;
        text-align: center;
    }

    .btn,
    .link-btn,
    .submit-btn,
    button {
        min-height: 44px;
    }

    .financial-table {
        table-layout: fixed;
        font-size: 0.86rem;
    }

    .financial-table th,
    .financial-table td {
        padding: 9px 7px;
        overflow-wrap: anywhere;
    }

    .financial-table td.amount {
        white-space: normal;
        overflow-wrap: anywhere;
    }

    .search-form,
    .company-picker {
        flex-direction: column;
        align-items: stretch;
    }

    .search-form > *,
    .company-picker > * {
        width: 100%;
    }

    .hero,
    .selected-company-preview,
    .calculator,
    .formula-box,
    .panel {
        padding: 16px;
    }

    .hero .stats {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .company-filter-row {
        align-items: stretch;
    }

    .main-feature .company-filter-row {
        flex-direction: column;
    }

    .main-feature #stock-market-filter {
        flex: 0 0 auto;
        width: 100%;
        min-height: 48px;
        padding: 12px 14px;
    }

    .clear-search-btn {
        min-height: 44px;
    }

    .mini-company {
        min-width: 0;
    }

    .mini-company .actions a,
    .mini-company .actions button,
    .mini-company .actions form {
        flex: 1 1 100px;
    }

    .container ul > li {
        flex-direction: column;
        align-items: stretch;
    }

    .container ul > li > div:last-child {
        width: 100%;
        justify-content: flex-start !important;
    }

    .container ul > li form {
        flex-wrap: wrap;
    }

    .position-value {
        min-width: 0;
        text-align: left;
    }

    .chart-shell iframe {
        min-height: 480px;
    }

    textarea {
        font-size: 12px;
    }

    .mini-company .actions a,
    .mini-company .actions button {
        display: flex;
        align-items: center;
        justify-content: center;
        min-height: 44px;
        font-size: 0.8rem;
    }

    .mini-company .model-select {
        min-height: 44px;
        font-size: 0.8rem;
    }

    .mini-company .model-select-label {
        font-size: 0.65rem;
    }

    .mini-company h4 a {
        display: inline-block;
        padding: 6px 0;
    }

    .model-switcher li a {
        display: inline-block;
        padding: 8px 0;
    }

    .sensitivity-table th,
    .sensitivity-table td {
        padding: 6px 5px !important;
        font-size: 0.8rem;
    }
}

@media (max-width: 420px) {
    .site-nav-bar {
        padding: 12px;
        border-radius: 15px;
    }

    .site-nav-bar .nav .btn {
        flex: initial;
    }

    .nav .btn,
    .header-actions > *,
    .top-links > * {
        flex: 1 1 100%;
    }

    .company-filter-row {
        flex-direction: column;
    }

    .hero .stats {
        grid-template-columns: 1fr;
    }

    .summary-value {
        font-size: 22px;
    }

    .container {
        border-radius: 14px;
    }
}