@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&display=swap');

:root {
    /* Design Tokens - Colors HSL */
    --color-primary-hue: 221;
    --color-primary-sat: 83%;
    --color-primary: hsl(var(--color-primary-hue), var(--color-primary-sat), 53%);
    --color-primary-hover: hsl(var(--color-primary-hue), var(--color-primary-sat), 43%);
    --color-primary-subtle: hsla(var(--color-primary-hue), var(--color-primary-sat), 53%, 0.06);
    --color-primary-border: hsla(var(--color-primary-hue), var(--color-primary-sat), 53%, 0.2);

    --color-success-hue: 142;
    --color-success-sat: 72%;
    --color-success: hsl(var(--color-success-hue), var(--color-success-sat), 29%);
    --color-success-hover: hsl(var(--color-success-hue), var(--color-success-sat), 20%);
    --color-success-subtle: hsla(var(--color-success-hue), var(--color-success-sat), 29%, 0.06);

    --color-danger: hsl(350, 89%, 43%);
    --color-danger-hover: hsl(350, 89%, 33%);
    --color-danger-subtle: hsla(350, 89%, 43%, 0.06);

    --color-warning: hsl(38, 92%, 50%);
    --color-warning-subtle: hsla(38, 92%, 50%, 0.08);

    --color-info: hsl(199, 89%, 48%);
    --color-info-subtle: hsla(199, 89%, 48%, 0.08);

    /* System Backgrounds - strictly off-white, no #fff */
    --bg-main: hsl(210, 40%, 96.1%); /* Soft gray-blue background */
    --bg-card: hsl(210, 40%, 98.5%); /* Off-white card background */
    --border-color: hsl(214, 32%, 89%);
    
    --text-primary: hsl(222, 47%, 12%);
    --text-secondary: hsl(215, 16%, 35%);
    --text-muted: hsl(215, 16%, 50%);

    /* Radii */
    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 14px;
    --radius-pill: 9999px;

    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.03);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.04), 0 2px 4px -1px rgba(0, 0, 0, 0.02);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.04), 0 4px 6px -2px rgba(0, 0, 0, 0.02);
    
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    --transition-fast: 0.15s ease;
    --transition-normal: 0.25s ease;
}

[data-bs-theme="dark"] {
    --bg-main: hsl(222, 47%, 6%);
    --bg-card: hsl(222, 47%, 9%);
    --border-color: hsl(217, 33%, 15%);
    
    --text-primary: hsl(210, 40%, 98%);
    --text-secondary: hsl(215, 20%, 80%);
    --text-muted: hsl(215, 16%, 60%);

    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.2);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.3), 0 2px 4px -1px rgba(0, 0, 0, 0.15);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.4), 0 4px 6px -2px rgba(0, 0, 0, 0.2);
    
    --color-primary: hsl(var(--color-primary-hue), var(--color-primary-sat), 60%);
    --color-primary-hover: hsl(var(--color-primary-hue), var(--color-primary-sat), 50%);
    --color-success: hsl(142, 60%, 45%);
    --color-success-hover: hsl(142, 60%, 35%);
}

body {
    font-family: var(--font-sans) !important;
    background-color: var(--bg-main) !important;
    color: var(--text-primary) !important;
}

/* Custom SVG icon classes */
.svg-icon {
    display: inline-block;
    width: 1em;
    height: 1em;
    stroke-width: 2;
    stroke: currentColor;
    fill: none;
    stroke-linecap: round;
    stroke-linejoin: round;
    vertical-align: middle;
}

.svg-icon-lg {
    width: 2.25rem;
    height: 2.25rem;
}

.svg-icon-md {
    width: 1.5rem;
    height: 1.5rem;
}

.svg-icon-sm {
    width: 1.1rem;
    height: 1.1rem;
}

.svg-icon-btn {
    margin-right: 0.5rem;
}

/* App Design System Component Classes */
.app-card {
    background-color: var(--bg-card) !important;
    border: 1px solid var(--border-color) !important;
    border-radius: var(--radius-md) !important;
    box-shadow: var(--shadow-sm) !important;
    overflow: hidden;
    transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}

.app-card:hover {
    box-shadow: var(--shadow-md) !important;
}

.app-card-header {
    background-color: var(--bg-main) !important;
    border-bottom: 1px solid var(--border-color) !important;
    padding: 1.25rem 1.5rem !important;
    font-weight: 600;
}

.app-hero {
    background: hsl(222, 47%, 10%) !important;
    color: hsl(210, 40%, 98%) !important;
    border-radius: var(--radius-lg) !important;
    border-left: 5px solid var(--color-primary) !important;
    padding: 2.5rem !important;
    position: relative;
    overflow: hidden;
    box-shadow: var(--shadow-md) !important;
}

.app-hero::before {
    content: '';
    position: absolute;
    inset: 0;
    background: radial-gradient(circle at 85% 15%, var(--color-primary-subtle) 0%, transparent 60%);
    pointer-events: none;
}

.app-list-item {
    background-color: var(--bg-main) !important;
    border: 1px solid var(--border-color) !important;
    border-radius: var(--radius-sm) !important;
    margin-bottom: 0.75rem;
    padding: 1rem 1.25rem;
    transition: background-color var(--transition-fast), border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.app-list-item:hover {
    background-color: var(--bg-card) !important;
    border-color: var(--color-primary-border) !important;
    box-shadow: var(--shadow-sm);
}

.app-btn {
    border-radius: var(--radius-sm) !important;
    font-weight: 500 !important;
    padding: 0.5rem 1.25rem !important;
    transition: all var(--transition-fast) !important;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border: 1px solid transparent;
}

.app-btn-lg {
    padding: 0.75rem 1.75rem !important;
    border-radius: var(--radius-md) !important;
}

.app-btn-sm {
    padding: 0.25rem 0.75rem !important;
    font-size: 0.875rem !important;
}

.app-btn-primary {
    background-color: var(--color-primary) !important;
    border-color: var(--color-primary) !important;
    color: var(--bg-card) !important;
}

.app-btn-primary:hover {
    background-color: var(--color-primary-hover) !important;
    border-color: var(--color-primary-hover) !important;
    color: var(--bg-card) !important;
}

.app-btn-success {
    background-color: var(--color-success) !important;
    border-color: var(--color-success) !important;
    color: var(--bg-card) !important;
}

.app-btn-success:hover {
    background-color: var(--color-success-hover) !important;
    border-color: var(--color-success-hover) !important;
    color: var(--bg-card) !important;
}

.app-btn-danger {
    background-color: var(--color-danger) !important;
    border-color: var(--color-danger) !important;
    color: var(--bg-card) !important;
}

.app-btn-danger:hover {
    background-color: var(--color-danger-hover) !important;
    border-color: var(--color-danger-hover) !important;
    color: var(--bg-card) !important;
}

.app-btn-outline {
    background-color: transparent !important;
    border: 1px solid var(--border-color) !important;
    color: var(--text-secondary) !important;
}

.app-btn-outline:hover {
    border-color: var(--color-primary-border) !important;
    color: var(--color-primary) !important;
    background-color: var(--color-primary-subtle) !important;
}

/* Theme adaptation for Bootstrap forms */
.form-control, .form-select {
    background-color: var(--bg-card) !important;
    border: 1px solid var(--border-color) !important;
    color: var(--text-primary) !important;
    border-radius: var(--radius-sm) !important;
    transition: border-color var(--transition-fast), box-shadow var(--transition-fast) !important;
}

.form-control:focus, .form-select:focus {
    border-color: var(--color-primary) !important;
    box-shadow: 0 0 0 3px var(--color-primary-border) !important;
    background-color: var(--bg-card) !important;
}

/* Theme adaptation for Bootstrap tables */
.table {
    --bs-table-bg: var(--bg-card) !important;
    --bs-table-striped-bg: var(--bg-main) !important;
    --bs-table-hover-bg: var(--color-primary-subtle) !important;
    --bs-table-color: var(--text-primary) !important;
    --bs-table-border-color: var(--border-color) !important;
    border-collapse: separate !important;
    border-spacing: 0 !important;
}

.table th {
    background-color: var(--bg-main) !important;
    color: var(--text-secondary) !important;
    font-weight: 600 !important;
    text-transform: uppercase !important;
    font-size: 0.75rem !important;
    letter-spacing: 0.05em !important;
    padding: 1rem 1.5rem !important;
    border-bottom: 2px solid var(--border-color) !important;
}

.table td {
    padding: 1rem 1.5rem !important;
    vertical-align: middle !important;
    border-bottom: 1px solid var(--border-color) !important;
}

.table tr:last-child td {
    border-bottom: 0 !important;
}


main > .container-fluid {
    padding: 70px 15px 20px;
    display: flex;
    flex-direction: column;
    min-height: 100%;
    max-width: 1680px;
    margin: 0 auto;
}

.not-set {
    color: var(--bs-danger);
    font-style: italic;
}

/* add sorting icons to gridview sort links */
a.asc:after, a.desc:after {
    content: '';
    left: 3px;
    display: inline-block;
    width: 0;
    height: 0;
    border: solid 5px transparent;
    margin: 4px 4px 2px 4px;
    background: transparent;
}

a.asc:after {
    border-bottom: solid 7px var(--bs-body-color);
    border-top-width: 0;
}

a.desc:after {
    border-top: solid 7px var(--bs-body-color);
    border-bottom-width: 0;
}

.grid-view th {
    white-space: nowrap;
}

.hint-block {
    display: block;
    margin-top: 5px;
    color: var(--bs-secondary-color);
}

.error-summary {
    color: var(--bs-danger-text-emphasis);
    background: var(--bs-danger-bg-subtle);
    border-left: 3px solid var(--bs-danger-border-subtle);
    padding: 10px 20px;
    margin: 0 0 15px 0;
}

/* align navbar brand baseline with nav links */
.navbar > .container,
.navbar > .container-fluid {
    align-items: baseline;
}

/* align the logout "link" (button in form) of the navbar */
.nav li > form > button.logout {
    color: var(--bs-navbar-color);
}

@media (max-width: 767.98px) {
    .navbar-nav .nav-link.logout {
        display: block;
        text-align: left;
        width: 100%;
        padding: 10px 0;
    }
}

.navbar-nav .nav-link.logout:focus,
.navbar-nav .nav-link.logout:hover {
    color: var(--bs-navbar-hover-color);
}

/* footer logo: light logo by default (light bg-body-tertiary), dark logo for dark theme */
.footer-logo-dark { display: none; }

[data-bs-theme="dark"] .footer-logo-light { display: none; }
[data-bs-theme="dark"] .footer-logo-dark  { display: inline-block; }

/* login inputs: seamless icon inside input (Volt style) */
.login-split-card .input-group {
    border: var(--bs-border-width) solid var(--bs-border-color);
    border-radius: var(--bs-border-radius);
    overflow: hidden;
    transition: border-color .15s ease-in-out, box-shadow .15s ease-in-out;
}

.login-split-card .input-group .input-group-text {
    background: transparent;
    border: 0;
    padding-left: 1rem;
    padding-right: .75rem;
    display: flex;
    align-items: center;
    justify-content: center;
}

.login-split-card .input-group .form-control {
    border: 0;
    background: transparent;
}

.login-split-card .input-group .form-control:focus {
    box-shadow: none;
}

.login-split-card .input-group:focus-within {
    border-color: var(--bs-primary);
    box-shadow: 0 0 0 .25rem rgba(var(--bs-primary-rgb), .25);
}

/* validation styles for login split card (browsers with :has()) */
@supports selector(.input-group:has(.is-invalid)) {
    .login-split-card .input-group:has(.is-invalid) ~ .invalid-feedback {
        display: block;
        margin-top: .35rem;
        margin-bottom: .5rem;
    }

    .login-split-card .input-group:has(.is-invalid) {
        border-color: var(--bs-danger);
    }

    .login-split-card .input-group:has(.is-invalid):focus-within {
        box-shadow: 0 0 0 .25rem rgba(var(--bs-danger-rgb), .25);
    }
}

/* fallback validation styles for login split card (browsers without :has()) */
@supports not selector(.input-group:has(.is-invalid)) {
    .login-split-card .invalid-feedback:not(:empty) {
        display: block;
        margin-top: .35rem;
        margin-bottom: .5rem;
    }

    .login-split-card .input-group .form-control.is-invalid {
        border: var(--bs-border-width) solid var(--bs-danger);
    }

    .login-split-card .input-group .form-control.is-invalid:focus {
        box-shadow: 0 0 0 .25rem rgba(var(--bs-danger-rgb), .25);
    }
}

/* login split card */
.login-split-card {
    border-radius: 1rem;
    box-shadow: 0 4px 24px rgba(0, 0, 0, .10);
    background-color: var(--bs-gray-100);
    width: 100%;
    max-width: 900px;
}

.login-split-card-wide {
    max-width: 960px;
}

.login-brand-title {
    font-size: 1.75rem;
    line-height: 1.3;
}

.login-brand-text {
    font-size: .9rem;
}

.login-brand-panel {
    background: #0f172a;
    color: #f8fafc;
    position: relative;
    min-height: 480px;
    border-right: 1px solid #1e293b;
}

.login-brand-panel::before {
    content: '';
    position: absolute;
    inset: 0;
    background: radial-gradient(circle at 80% 20%, rgba(37, 99, 235, 0.15) 0%, transparent 50%);
    pointer-events: none;
}

.login-btn {
    background: #2563eb;
    color: #f1f5f9;
    border: none;
    font-weight: 600;
    letter-spacing: .02em;
    transition: background-color .2s, transform .1s;
}

.login-btn:hover {
    background: #1d4ed8;
    color: #f1f5f9;
    transform: translateY(-1px);
}

.login-btn:active {
    transform: translateY(0);
}

/* dark mode login card */
[data-bs-theme="dark"] .login-split-card {
    background-color: var(--bs-body-bg);
    box-shadow: 0 0 0 1px var(--bs-border-color), 0 4px 24px rgba(0, 0, 0, .4);
}

[data-bs-theme="dark"] .login-mobile-logo {
    filter: invert(1);
}

/* contact form textarea height */
.site-contact textarea.form-control {
    height: 140px;
}

/* captcha: blend with card background */
.site-contact img[src*="captcha"] {
    border-radius: var(--bs-border-radius);
    mix-blend-mode: multiply;
}

/* dark mode: invert captcha for visibility on dark background */
[data-bs-theme="dark"] .site-contact img[src*="captcha"] {
    mix-blend-mode: screen;
    filter: invert(1) hue-rotate(180deg);
}

/* centered page layout */
.site-login,
.site-contact,
.site-index,
.site-error,
.site-about,
.site-contact-success {
    flex: 1;
}

.site-error .site-error-content,
.site-about .site-about-content,
.site-contact-success .site-contact-success-content {
    width: 100%;
    max-width: 90%;
}

@media (min-width: 576px) {
    .site-error .site-error-content,
    .site-about .site-about-content,
    .site-contact-success .site-contact-success-content {
        max-width: 80%;
    }
}

@media (min-width: 768px) {
    .site-error .site-error-content,
    .site-about .site-about-content,
    .site-contact-success .site-contact-success-content {
        max-width: 60%;
    }
}

@media (min-width: 992px) {
    .site-error .site-error-content,
    .site-about .site-about-content,
    .site-contact-success .site-contact-success-content {
        max-width: 50%;
    }
}

/* hero banner */
.hero-banner {
    background: #0f172a;
    border-left: 5px solid #2563eb;
    position: relative;
}

.hero-lead {
    max-width: 520px;
}

.hero-logo {
    height: 120px;
    opacity: .45;
    right: 2.5rem;
    top: 50%;
    transform: translateY(-50%);
}

.hero-banner::before {
    content: '';
    position: absolute;
    inset: 0;
    border-radius: inherit;
    background: radial-gradient(circle at 85% 15%, rgba(37, 99, 235, 0.1) 0%, transparent 50%);
    pointer-events: none;
}

/* extension cards */
.extension-card {
    transition: transform .15s ease-in-out, box-shadow .15s ease-in-out;
}

.extension-card:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 24px rgba(0, 0, 0, .12) !important;
}

.extension-icon {
    font-size: 1.5rem;
    line-height: 1;
}

/* dark mode: extension cards */
[data-bs-theme="dark"] .extension-card {
    background-color: var(--bs-body-bg);
    box-shadow: 0 0 0 1px var(--border-color), 0 2px 8px rgba(0, 0, 0, .3);
}

[data-bs-theme="dark"] .extension-card:hover {
    box-shadow: 0 0 0 1px var(--border-color), 0 8px 24px rgba(0, 0, 0, .4) !important;
}

/* Custom Premium Tabs */
.grant-project-settings .nav-tabs {
    border-bottom: 1px solid var(--border-color) !important;
    background-color: var(--bg-card) !important;
}

.grant-project-settings .nav-tabs .nav-link {
    background: transparent !important;
    border: none !important;
    color: var(--text-secondary) !important;
    border-bottom: 2px solid transparent !important;
    padding: 1.15rem 1.5rem !important;
    transition: all var(--transition-fast) !important;
}



/* Custom Premium Tabs */
.grant-project-settings .nav-tabs {
    border-bottom: 1px solid var(--border-color) !important;
    background-color: var(--bg-card) !important;
}

.grant-project-settings .nav-tabs .nav-link {
    background: transparent !important;
    border: none !important;
    color: var(--text-secondary) !important;
    border-bottom: 2px solid transparent !important;
    padding: 1.15rem 1.5rem !important;
    transition: all var(--transition-fast) !important;
}

.grant-project-settings .nav-tabs .nav-link:hover {
    color: var(--color-primary) !important;
    border-bottom-color: var(--color-primary-border) !important;
}

.grant-project-settings .nav-tabs .nav-link.active {
    color: var(--color-primary) !important;
    border-bottom: 2px solid var(--color-primary) !important;
    font-weight: 600 !important;
}

.app-card-footer {
    background-color: var(--bg-main) !important;
    border-top: 1px solid var(--border-color) !important;
    padding: 1.25rem 1.5rem !important;
    margin: 1.5rem -1.5rem -1.5rem -1.5rem !important;
    display: flex;
    gap: 0.5rem;
}

.sources-scroll-container {
    max-height: 250px;
    overflow-y: auto;
    border: 1px solid var(--border-color);
    padding: 0.75rem 1rem;
    border-radius: var(--radius-sm);
    background-color: var(--bg-card);
}

/* Yii2 & Bootstrap 5 validation styling overrides */
.is-invalid,
.has-error .form-control,
.form-control.is-invalid {
    border-color: var(--color-danger) !important;
    background-color: var(--color-danger-subtle) !important;
}
.is-invalid:focus,
.has-error .form-control:focus,
.form-control.is-invalid:focus {
    box-shadow: 0 0 0 0.25rem var(--color-danger-subtle) !important;
    border-color: var(--color-danger) !important;
}
.invalid-feedback,
.help-block-error {
    display: block !important;
    color: var(--color-danger) !important;
    font-size: 0.825rem !important;
    margin-top: 0.25rem !important;
    font-weight: 500 !important;
}
.has-success .form-control {
    border-color: var(--color-success) !important;
}