/* ================================================================================================
   🎨 YnFred Design Tokens (CSS Variables)
   Color palette derived from the YnFred logo:
   Gold ring (#DAB95B), Deep Teal body (#003B46), Dark Cyan (#07575B), Blue accent (#1D4ED8)
   ================================================================================================ */

:root {
    /* ── Primary Palette (from logo) ── */
    --ynfred-primary: #DAB95B;
    --ynfred-primary-dark: #003B46;
    --ynfred-primary-light: #E8D8A0;
    --ynfred-primary-lighter: #FFF8E7;
    /* ── Secondary ── */
    --ynfred-secondary: #07575B;
    /* ── Blue Palette (#1D4ED8 family) ── */
    --ynfred-blue: #1D4ED8;
    --ynfred-blue-dark: #1E3A8A;
    --ynfred-blue-light: #DBEAFE;
    --ynfred-blue-lighter: #EFF6FF;
    --ynfred-blue-muted: #3B82F6;
    /* ── Backgrounds ── */
    --ynfred-bg-main: #F0F2F5;
    --ynfred-bg-paper: #FFFFFF;
    --ynfred-bg-hover: rgba(29, 78, 216, 0.06);
    --ynfred-bg-active: rgba(29, 78, 216, 0.12);
    --ynfred-bg-disabled: #E0E0E0;
    /* ── Text ── */
    --ynfred-text-primary: #1E3A5F;
    --ynfred-text-secondary: #64748B;
    --ynfred-text-disabled: #9E9E9E;
    --ynfred-text-white: #FFFFFF;
    /* ── Borders ── */
    --ynfred-border-color: #E2E8F0;
    --ynfred-border-width: 1px;
    --ynfred-border-width-thick: 2px;
    /* ── Semantic / Status ── */
    --ynfred-success: #4CAF50;
    --ynfred-info: #2196F3;
    --ynfred-warning: #FF9800;
    --ynfred-error: #F44336;
    /* ── Typography ── */
    --ynfred-font-primary: 'Lexend', sans-serif;
    --ynfred-font-xs: 0.75rem;
    --ynfred-font-sm: 0.875rem;
    --ynfred-font-base: 1rem;
    --ynfred-font-lg: 1.125rem;
    --ynfred-font-xl: 1.25rem;
    --ynfred-font-2xl: 1.5rem;
    --ynfred-font-3xl: 2rem;
    --ynfred-font-normal: 400;
    --ynfred-font-medium: 500;
    --ynfred-font-semibold: 600;
    --ynfred-font-bold: 700;
    --ynfred-leading-tight: 1.2;
    --ynfred-leading-normal: 1.5;
    /* ── Spacing ── */
    --ynfred-spacing-xs: 0.25rem;
    --ynfred-spacing-sm: 0.5rem;
    --ynfred-spacing-md: 1rem;
    --ynfred-spacing-lg: 1.5rem;
    --ynfred-spacing-xl: 2rem;
    /* ── Border Radius ── */
    --ynfred-radius-sm: 8px;
    --ynfred-radius-md: 12px;
    --ynfred-radius-lg: 16px;
    --ynfred-radius-xl: 24px;
    /* ── Shadows ── */
    --ynfred-shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.08);
    --ynfred-shadow-md: 0 4px 12px rgba(0, 0, 0, 0.1);
    --ynfred-shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.12);
    --ynfred-shadow-xl: 0 12px 40px rgba(0, 0, 0, 0.16);
    /* ── Transitions ── */
    --ynfred-transition: 0.3s ease;
    --ynfred-transition-fast: 0.15s ease;
    /* ── Z-Index ── */
    --ynfred-z-modal: 1300;
    --ynfred-z-dropdown: 1200;
}

/* ================================================================================================
   🔒 GLOBAL Logo Constraint in AppBar
   ================================================================================================ */

.ynfred-appbar .ynfred-logo-button {
    height: 56px !important;
    max-height: 56px !important;
    padding: 4px !important;
    overflow: hidden !important;
}

    .ynfred-appbar .ynfred-logo,
    .ynfred-appbar .ynfred-logo-button img {
        height: 44px !important;
        width: 44px !important;
        max-height: 44px !important;
        max-width: 44px !important;
        min-height: 0 !important;
        min-width: 0 !important;
        object-fit: contain !important;
        border-radius: var(--ynfred-radius-sm) !important;
        display: block !important;
        background: transparent !important;
        box-shadow: none !important;
        animation: none !important;
    }

/* ================================================================================================
   🎨 MudBlazor Component Color Overrides — Unified Blue
   ================================================================================================ */

/* PRIMARY BUTTONS */
.mud-button-filled-primary,
.mud-button-root.mud-button-filled.mud-button-filled-primary {
    background-color: var(--ynfred-blue) !important;
    color: var(--ynfred-text-white) !important;
    font-weight: var(--ynfred-font-semibold) !important;
    border-radius: var(--ynfred-radius-md);
    transition: var(--ynfred-transition);
}

    .mud-button-filled-primary:hover {
        background-color: var(--ynfred-blue-muted) !important;
        box-shadow: var(--ynfred-shadow-md);
        transform: translateY(-1px);
    }

    .mud-button-filled-primary:active {
        transform: translateY(0);
    }

/* OUTLINED BUTTONS */
.mud-button-outlined-primary {
    border-color: var(--ynfred-blue) !important;
    color: var(--ynfred-blue) !important;
    font-weight: var(--ynfred-font-medium) !important;
}

    .mud-button-outlined-primary:hover {
        background-color: var(--ynfred-bg-hover) !important;
        border-color: var(--ynfred-blue-dark) !important;
    }

/* TEXT BUTTONS */
.mud-button-text-primary {
    color: var(--ynfred-blue) !important;
    font-weight: var(--ynfred-font-medium) !important;
}

    .mud-button-text-primary:hover {
        background-color: var(--ynfred-bg-hover) !important;
    }

/* PROGRESS INDICATORS */
.mud-progress-circular.mud-primary svg circle {
    stroke: var(--ynfred-blue) !important;
}

.mud-progress-linear.mud-primary .mud-progress-linear-bar {
    background-color: var(--ynfred-blue) !important;
}

/* CHIPS */
.mud-chip.mud-chip-color-primary {
    background-color: var(--ynfred-blue) !important;
    color: var(--ynfred-text-white) !important;
    font-weight: var(--ynfred-font-medium) !important;
}

/* ICONS */
.mud-icon-root.mud-primary-text {
    color: var(--ynfred-blue) !important;
}

/* TYPOGRAPHY */
.mud-typography.mud-primary-text {
    color: var(--ynfred-blue-dark) !important;
}

/* AVATAR */
.mud-avatar.ynfred-avatar,
.mud-appbar .mud-avatar {
    background: rgba(255, 255, 255, 0.15) !important;
    color: var(--ynfred-text-white) !important;
    box-shadow: var(--ynfred-shadow-sm);
    border: 1px solid rgba(255, 255, 255, 0.25) !important;
}

/* APPBAR — Blue Gradient */
.mud-appbar.ynfred-appbar {
    background: linear-gradient(90deg, var(--ynfred-blue-dark) 0%, var(--ynfred-blue) 100%) !important;
    color: var(--ynfred-text-white) !important;
    box-shadow: 0 4px 16px rgba(29, 78, 216, 0.2) !important;
}

/* DRAWER */
.mud-drawer.ynfred-drawer {
    background-color: var(--ynfred-bg-paper) !important;
    border-right: var(--ynfred-border-width) solid var(--ynfred-border-color) !important;
}

/* PAPER/CARDS */
.mud-paper {
    background-color: var(--ynfred-bg-paper) !important;
}

/* SWITCH */
.mud-switch.mud-checked .mud-switch-thumb {
    background-color: var(--ynfred-blue) !important;
}

.mud-switch.mud-checked .mud-switch-track {
    background-color: var(--ynfred-blue-light) !important;
}

/* MENU ITEMS */
.mud-menu .mud-list-item:hover,
.mud-list-item:hover {
    background-color: var(--ynfred-bg-hover) !important;
}

.mud-menu .mud-list-item:active,
.mud-list-item:active {
    background-color: var(--ynfred-bg-active) !important;
}

/* INPUT FOCUS */
.mud-input-root.mud-input-focused:not(.mud-disabled) .mud-input-slot::before {
    border-color: var(--ynfred-blue) !important;
}

.mud-input-label.mud-focused {
    color: var(--ynfred-blue) !important;
}

/* EXPANSION PANEL */
.mud-expand-panel {
    background-color: var(--ynfred-bg-paper) !important;
    border: var(--ynfred-border-width) solid var(--ynfred-border-color) !important;
    border-radius: var(--ynfred-radius-md) !important;
    margin-bottom: var(--ynfred-spacing-md);
}

.mud-expand-panel-header {
    background-color: var(--ynfred-blue-lighter) !important;
    transition: var(--ynfred-transition);
}

    .mud-expand-panel-header:hover {
        background-color: var(--ynfred-blue-light) !important;
    }

/* SKELETON */
.mud-skeleton {
    background-color: var(--ynfred-blue-light) !important;
}

/* SNACKBAR */
.mud-snackbar.mud-snackbar-severity-success {
    background-color: var(--ynfred-success) !important;
}

.mud-snackbar.mud-snackbar-severity-info {
    background-color: var(--ynfred-info) !important;
}

.mud-snackbar.mud-snackbar-severity-warning {
    background-color: var(--ynfred-warning) !important;
}

.mud-snackbar.mud-snackbar-severity-error {
    background-color: var(--ynfred-error) !important;
}

/* TABLE */
.mud-table {
    background-color: var(--ynfred-bg-paper) !important;
}

.mud-table-head {
    background-color: var(--ynfred-blue-light) !important;
}

.mud-table-row:hover {
    background-color: var(--ynfred-blue-lighter) !important;
}

/* DIALOG */
.mud-dialog {
    background-color: var(--ynfred-bg-paper) !important;
}

.mud-dialog-title {
    color: var(--ynfred-blue-dark) !important;
    font-weight: var(--ynfred-font-bold) !important;
}

/* TABS */
.mud-tabs .mud-tab-active {
    color: var(--ynfred-blue) !important;
    font-weight: var(--ynfred-font-semibold) !important;
}

.mud-tabs .mud-tabs-toolbar {
    border-bottom: var(--ynfred-border-width-thick) solid var(--ynfred-border-color) !important;
}

/* BADGE */
.mud-badge.mud-badge-primary {
    background-color: var(--ynfred-blue) !important;
    color: var(--ynfred-text-white) !important;
}

/* ================================================================================================
   📅 MudDatePicker — TWO TONE: Blue + White ONLY
   Same blue everywhere — header, month row, selected date
   ================================================================================================ */

.mud-picker,
.ynfred-datepicker {
    --mud-palette-primary: #1D4ED8;
    --mud-palette-primary-text: #FFFFFF;
    --mud-palette-primary-hover: #1D4ED8;
    --mud-palette-primary-darken: #1D4ED8;
}

    /* Header panel (left side) — solid blue */
    .mud-picker-calendar-header,
    .mud-picker .mud-picker-calendar-header {
        background: var(--ynfred-blue) !important;
        color: var(--ynfred-text-white) !important;
    }

        .mud-picker-calendar-header .mud-button-root,
        .mud-picker-calendar-header .mud-typography,
        .mud-picker-calendar-header .mud-icon-root {
            color: var(--ynfred-text-white) !important;
        }

/* Month/year switch row — SAME BLUE (not white) */
.mud-picker-calendar-header-switch {
    background: var(--ynfred-blue) !important;
}

    .mud-picker-calendar-header-switch .mud-button-root,
    .mud-picker-calendar-header-switch .mud-typography {
        color: var(--ynfred-text-white) !important;
    }

    /* Arrow navigation buttons — TRANSPARENT background so white icons are visible */
    .mud-picker-calendar-header-switch .mud-icon-button {
        background: transparent !important;
        background-color: transparent !important;
        box-shadow: none !important;
        border: none !important;
        color: var(--ynfred-text-white) !important;
        border-radius: 50% !important;
        transition: background 0.2s ease !important;
    }

        .mud-picker-calendar-header-switch .mud-icon-button:hover {
            background: rgba(255, 255, 255, 0.15) !important;
        }

        .mud-picker-calendar-header-switch .mud-icon-button:active {
            background: rgba(255, 255, 255, 0.25) !important;
        }

        /* Force SVG arrow icons to be white */
        .mud-picker-calendar-header-switch .mud-icon-button .mud-icon-root,
        .mud-picker-calendar-header-switch .mud-icon-button svg {
            color: var(--ynfred-text-white) !important;
            fill: currentColor !important;
        }
/* Day-of-week header row — blue background for continuity */
.mud-picker-calendar-day-label,
.mud-picker-calendar .mud-picker-calendar-day-label {
    color: var(--ynfred-text-white) !important;
}

/* Week day labels container */
.mud-picker-calendar-header-day {
    background: var(--ynfred-blue) !important;
    color: var(--ynfred-text-white) !important;
}

    .mud-picker-calendar-header-day .mud-typography {
        color: var(--ynfred-text-white) !important;
    }

/* Calendar body — white */
.mud-picker-calendar-content,
.mud-picker-calendar {
    background: var(--ynfred-bg-paper) !important;
}

/* Day numbers — dark text */
.mud-picker-calendar-day .mud-button-root {
    color: var(--ynfred-text-primary) !important;
    background: transparent !important;
}

    .mud-picker-calendar-day .mud-button-root:hover {
        background-color: var(--ynfred-blue-light) !important;
    }

/* Selected date — blue circle */
.mud-picker .mud-selected > .mud-button-root,
.mud-picker button.mud-button-root.mud-button-filled,
.mud-picker-calendar-day .mud-selected .mud-button-root,
.mud-picker .mud-button-root.mud-button-filled.mud-button-filled-primary {
    background-color: var(--ynfred-blue) !important;
    color: var(--ynfred-text-white) !important;
}

/* Today indicator */
.mud-picker-calendar-day .mud-current > .mud-button-root,
.mud-picker .mud-current > .mud-button-root {
    color: var(--ynfred-blue) !important;
    border-color: var(--ynfred-blue) !important;
}

/* Year picker */
.mud-picker-year-container .mud-button-root.mud-button-filled {
    background-color: var(--ynfred-blue) !important;
    color: var(--ynfred-text-white) !important;
}

/* ================================================================================================
   🧭 Drawer & NavMenu — FORCE TOP ALIGNMENT
   ================================================================================================ */

.mud-drawer-content {
    display: flex !important;
    flex-direction: column !important;
    justify-content: flex-start !important;
    align-items: stretch !important;
}

.mud-navmenu {
    flex: 0 1 auto !important;
}

.ynfred-drawer-nav-wrapper {
    display: flex;
    flex-direction: column;
    align-items: stretch;
    flex: 0 1 auto !important;
    width: 100%;
}

.ynfred-drawer-header {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 16px 20px 12px;
    flex-shrink: 0;
}

.ynfred-drawer-logo {
    width: 36px;
    height: 36px;
    object-fit: contain;
    border-radius: var(--ynfred-radius-sm);
}

.ynfred-drawer-brand {
    font-family: var(--ynfred-font-primary);
    font-weight: var(--ynfred-font-bold);
    font-size: var(--ynfred-font-lg);
    color: var(--ynfred-blue-dark);
    letter-spacing: -0.02em;
}

.ynfred-nav-menu {
    padding: 8px 12px !important;
    margin-top: 0 !important;
    flex: 0 1 auto !important;
}

    .ynfred-nav-menu .mud-nav-link {
        border-radius: var(--ynfred-radius-sm) !important;
        margin-bottom: 4px !important;
        padding: 10px 16px !important;
        font-weight: var(--ynfred-font-medium) !important;
        color: var(--ynfred-text-primary) !important;
        transition: all 0.2s ease !important;
        border-left: 3px solid transparent !important;
    }

        .ynfred-nav-menu .mud-nav-link:hover {
            background-color: var(--ynfred-blue-lighter) !important;
            color: var(--ynfred-blue) !important;
            border-left-color: var(--ynfred-blue-light) !important;
        }

        .ynfred-nav-menu .mud-nav-link.active,
        .ynfred-nav-menu .mud-nav-link-active {
            background-color: var(--ynfred-blue-light) !important;
            color: var(--ynfred-blue) !important;
            font-weight: var(--ynfred-font-semibold) !important;
            border-left-color: var(--ynfred-blue) !important;
        }

        .ynfred-nav-menu .mud-nav-link .mud-nav-link-icon,
        .ynfred-nav-menu .mud-nav-link .mud-icon-root {
            color: inherit !important;
            margin-right: 12px !important;
        }

/* ================================================================================================
   📊 Dashboard Styles
   ================================================================================================ */

.ynfred-dashboard-root {
    background: transparent;
    min-height: 100vh;
    padding: 0;
}

.dashboard-loading {
    background: var(--ynfred-blue-lighter);
}

.ynfred-welcome-text {
    color: var(--ynfred-text-primary) !important;
    font-weight: var(--ynfred-font-bold) !important;
}

.ynfred-subtitle {
    color: var(--ynfred-text-secondary) !important;
    font-weight: var(--ynfred-font-normal) !important;
}

/* Section Headers with Blue Underline */
.ynfred-dashboard-root .ynfred-welcome-text {
    color: var(--ynfred-blue-dark) !important;
    font-weight: var(--ynfred-font-bold) !important;
    position: relative;
    padding-bottom: var(--ynfred-spacing-sm);
}

    .ynfred-dashboard-root .ynfred-welcome-text::after {
        content: '';
        position: absolute;
        bottom: 0;
        left: 0;
        width: 50px;
        height: 3px;
        background: var(--ynfred-blue);
        border-radius: 2px;
    }

/* ── Course Cards ── */
.ynfred-course-card {
    border-radius: var(--ynfred-radius-md) !important;
    border: 2px solid var(--ynfred-border-color) !important;
    box-shadow: var(--ynfred-shadow-sm) !important;
    transition: all 0.25s ease !important;
    background: var(--ynfred-bg-paper) !important;
}

    .ynfred-course-card:hover {
        border-color: var(--ynfred-blue) !important;
        box-shadow: 0 6px 20px rgba(29, 78, 216, 0.12) !important;
        transform: translateY(-3px) !important;
    }

.ynfred-course-card--active {
    border-color: var(--ynfred-blue) !important;
    background: var(--ynfred-blue-light) !important;
    box-shadow: 0 4px 16px rgba(29, 78, 216, 0.18) !important;
}

    .ynfred-course-card--active:hover {
        transform: translateY(-1px) !important;
    }

.ynfred-course-icon {
    background: var(--ynfred-blue-lighter) !important;
    color: var(--ynfred-blue) !important;
    border: 1px solid var(--ynfred-blue-light) !important;
}

.ynfred-course-icon--active {
    background: var(--ynfred-blue) !important;
    color: var(--ynfred-text-white) !important;
    border-color: var(--ynfred-blue) !important;
}

/* ── Main Course Panel (merged Skills + Materials) ── */
.ynfred-main-panel {
    border-radius: var(--ynfred-radius-md) !important;
    border: var(--ynfred-border-width) solid var(--ynfred-border-color) !important;
    overflow: hidden;
    background: var(--ynfred-bg-paper) !important;
}

.ynfred-panel-header {
    background: linear-gradient(135deg, var(--ynfred-blue-dark) 0%, var(--ynfred-blue) 100%);
    color: var(--ynfred-text-white);
}

/* Lesson items — clickable rows */
.ynfred-lesson-item {
    cursor: pointer !important;
    border-radius: var(--ynfred-radius-sm) !important;
    transition: var(--ynfred-transition-fast) !important;
}

    .ynfred-lesson-item:hover {
        background-color: var(--ynfred-blue-lighter) !important;
    }

/* CONTENT CARDS */
.ynfred-content-card {
    background: var(--ynfred-bg-paper) !important;
    border-radius: var(--ynfred-radius-md);
    box-shadow: var(--ynfred-shadow-sm);
    border: var(--ynfred-border-width) solid var(--ynfred-border-color);
    border-left: 4px solid var(--ynfred-blue) !important;
    transition: var(--ynfred-transition);
}

    .ynfred-content-card:hover {
        box-shadow: var(--ynfred-shadow-md);
        transform: translateY(-2px);
    }

/* Schedule Card */
.ynfred-schedule-card {
    background: var(--ynfred-bg-paper) !important;
    border-radius: var(--ynfred-radius-md) !important;
    border: var(--ynfred-border-width) solid var(--ynfred-border-color) !important;
    overflow: hidden;
    box-shadow: var(--ynfred-shadow-sm) !important;
}

/* SKILL CARDS */
.ynfred-skill-card {
    background: var(--ynfred-blue-lighter) !important;
    border-radius: var(--ynfred-radius-sm);
    border: var(--ynfred-border-width) solid #D6E4F0;
    transition: var(--ynfred-transition);
    padding: var(--ynfred-spacing-md);
}

    .ynfred-skill-card:hover {
        background: var(--ynfred-blue-light) !important;
        border-color: var(--ynfred-blue);
        box-shadow: var(--ynfred-shadow-sm);
        transform: translateY(-2px);
    }

/* EMPTY STATE CARD */
.ynfred-empty-state-card {
    background: var(--ynfred-blue-lighter);
    border: var(--ynfred-border-width-thick) dashed var(--ynfred-blue) !important;
    border-radius: var(--ynfred-radius-lg);
}

/* TOPIC PANEL */
.ynfred-topic-panel {
    border-left: 3px solid var(--ynfred-blue) !important;
    transition: var(--ynfred-transition);
}

    .ynfred-topic-panel:hover {
        background: var(--ynfred-blue-lighter) !important;
        box-shadow: var(--ynfred-shadow-sm);
    }

/* ================================================================================================
   🎯 Utility Classes
   ================================================================================================ */

.rounded-sm {
    border-radius: var(--ynfred-radius-sm) !important;
}

.rounded-md {
    border-radius: var(--ynfred-radius-md) !important;
}

.rounded-lg {
    border-radius: var(--ynfred-radius-lg) !important;
}

.rounded-xl {
    border-radius: var(--ynfred-radius-xl) !important;
}

.shadow-sm {
    box-shadow: var(--ynfred-shadow-sm) !important;
}

.shadow-md {
    box-shadow: var(--ynfred-shadow-md) !important;
}

.shadow-lg {
    box-shadow: var(--ynfred-shadow-lg) !important;
}

.shadow-xl {
    box-shadow: var(--ynfred-shadow-xl) !important;
}

*:focus-visible {
    outline: 2px solid var(--ynfred-blue) !important;
    outline-offset: 2px;
}

@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation-duration: 0.01ms !important;
        transition-duration: 0.01ms !important;
    }
}