/**
 * TypePOT Web Application — Primary CSS (Single Source of Truth)
 * Minimalist Swiss / Modern Mac Typography Aesthetic
 *
 * Palette Rules:
 * - Canvas Background: #FFFFFF (Pure White)
 * - Secondary Color: #F4F4F5 (Light Gray)
 * - Borders: #E5E5E5 (Hairline Border)
 * - Typography: Inter (Sans), Newsreader (Serif), JetBrains Mono (Mono)
 * - Buttons: Default #1D1D1F (Black) -> Hover #F15A24 (TypePOT Orange)
 */

:root {
    /* Color Palette Tokens */
    --tp-canvas: #FFFFFF;
    --tp-surface: #FFFFFF;
    --tp-secondary: #F4F4F5;
    --tp-secondary-hover: #EAEAEA;
    --tp-border: #E5E5E5;
    --tp-border-strong: #1D1D1F;
    
    /* Text Tokens */
    --tp-text-primary: #1D1D1F;
    --tp-text-secondary: #6E6E73;
    --tp-text-muted: #8E8E93;
    
    /* Brand Accent Tokens */
    --tp-orange: #F15A24;
    --tp-orange-hover: #D94B1A;
    --tp-orange-light: #FFF3EE;
    
    /* Button Global Tokens (Default: Black, Hover: Orange) */
    --tp-btn-bg: #1D1D1F;
    --tp-btn-color: #FFFFFF;
    --tp-btn-border: #1D1D1F;
    --tp-btn-hover-bg: #F15A24;
    --tp-btn-hover-color: #FFFFFF;
    --tp-btn-hover-border: #F15A24;
    --tp-btn-active-bg: #D94B1A;
    --tp-btn-active-border: #D94B1A;

    /* Transitions & Radii */
    --tp-radius-sm: 6px;
    --tp-radius-md: 8px;
    --tp-radius-lg: 12px;
    --tp-radius-xl: 16px;
    --tp-transition: all 0.2s cubic-bezier(0.16, 1, 0.3, 1);
}

/* ==========================================================================
   Base Styles
   ========================================================================== */

html, body {
    background-color: var(--tp-canvas);
    color: var(--tp-text-primary);
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* Selection Highlight */
::selection {
    background-color: rgba(241, 90, 36, 0.18);
    color: var(--tp-orange);
}

/* ==========================================================================
   Button System (Single Source of Truth)
   Rule: Default Black (#1D1D1F), Hover Orange (#F15A24)
   ========================================================================== */

.tp-btn,
.tp-btn-primary {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    background-color: var(--tp-btn-bg) !important;
    color: var(--tp-btn-color) !important;
    border: 1px solid var(--tp-btn-border) !important;
    border-radius: var(--tp-radius-md);
    font-weight: 600;
    line-height: 1.25;
    text-align: center;
    text-decoration: none;
    cursor: pointer;
    box-shadow: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    transition: var(--tp-transition);
    user-select: none;
}

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

.tp-btn:active,
.tp-btn-primary:active {
    background-color: var(--tp-btn-active-bg) !important;
    border-color: var(--tp-btn-active-border) !important;
}

/* Button Size Modifiers */
.tp-btn-sm {
    height: 32px;
    padding: 0 0.75rem;
    font-size: 11px;
    letter-spacing: 0.03em;
}

.tp-btn-md {
    height: 38px;
    padding: 0 1.125rem;
    font-size: 12px;
}

.tp-btn-lg {
    height: 46px;
    padding: 0 1.75rem;
    font-size: 13px;
    letter-spacing: 0.02em;
}

.tp-btn-block {
    width: 100%;
}

/* ==========================================================================
   Sections & Layout
   ========================================================================== */

/* Pure White Canvas Section */
.tp-section-canvas {
    background-color: var(--tp-canvas);
}

/* Secondary Light Gray Section with Hairline Borders */
.tp-section-secondary {
    background-color: var(--tp-secondary);
    border-top: 1px solid var(--tp-border);
    border-bottom: 1px solid var(--tp-border);
}

/* Header & Announcement */
.tp-announcement {
    background-color: var(--tp-secondary);
    border-bottom: 1px solid var(--tp-border);
    color: var(--tp-text-primary);
}

.tp-header {
    background-color: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--tp-border);
}

/* Footer */
.tp-footer {
    background-color: var(--tp-secondary);
    border-top: 1px solid var(--tp-border);
}

/* ==========================================================================
   Cards & Surfaces
   ========================================================================== */

.tp-card {
    background-color: var(--tp-surface);
    border: 1px solid var(--tp-border);
    border-radius: var(--tp-radius-lg);
    box-shadow: 0 1px 2px 0 rgba(0, 0, 0, 0.03);
    transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.tp-card:hover {
    border-color: var(--tp-border-strong);
}

.tp-card-secondary {
    background-color: var(--tp-secondary);
    border: 1px solid var(--tp-border);
    border-radius: var(--tp-radius-lg);
}

/* Pills, Badges & Micro Tags */
.tp-pill {
    display: inline-flex;
    align-items: center;
    gap: 0.375rem;
    padding: 0.25rem 0.625rem;
    background-color: var(--tp-secondary);
    border: 1px solid var(--tp-border);
    border-radius: var(--tp-radius-sm);
    font-family: 'JetBrains Mono', monospace;
    font-size: 11px;
    font-weight: 600;
    color: var(--tp-text-secondary);
    letter-spacing: 0.02em;
}

.tp-pill-white {
    background-color: #FFFFFF;
    border-color: var(--tp-border);
    color: var(--tp-text-primary);
}

.tp-badge-orange {
    background-color: var(--tp-orange);
    color: #FFFFFF;
}

/* ==========================================================================
   Inputs & Form Controls
   ========================================================================== */

.tp-input {
    width: 100%;
    background-color: var(--tp-secondary);
    border: 1px solid var(--tp-border);
    border-radius: var(--tp-radius-md);
    padding: 0.625rem 0.875rem;
    font-size: 13px;
    color: var(--tp-text-primary);
    outline: none;
    transition: var(--tp-transition);
}

.tp-input:focus {
    background-color: #FFFFFF;
    border-color: var(--tp-text-primary);
    box-shadow: 0 0 0 1px var(--tp-text-primary);
}

.tp-input::placeholder {
    color: var(--tp-text-muted);
}