/* ==========================================================================
   MERA PDF — BRAND IDENTITY & DESIGN SYSTEM
   Tagline: "Your PDF, Your Way."
   Palette: Primary Red (#E53935), Dark Red (#B71C1C), Dark (#0F172A),
            Gray (#6B7280), Light Gray (#E5E7EB), White (#FFFFFF)
   Typography: Poppins (Google Fonts)
   ========================================================================== */

:root {
    /* Brand Color Palette */
    --primary: #E53935;
    --primary-hover: #B71C1C;
    --primary-light: #FEF2F2;
    --primary-border: #FCA5A5;
    --primary-glow: rgba(229, 57, 53, 0.25);

    /* Neutral & Dark Shades */
    --dark: #0F172A;
    --dark-hover: #1E293B;
    --gray: #6B7280;
    --gray-light: #9CA3AF;
    --border: #E5E7EB;
    --border-light: #F3F4F6;
    --bg-page: #F8FAFC;
    --white: #FFFFFF;

    /* Functional Accents */
    --success: #10B981;
    --success-light: #ECFDF5;
    --warning: #F59E0B;
    --warning-light: #FFFBEB;
    --danger: #EF4444;

    /* Radii */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 18px;
    --radius-pill: 9999px;

    /* Shadows */
    --shadow-sm: 0 1px 3px rgba(15, 23, 42, 0.06), 0 1px 2px rgba(15, 23, 42, 0.04);
    --shadow-subtle: 0 4px 16px -2px rgba(15, 23, 42, 0.05);
    --shadow-card: 0 8px 24px -4px rgba(15, 23, 42, 0.06);
    --shadow-hover: 0 16px 36px -6px rgba(229, 57, 53, 0.18);
    --shadow-primary: 0 4px 14px rgba(229, 57, 53, 0.35);
}

/* Base & Typography */
body {
    font-family: 'Poppins', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    color: var(--dark);
    background-color: var(--bg-page);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

h1, h2, h3, h4, h5, h6 {
    font-family: 'Poppins', sans-serif;
    color: var(--dark);
    font-weight: 700;
    letter-spacing: -0.02em;
}

main {
    flex: 1;
}

/* Red Document Badge / Brand Logo */
.brand-logo-container {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    text-decoration: none;
}

.brand-badge-pdf {
    width: 38px;
    height: 42px;
    background: var(--primary);
    border-radius: 6px 14px 6px 6px;
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 4px 12px var(--primary-glow);
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.brand-badge-pdf::before {
    content: '';
    position: absolute;
    top: 0;
    right: 0;
    width: 12px;
    height: 12px;
    background: #B71C1C;
    border-radius: 0 0 0 5px;
    box-shadow: -1px 1px 2px rgba(0,0,0,0.15);
}

.brand-badge-pdf .badge-text {
    color: var(--white);
    font-size: 0.78rem;
    font-weight: 800;
    letter-spacing: 0.04em;
    padding-top: 4px;
}

.brand-title {
    font-size: 1.45rem;
    font-weight: 800;
    letter-spacing: -0.03em;
    line-height: 1.1;
    color: var(--dark);
}

.brand-title .brand-accent {
    color: var(--primary);
}

.brand-tagline-sub {
    font-size: 0.68rem;
    color: var(--gray);
    letter-spacing: 0.02em;
    font-weight: 500;
}

/* Navbar */
.navbar {
    background: var(--white);
    border-bottom: 1px solid var(--border);
    padding: 12px 0;
}

.nav-link {
    font-family: 'Poppins', sans-serif;
    font-weight: 500;
    font-size: 0.94rem;
    color: var(--gray);
    padding: 8px 14px !important;
    border-radius: var(--radius-sm);
    transition: all 0.2s ease;
}

.nav-link:hover, .nav-link.active {
    color: var(--primary) !important;
    background-color: var(--primary-light);
}

/* Buttons (Brand Guide Compliant) */
.btn-mera-primary {
    background-color: var(--primary);
    color: var(--white);
    border: 1px solid var(--primary);
    font-weight: 600;
    font-size: 0.95rem;
    padding: 9px 22px;
    border-radius: var(--radius-sm);
    transition: all 0.2s cubic-bezier(0.16, 1, 0.3, 1);
    box-shadow: var(--shadow-primary);
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
}

.btn-mera-primary:hover, .btn-mera-primary:focus {
    background-color: var(--primary-hover);
    border-color: var(--primary-hover);
    color: var(--white);
    transform: translateY(-1px);
    box-shadow: 0 6px 18px rgba(183, 28, 28, 0.4);
}

.btn-mera-secondary, .btn-mera-dark {
    background-color: var(--dark);
    color: var(--white);
    border: 1px solid var(--dark);
    font-weight: 600;
    font-size: 0.95rem;
    padding: 9px 22px;
    border-radius: var(--radius-sm);
    transition: all 0.2s ease;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
}

.btn-mera-secondary:hover, .btn-mera-dark:hover {
    background-color: var(--dark-hover);
    border-color: var(--dark-hover);
    color: var(--white);
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(15, 23, 42, 0.25);
}

.btn-mera-outline {
    background-color: var(--white);
    color: var(--dark);
    border: 1.5px solid var(--border);
    font-weight: 600;
    font-size: 0.95rem;
    padding: 8px 20px;
    border-radius: var(--radius-sm);
    transition: all 0.2s ease;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
}

.btn-mera-outline:hover {
    border-color: var(--dark);
    color: var(--dark);
    background-color: var(--border-light);
}

.btn-mera-outline-primary {
    background-color: var(--white);
    color: var(--primary);
    border: 1.5px solid var(--primary);
    font-weight: 600;
    padding: 8px 20px;
    border-radius: var(--radius-sm);
    transition: all 0.2s ease;
}

.btn-mera-outline-primary:hover {
    background-color: var(--primary);
    color: var(--white);
    box-shadow: var(--shadow-primary);
}

/* Hero Section */
.hero-section {
    background: linear-gradient(180deg, #FFFFFF 0%, #FFF5F5 60%, var(--bg-page) 100%);
    border-bottom: 1px solid var(--border);
    padding: 65px 0 45px;
    position: relative;
    overflow: hidden;
}

.hero-pill {
    background-color: var(--primary-light);
    color: var(--primary);
    border: 1px solid var(--primary-border);
    font-weight: 600;
    font-size: 0.82rem;
    padding: 6px 16px;
    border-radius: var(--radius-pill);
    display: inline-flex;
    align-items: center;
    gap: 6px;
    margin-bottom: 18px;
}

.hero-title {
    font-weight: 800;
    font-size: 2.85rem;
    line-height: 1.22;
    color: var(--dark);
    letter-spacing: -0.03em;
}

.hero-title .highlight {
    color: var(--primary);
    position: relative;
}

.hero-tagline {
    font-size: 1.15rem;
    color: var(--gray);
    max-width: 650px;
    margin: 14px auto 26px;
    line-height: 1.6;
    font-weight: 400;
}

/* Brand Banner Accent */
.brand-banner-ribbon {
    background: linear-gradient(90deg, #E53935 0%, #B71C1C 100%);
    color: var(--white);
    padding: 12px 20px;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 30px;
    box-shadow: 0 4px 16px rgba(229, 57, 53, 0.25);
}

/* Category Filter Tabs */
.category-tab-btn {
    border: 1px solid var(--border);
    background: var(--white);
    color: var(--gray);
    border-radius: 30px;
    padding: 8px 20px;
    font-size: 0.88rem;
    font-weight: 600;
    margin: 4px;
    transition: all 0.2s ease;
    cursor: pointer;
}

.category-tab-btn:hover {
    color: var(--primary);
    border-color: var(--primary-border);
    background: var(--primary-light);
}

.category-tab-btn.active {
    background: var(--primary);
    border-color: var(--primary);
    color: var(--white);
    box-shadow: var(--shadow-primary);
}

/* Tool Cards */
.tool-card {
    background: var(--white);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    padding: 24px;
    transition: all 0.25s cubic-bezier(0.16, 1, 0.3, 1);
    text-decoration: none;
    display: block;
    height: 100%;
    box-shadow: var(--shadow-sm);
    position: relative;
}

.tool-card:hover {
    transform: translateY(-5px);
    border-color: var(--primary-border);
    box-shadow: var(--shadow-hover);
}

.tool-icon-wrapper {
    width: 50px;
    height: 50px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.45rem;
    margin-bottom: 16px;
    background-color: var(--primary-light);
    color: var(--primary);
    border: 1px solid var(--primary-border);
    transition: all 0.25s ease;
}

.tool-card:hover .tool-icon-wrapper {
    background-color: var(--primary);
    color: var(--white);
    border-color: var(--primary);
    transform: scale(1.05);
}

.tool-card-title {
    font-weight: 700;
    font-size: 1.15rem;
    color: var(--dark);
    margin-bottom: 6px;
}

.tool-card-desc {
    font-size: 0.88rem;
    color: var(--gray);
    line-height: 1.55;
    margin-bottom: 0;
}

.badge-pro {
    background: linear-gradient(135deg, #E53935 0%, #B71C1C 100%);
    color: var(--white);
    font-weight: 700;
    font-size: 0.7rem;
    padding: 4px 9px;
    border-radius: 6px;
    letter-spacing: 0.05em;
}

/* Tool Dropzone */
.tool-dropzone {
    border: 2.5px dashed var(--primary-border);
    background: var(--white);
    border-radius: var(--radius-lg);
    padding: 55px 24px;
    text-align: center;
    cursor: pointer;
    transition: all 0.25s ease;
    box-shadow: var(--shadow-card);
}

.tool-dropzone:hover, .tool-dropzone.dragover {
    background: var(--primary-light);
    border-color: var(--primary);
    box-shadow: 0 10px 30px var(--primary-glow);
}

.dropzone-icon {
    font-size: 3.6rem;
    color: var(--primary);
    margin-bottom: 16px;
}

/* Processing & Result Cards */
.processing-card {
    background: var(--white);
    border-radius: var(--radius-md);
    padding: 32px;
    border: 1px solid var(--border);
    box-shadow: var(--shadow-card);
}

.result-stat-box {
    background: var(--bg-page);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    padding: 16px;
    text-align: center;
}

.result-stat-value {
    font-size: 1.6rem;
    font-weight: 800;
    color: var(--primary);
}

.progress-bar-mera {
    background-color: var(--primary) !important;
}

/* Folder Pill */
.folder-pill {
    background: var(--white);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    padding: 12px 18px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 8px;
    text-decoration: none;
    color: var(--dark);
    font-weight: 600;
    font-size: 0.92rem;
    transition: all 0.2s ease;
}

.folder-pill:hover, .folder-pill.active {
    background: var(--primary-light);
    border-color: var(--primary-border);
    color: var(--primary);
}

/* Footer */
footer {
    background: var(--white);
    border-top: 1px solid var(--border);
    padding: 45px 0 24px;
    margin-top: auto;
}

footer a {
    color: var(--gray);
    transition: color 0.2s ease;
}

footer a:hover {
    color: var(--primary);
}

/* ==========================================================================
   AUTH CARD & FORM INPUTS (SPACIOUS & MODERN)
   ========================================================================== */
.auth-wrapper {
    max-width: 520px;
    width: 100%;
    margin: 0 auto;
}

.auth-card {
    background: var(--white);
    border: 1px solid var(--border);
    border-radius: 20px;
    padding: 44px 46px;
    box-shadow: 0 10px 35px -5px rgba(15, 23, 42, 0.08);
}

@media (max-width: 576px) {
    .auth-card {
        padding: 30px 22px;
        border-radius: 16px;
    }
}

.form-label-modern {
    font-size: 0.92rem;
    font-weight: 600;
    color: var(--dark);
    margin-bottom: 8px;
    display: block;
}

.form-control-modern {
    font-family: 'Poppins', sans-serif;
    font-size: 0.98rem;
    width: 100%;
    padding: 13px 18px;
    border-radius: 10px;
    border: 1.5px solid var(--border);
    color: var(--dark);
    background-color: var(--white);
    transition: all 0.2s ease;
}

.form-control-modern:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 4px var(--primary-glow);
    outline: none;
    background-color: var(--white);
    color: var(--dark);
}

.input-icon-wrapper {
    position: relative;
    display: flex;
    align-items: center;
}

.input-icon-wrapper i.field-icon {
    position: absolute;
    left: 16px;
    color: var(--gray);
    font-size: 1.15rem;
    pointer-events: none;
    transition: color 0.2s ease;
}

.input-icon-wrapper .form-control-modern {
    padding-left: 48px;
    padding-right: 48px;
}

.input-icon-wrapper:focus-within i.field-icon {
    color: var(--primary);
}

.input-icon-wrapper .btn-toggle-password {
    position: absolute;
    right: 10px;
    top: 50%;
    transform: translateY(-50%);
    background: #F8FAFC;
    border: 1px solid var(--border);
    border-radius: 8px;
    color: var(--dark);
    font-size: 1.15rem;
    cursor: pointer;
    padding: 6px 10px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s ease;
    z-index: 5;
}

.input-icon-wrapper .btn-toggle-password:hover {
    background: var(--primary-light);
    color: var(--primary);
    border-color: var(--primary-border);
}

.input-icon-wrapper .btn-toggle-password.is-active {
    background: var(--primary-light);
    color: var(--primary);
    border-color: var(--primary);
}