/* ============================================
   KEPP.APP - Design System Implementation (Version 2)
   Basierend auf Corporate Design Kepp
   Farbwerte aus design-system.md
   ============================================ */

/* ===== CSS Variables ===== */
:root {
    /* Primärfarben aus design-system.md */
    --color-white: #FFFFFF;
    --color-black: #000000;
    --color-dark-gray: #333333;
    
    /* Kepp Gelb (Primäre CI-Farbe) */
    --kepp-gelb: #F9B700;
    
    /* Standard-Linkfarbe */
    --color-link: #0000EE;
    
    /* Schriftarten */
    --font-inter: 'Inter', 'Inter Variablefont', sans-serif;
    --font-arial: Arial, sans-serif;
    --font-gotham: 'Gotham Condensed Ultra', Arial, sans-serif;
}

/* ===== Reset & Base Styles ===== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: var(--font-arial);
    font-size: 14px;
    line-height: 20px;
    color: var(--color-dark-gray);
    background-color: var(--kepp-gelb);
    min-height: 100vh;
    padding: 0;
    margin: 0;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* ===== Main Container ===== */
.main-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 56px 40px;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    gap: 40px;
}

/* ===== Main Card (Top Section) ===== */
.main-card {
    background-color: var(--color-white);
    border-radius: 12px;
    box-shadow: 0 4px 24px rgba(0, 0, 0, 0.12);
    padding: 48px 0;
    width: 100%;
}

/* Card Header */
.card-header {
    display: flex;
    justify-content: flex-start;
    align-items: center;
    margin-bottom: 64px;
    padding: 0 56px;
}

.logo-image {
    height: 60px;
    width: auto;
    display: block;
}

/* Card Content */
.card-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 80px;
    align-items: start;
    padding: 0 56px;
}

/* Ensure both columns start at the same visual baseline and have no extra margins/paddings */
.card-content > * {
    padding: 0;
    margin: 0;
}

/* Promotional Section (Left) */
.promo-section {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.main-heading {
    font-family: var(--font-inter);
    font-size: 72px;
    font-weight: 700;
    line-height: 80px;
    color: var(--color-black);
    text-transform: uppercase;
    letter-spacing: -1px;
    margin: 0;
    padding-top: 0;
}

.promo-description {
    font-family: var(--font-inter);
    font-size: 16px;
    font-weight: 400;
    line-height: 24px;
    color: var(--color-dark-gray);
    margin: 0;
    max-width: 520px;
    padding-top: 8px;
}

/* Login Section (Right) */
.login-section {
    display: flex;
    flex-direction: column;
}

.login-heading {
    font-family: var(--font-arial);
    font-size: 22px;
    font-weight: 700;
    color: var(--color-black);
    text-transform: uppercase;
    margin-bottom: 32px;
    margin-top: 0;
    padding-top: 0;
    letter-spacing: 0.5px;
    line-height: 1.2;
}

.login-form {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.form-label {
    font-family: var(--font-arial);
    font-size: 14px;
    font-weight: 400;
    color: var(--color-black);
}

.form-input {
    width: 100%;
    padding: 12px 16px;
    border: 1px solid #E6E6E6;
    border-radius: 4px;
    font-family: var(--font-arial);
    font-size: 14px;
    color: var(--color-black);
    background-color: var(--color-white);
    transition: border-color 0.2s ease;
}

.form-input:focus {
    outline: none;
    border-color: var(--color-black);
}

.form-input::placeholder {
    color: rgba(51, 51, 51, 0.4);
}

.forgot-password-link {
    margin-top: -8px;
}

.forgot-link {
    font-family: var(--font-arial);
    font-size: 14px;
    color: var(--color-link);
    text-decoration: underline;
    transition: opacity 0.2s ease;
}

.forgot-link:hover {
    opacity: 0.8;
}

.btn-login {
    width: 100%;
    padding: 16px 32px;
    background-color: var(--color-black);
    color: var(--color-white);
    border: none;
    border-radius: 8px;
    font-family: var(--font-arial);
    font-size: 16px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 1px;
    cursor: pointer;
    transition: background-color 0.2s ease;
    margin-top: 8px;
}

.btn-login:hover {
    background-color: var(--color-dark-gray);
}

.btn-login:active {
    transform: translateY(1px);
}

/* ===== Features Section (Bottom Cards) ===== */
.features-section {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 28px;
    width: 100%;
}

@media (max-width: 968px) {
    .features-section {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 640px) {
    .features-section {
        grid-template-columns: 1fr;
    }
}

.feature-card {
    background-color: var(--color-white);
    border-radius: 12px;
    box-shadow: 0 4px 24px rgba(0, 0, 0, 0.12);
    padding: 36px 28px;
    display: flex;
    flex-direction: row;
    gap: 20px;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
    min-height: 160px;
    align-items: center;
}

.feature-icon-wrapper {
    flex-shrink: 0;
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.feature-icon {
    width: 48px;
    height: 48px;
    color: var(--color-black);
    stroke-width: 2;
}

.feature-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.feature-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.16);
}

.feature-heading {
    font-family: var(--font-arial);
    font-size: 18px;
    font-weight: 700;
    color: var(--color-black);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin: 0;
    line-height: 1.4;
}

.feature-text {
    font-family: var(--font-inter);
    font-size: 14px;
    font-weight: 400;
    line-height: 20px;
    color: var(--color-dark-gray);
    margin: 0;
}

/* ===== Responsive Design ===== */
@media (max-width: 1200px) {
    .main-container {
        padding: 40px 24px;
        gap: 40px;
    }
    
    .main-card {
        padding: 48px 0;
    }
    
    .card-header {
        padding: 0 48px;
    }
    
    .card-content {
        gap: 60px;
        padding: 0 48px;
    }
    
    .main-heading {
        font-size: 60px;
        line-height: 68px;
    }
}

/* Tablet Landscape (768px - 1024px) */
@media (max-width: 1024px) and (min-width: 769px) {
    .main-container {
        padding: 40px 32px;
        gap: 36px;
    }
    
    .main-card {
        padding: 44px 0;
    }
    
    .card-header {
        padding: 0 40px;
        margin-bottom: 56px;
    }
    
    .card-content {
        gap: 56px;
        padding: 0 40px;
    }
    
    .main-heading {
        font-size: 56px;
        line-height: 64px;
    }
    
    .promo-description {
        font-size: 15px;
        line-height: 22px;
    }
    
    .features-section {
        gap: 24px;
    }
    
    .feature-card {
        padding: 32px 24px;
        min-height: 140px;
    }
    
    .btn-login {
        min-height: 48px;
        padding: 16px 32px;
    }
    
    .form-input {
        min-height: 44px;
        padding: 14px 16px;
    }
}

/* Tablet Portrait (640px - 768px) */
@media (max-width: 768px) and (min-width: 641px) {
    .main-container {
        padding: 32px 24px;
        gap: 32px;
    }
    
    .main-card {
        padding: 40px 0;
    }
    
    .card-header {
        padding: 0 32px;
        margin-bottom: 48px;
    }
    
    .card-content {
        grid-template-columns: 1fr;
        gap: 40px;
        padding: 0 32px;
    }
    
    .main-heading {
        font-size: 48px;
        line-height: 56px;
    }
    
    .promo-description {
        max-width: 100%;
        font-size: 15px;
        line-height: 22px;
    }
    
    .login-section {
        max-width: 100%;
    }
    
    .login-heading {
        font-size: 20px;
        margin-bottom: 28px;
    }
    
    .features-section {
        gap: 20px;
    }
    
    .feature-card {
        flex-direction: column;
        align-items: flex-start;
        padding: 28px 24px;
        min-height: auto;
    }
    
    .feature-icon-wrapper {
        width: 44px;
        height: 44px;
    }
    
    .feature-icon {
        width: 44px;
        height: 44px;
    }
    
    .btn-login {
        min-height: 48px;
        padding: 16px 32px;
        font-size: 16px;
    }
    
    .form-input {
        min-height: 44px;
        padding: 14px 16px;
        font-size: 16px;
    }
    
    .forgot-link {
        min-height: 44px;
        display: inline-flex;
        align-items: center;
    }
}

/* Mobile (< 640px) */
@media (max-width: 640px) {
    .main-container {
        padding: 24px 16px;
        gap: 24px;
    }
    
    .main-card {
        padding: 32px 0;
        border-radius: 12px;
    }
    
    .card-header {
        margin-bottom: 40px;
        padding: 0 24px;
    }
    
    .card-content {
        grid-template-columns: 1fr;
        padding: 0 24px;
        gap: 32px;
    }
    
    .logo-image {
        height: 48px;
    }
    
    .main-heading {
        font-size: 40px;
        line-height: 48px;
    }
    
    .promo-description {
        font-size: 14px;
        line-height: 20px;
    }
    
    .login-section {
        width: 100%;
        max-width: 100%;
    }
    
    .login-heading {
        font-size: 20px;
        margin-bottom: 24px;
    }
    
    .login-form {
        gap: 20px;
    }
    
    .form-input {
        min-height: 44px;
        padding: 14px 16px;
        font-size: 16px;
        -webkit-appearance: none;
        appearance: none;
    }
    
    .btn-login {
        min-height: 48px;
        padding: 16px 24px;
        font-size: 16px;
        touch-action: manipulation;
    }
    
    .forgot-link {
        min-height: 44px;
        display: inline-flex;
        align-items: center;
        padding: 4px 0;
    }
    
    .features-section {
        gap: 20px;
    }
    
    .feature-card {
        padding: 28px 20px;
        min-height: auto;
    }
    
    .feature-icon-wrapper {
        width: 44px;
        height: 44px;
    }
    
    .feature-icon {
        width: 44px;
        height: 44px;
    }
    
    .feature-heading {
        font-size: 18px;
    }
}

/* Small Mobile (< 480px) */
@media (max-width: 480px) {
    .main-container {
        padding: 20px 12px;
        gap: 20px;
    }
    
    .main-card {
        padding: 28px 0;
    }
    
    .card-header {
        padding: 0 20px;
        margin-bottom: 32px;
    }
    
    .card-content {
        grid-template-columns: 1fr;
        padding: 0 20px;
        gap: 28px;
    }
    
    .main-heading {
        font-size: 36px;
        line-height: 44px;
    }
    
    .promo-description {
        font-size: 14px;
        line-height: 20px;
    }
    
    .login-section {
        width: 100%;
        max-width: 100%;
    }
    
    .login-heading {
        font-size: 18px;
        margin-bottom: 20px;
    }
    
    .btn-login {
        min-height: 48px;
        padding: 14px 24px;
        font-size: 15px;
    }
    
    .form-input {
        min-height: 44px;
        padding: 12px 14px;
        font-size: 16px;
    }
    
    .feature-card {
        padding: 24px 16px;
    }
    
    .features-section {
        gap: 16px;
    }
}