* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background: linear-gradient(135deg, #e74c3c 0%, #c0392b 100%);
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    /* Allow scrolling on small screens instead of clipping content */
    overflow-y: auto;
    padding: 2rem 1.25rem;
}

/* ─── Layout container ────────────────────────────────────────── */
.signup-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    max-width: 1000px;
    width: 100%;
    gap: 3rem;
}

/* ─── Left — Branding ─────────────────────────────────────────── */
.branding {
    flex: 1;
    color: white;
    display: flex;
    align-items: center;
    gap: 1rem;
}

.logo-circle {
    width: 120px;
    height: 120px;
    background: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
}

.logo-circle img {
    width: 85px;
    height: 85px;
}

.brand-name {
    /* Fluid: scales from 2rem (small) up to 3.5rem (desktop) */
    font-size: clamp(2rem, 4vw, 3.5rem);
    font-weight: bold;
    letter-spacing: 2px;
    line-height: 1.1;
}

/* ─── Right — Sign Up Form ────────────────────────────────────── */
.signup-box {
    background: white;
    border-radius: 20px;
    padding: 2rem;
    width: 100%;
    max-width: 400px;
    flex-shrink: 0;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
}

.signup-box h2 {
    color: #e74c3c;
    font-size: clamp(1.4rem, 3vw, 1.75rem);
    text-align: center;
    margin-bottom: 1.5rem;
    font-weight: 600;
}

/* ─── Form fields ─────────────────────────────────────────────── */
.form-group {
    min-height: 75px;
    position: relative;
}

.form-group label {
    display: block;
    color: #e74c3c;
    font-weight: 500;
    margin-bottom: 0.4rem;
    font-size: 0.9rem;
}

.form-group input {
    width: 100%;
    padding: 0.75rem;
    border: none;
    background: #f0f0f0;
    border-radius: 8px;
    font-size: 0.95rem;
    font-family: inherit;
    transition: background 0.3s, box-shadow 0.3s;
    /* Prevent zoom on iOS (font-size must be ≥ 16px on focus) */
    font-size: max(16px, 0.95rem);
}

.form-group input.error {
    background: #ffe6e6;
    box-shadow: 0 0 0 2px #e74c3c;
}

.form-group input:focus {
    outline: none;
    background: #e8e8e8;
    box-shadow: 0 0 0 3px rgba(231, 76, 60, 0.15);
}

.error-message {
    color: #e74c3c;
    font-size: 0.75rem;
    margin-top: 0.3rem;
    margin-bottom: 0.5rem;
    display: none;
}

.error-message.show {
    display: block !important;
}

/* ─── Submit button ───────────────────────────────────────────── */
.signup-button {
    width: 100%;
    padding: 0.9rem;
    background: #e74c3c;
    color: white;
    border: none;
    border-radius: 8px;
    font-size: 1rem;
    font-weight: 600;
    font-family: inherit;
    cursor: pointer;
    transition: background 0.3s, transform 0.2s;
    margin-top: 0.8rem;
    /* Comfortable touch target */
    min-height: 48px;
}

.signup-button:hover {
    background: #c0392b;
    transform: translateY(-2px);
}

.signup-button:active {
    transform: translateY(0);
}

/* ─── Login link ──────────────────────────────────────────────── */
.login-link {
    text-align: center;
    margin-top: 1.2rem;
    color: #666;
    font-size: 0.9rem;
}

.login-link a {
    color: #e74c3c;
    text-decoration: none;
    font-weight: 600;
    transition: color 0.3s;
}

.login-link a:hover {
    color: #c0392b;
    text-decoration: underline;
}

/* ═══════════════════════════════════════════════════════════
   TABLET  ≤ 900px  — stack branding above the form
   ═══════════════════════════════════════════════════════════ */
@media (max-width: 900px) {
    body {
        align-items: flex-start;
        padding: 2.5rem 1.25rem;
    }

    .signup-container {
        flex-direction: column;
        align-items: center;
        gap: 2rem;
    }

    .branding {
        flex-direction: row;
        justify-content: center;
        text-align: left;
        width: 100%;
        max-width: 400px;
    }

    .logo-circle {
        width: 80px;
        height: 80px;
    }

    .logo-circle img {
        width: 58px;
        height: 58px;
    }

    .brand-name {
        font-size: clamp(1.8rem, 5vw, 2.4rem);
    }

    .signup-box {
        max-width: 400px;
    }
}

/* ═══════════════════════════════════════════════════════════
   MOBILE  ≤ 480px
   ═══════════════════════════════════════════════════════════ */
@media (max-width: 480px) {
    body {
        padding: 1.5rem 1rem;
    }

    .signup-container {
        gap: 1.5rem;
    }

    .branding {
        gap: 0.75rem;
    }

    .logo-circle {
        width: 64px;
        height: 64px;
    }

    .logo-circle img {
        width: 46px;
        height: 46px;
    }

    .brand-name {
        font-size: clamp(1.6rem, 6vw, 2rem);
    }

    .signup-box {
        padding: 1.5rem 1.25rem;
        border-radius: 16px;
    }

    .signup-box h2 {
        font-size: 1.4rem;
        margin-bottom: 1.2rem;
    }

    .form-group {
        min-height: 70px;
    }

    .signup-button {
        padding: 0.85rem;
        font-size: 0.95rem;
    }

    .login-link {
        font-size: 0.85rem;
        margin-top: 1rem;
    }
}

/* ═══════════════════════════════════════════════════════════
   SHORT SCREENS  ≤ 600px tall  (landscape phones, etc.)
   ═══════════════════════════════════════════════════════════ */
@media (max-height: 600px) {
    body {
        align-items: flex-start;
        padding: 1rem;
    }

    /* Hide branding so the form fits without scrolling */
    .branding {
        display: none;
    }

    .signup-container {
        justify-content: center;
    }

    .signup-box {
        padding: 1.25rem 1.5rem;
        max-width: 380px;
    }

    .signup-box h2 {
        font-size: 1.35rem;
        margin-bottom: 1rem;
    }

    .form-group {
        min-height: 65px;
    }

    .signup-button {
        margin-top: 0.5rem;
    }

    .login-link {
        margin-top: 0.8rem;
    }
}